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GE EnergyIndustrial Solutions

Arc Vault

Protection SystemApplication and Technical Guide


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2010 General Electric All Rights Reserved


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HAZARD CLASSIFICATIONS

The following important highlighted information appearsthroughout this document to warn of potential hazards orto call attention to information that clarifies a procedure.

Carefully read all instructions and become familiar with

the devices before trying to install, operate, service ormaintain this equipment.

DANGER

Indicates a hazardous situation which, if not avoided, willresult in death or serious injury.

WARNING

Indicates a hazardous situation which, if not avoided,

could result in death or serious injury.

CAUTION

Failure to comply with these instructions may result inproduct damage.

NOTICE

Indicates important information that must beremembered and aids in job performance.

TRADEMARKS

Arc Vault Protection System

EntelliGuard G

EntelliGuard TU

WARRANTY

This document is based on information available at thetime of its publication. While efforts have been made toensure accuracy, the information contained herein doesnot cover all details or variations in hardware andsoftware, nor does it provide for every possiblecontingency in connection with installation, operation,and maintenance. Features may be described herein thatare not present in all hardware and software systems. GEIndustrial Solutions assumes no obligation of notice toholders of this document with respect to changes

subsequently made. GE Industrial Solutions makes norepresentation or warranty, expressed, implied, orstatutory, with respect to, and assumes no responsibilityfor the accuracy, completeness, sufficiency, or usefulnessof the information contained herein. No warrantees ofmerchantability or fitness for purpose shall apply.

Contact your local sales office if further information isrequired concerning any aspect of the Arc VaultProtection System operation or maintenance.

2010 General Electric All Rights Reserved ii


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iv 2010 General Electric All Rights Reserved


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DEH-41484 Arc VaultTable of contents

TABLE OF CONTENTS

SECTION 1. General Information.....................................................................................................................................................................................1

Overview ...........................................................................................................................................................................................................................................1

Product configuration.................................................................................................................................................................................................................1

Arcing fault energy limiting.................................................................................................................................................................................................4

SECTION 2. Features and Characteristics...................................................................................................................................................................6

Components....................................................................................................................................................................................................................................6

Arc Vault Stack..........................................................................................................................................................................................................................6

Arc Vault Device and Cassette ..........................................................................................................................................................................................6

Arc Vault Device & Arc Vault Cassette Connections.............................................................................................................................................10

SECTION 3. Arc Vault Relay and Control System ....................................................................................................................................................3

Arc Vault Control System..........................................................................................................................................................................................................3

Arc Vault Relay & Connections...............................................................................................................................................................................................3

Arc Vault Relay Input Definitions & Ratings.................................................................................................................................................................4

Arc Vault Relay Output Definitions & Ratings.............................................................................................................................................................4

Arc Vault Device Input Definitions....................................................................................................................................................................................7

Arc Vault Device Output Definitions & Ratings...........................................................................................................................................................7

Arc Vault Power Supply..............................................................................................................................................................................................................7

Details of Arc Vault Power Supply....................................................................................................................................................................................7

Current and Potential Transformers....................................................................................................................................................................................8

Details of an Arc Vault current transformer................................................................................................................................................................8

Medium Voltage (MV) or Low Voltage (LV) Main Circuit Breaker Requirements ..............................................................................................8

Controllable upstream device details.............................................................................................................................................................................8

Arc Vault Protection System Tests........................................................................................................................................................................................8

Operating modes ..........................................................................................................................................................................................................................9

SECTION 4. Accessories....................................................................................................................................................................................................10Arc Vault Device/Cassette .....................................................................................................................................................................................................10

SECTION 5. ordering information.................................................................................................................................................................................11

Ordering..........................................................................................................................................................................................................................................11

Arc Vault Stack components ................................................................................................................................................................................................11

Arc Vault Device Compartment...........................................................................................................................................................................................14

Arc Vault Drawout Frame ......................................................................................................................................................................................................14

Arc Vault Indicators and Switches.....................................................................................................................................................................................14

SECTION 6. Application Data..........................................................................................................................................................................................16

Overview ........................................................................................................................................................................................................................................16

Arc Vault Protection System Time Current Curve (AV-TCC)................................................................................................................................17Application considerations....................................................................................................................................................................................................18

System conditions................................................................................................................................................................................................................18

Pickup settings.......................................................................................................................................................................................................................18

Arc Flash incident energy.................................................................................................................................................................................................18

Connection and requirements........................................................................................................................................................................................19

Line side disconnect device selection and control................................................................................................................................................19

Protection Methodology....................................................................................................................................................................................................19

2010 General Electric All Rights Reserved v


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Arc Vault DEH-41484Table of contents

vi 2010 General Electric All Rights Reserved

Configurations.............................................................................................................................................................................................................................21

Configuration 1 Remote Located Stack w/ Arc Vault on Line side of LVPCB mains (CTs in Switchgear) ................................21

Configuration 2 Remote Located Stack w/ Arc Vault on the Line side of the LVPCB mains (CTs not in Swgr) .....................22

Configuration 3 Remote Located Stack w/ Arc Vault on the Load side of the LVPCB mains........................................................23

Product Features........................................................................................................................................................................................................................24

Arc Vault Device Rejection Scheme...................................................................................................................................................................................24

Current and Potential Transformers.................................................................................................................................................................................25

SECTION 7. Physical Data................................................................................................................................................................................................26

Arc Vault Stacks..........................................................................................................................................................................................................................26

Arc Vault Stack details........................................................................................................................................................................................................26

Product Dimensions.............................................................................................................................................................................................................26

SECTION 8. Standards and References.....................................................................................................................................................................27

Applicable Documents.............................................................................................................................................................................................................27

Arc Vault Activation Switch ...................................................................................................................................................................................................27

Arc Vault Protection System Labels..................................................................................................................................................................................28

Code/Agency Requirements.................................................................................................................................................................................................28SECTION 9. Quick Specification Guide and Installation.....................................................................................................................................29

Specification claims..................................................................................................................................................................................................................29

Arc Vault Ready Options for new switchgear...............................................................................................................................................................29

Site Survey for retrofit applications...................................................................................................................................................................................29

Installation environment / Requirements.......................................................................................................................................................................29

Example One Lines...............................................................................................................................................................................................................30

SECTION 10. Frequently asked questions ..................................................................................................................................................................31


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DEH-41484 Arc VaultGeneral Information

2010 General Electric All Rights Reserved 1

SECTION 1. GENERAL INFORMATIONOVERVIEW

The Arc Vault Protection System is a breakthrough arcfault protection technology that can stop an arcing fault inless than eight milliseconds (ms) to provide increased arcflash hazard mitigation with equipment doors open orclosed. This fast arcing fault containment technology canhelp reduce the occurrence and severity of work-relatedinjuries and lost productivity.

The Arc Vault Protection System features an activationswitch (ACT) that can be used during routine maintenance(can be utilized 24x7 depending on the Power Systemrequirements) to put the low-voltage equipment into ahigh-protection mode. When an arc flash event occurs, thesystem will send a signal to the arc containment device.The arc is then diverted to the containment system in lessthan one-half cycle or eight milliseconds depending on

fault conditions. At the same time the decision to divert thearc is made, the system will also make a decision to openan upstream circuit breaker. This will turn off the system inapproximately three cycles, at which point the arc in thecontainment system will terminate. This will turn off thesystem in approximately 3 cycles to 5 cycles depending onthe type and speed of the circuit breaker used, at whichpoint the arc in the containment system will terminate

The Arc Vault Protection System can be retrofitted ontoboth GE and non-GE low voltage switchboards, switchgearand motor control centers to expand its application formost existing facilities. Depending on site conditions, thedesign enables a retrofit installation to be completed withina day. The GE Arc Vault Protection System can be retrofitwithout having to replace the existing low voltageequipment line-up.

The GE Arc Vault Protection System will contain an arcfault in less than 8ms, resulting in incident energy inaccordance with IEEE 1584 at 18 from the arc event atless than 1.2 Cal/cm2, with the circuit breakercompartment doors open, in a 480V 65kAIC system.

The GE Arc Vault Protection System reduces buildingconstruction costs because it does not require exhaustchimneys or plenums to direct the arc flash energy outsideof the building, when compared to traditional arc resistant

switchgear. Additionally, if an arc flash incident occurs

during maintenance, the low-voltage switchgear can beoperational again within a working day assumingappropriate replacement parts are available, whichimproves your overall system uptime when compared totraditional arc resistant switchgear.

The GE Arc Vault protection system reduces the energyflowing through the system by about 60% or morecompared to a bolted fault that would occur with acrowbar system. The energy reduction will lower the stresson other system components such as transformers, circuitbreakers, and bus bar construction and improve youroverall system uptime when compared to traditional arcresistant switchgear.

The GE Arc Vault Protection System will protect thetransformer transition section and the low-voltage line-upin a system that contains an upstream controllable deviceon the transformer primary circuit. In a system where anprimary controllable device does not exist, the GE Arc

Vault Protection System can provide protection to the lowvoltage equipment downstream by controlling thesecondary main in the substation.

PRODUCT CONFIGURATION

The Arc Vault Protection System detects the presence of anhigh magnitude arcing fault via a set of current andpotential transformers. Control electronics and powercircuits create a low impedance three phase arc inside acontainment vessel (Arc Vault Device) within a pre-definedresponse curve (See Figure 6-2 arcing fault transfer. Thecontained, low impedance arc diverts fault current energyinto the vessel until an upstream breaker, signaled by theArc Vault Protection System, opens the circuit. The ArcVault Protection System monitors the status of itscomponents and provides visual and contact closureinformation of its status.

The Arc Vault Protection System includes the followingmajor subsystems (shown in Figure 1-1 and Figure 1-3):

Low Voltage AKD-20 Arc Vault Stack

Arc Vault Device

Arc Vault Relay


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Arc Vault DEH-41484General Information

2 2010 General Electric All Rights Reserved

Figure 1-1 Arc Vault ACT Line Diagram

Target EquipmentEquipment protected

by Arc VaultRetrofit Solution

3 Phase

Current

Arc RelayDetermines presence of event

Sends trip signal to Upstream C.B.Sends signal to Arc Vault Device

Arc Vault

Device

CurrentTransformers

UpstreamCircuit Breaker

PotentialTransformers

3 Phase

Current

1

2

3

4

Target EquipmentEquipment protected

by Arc VaultRetrofit Solution

3 Phase

Current

Arc RelayDetermines presence of event

Sends trip signal to Upstream C.B.Sends signal to Arc Vault Device

Arc Vault

Device

CurrentTransformers

UpstreamCircuit Breaker

PotentialTransformers

3 Phase

Current

11

22

33

44

Figure 1-2 Front panel controls and indicators

ActivationSwitch

SystemStatusLights

BlueFullProtection

WhiteNotFullProtection(RelayOnly)

RedNoProtection

TESTLIGHT

OFF NotActive

Arc RelayVault

86Device ArcVaultLockout

DeviceTestButton

ArcVaultDeviceStatusLights

GreenDeviceReady

Red DeviceNotReady


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System status System Statusindicators(see Figure 1-2)

Panel settings(see Figure 1-2)

Functionality (see Figure 1-1 items 1 through 4)

Off (noprotection)

Blue light OFFWhite light OFFRed light ON

Activation switch = OFFTest switch = OFF

This will be the most common mode of operation for theArc Vault Protection System.Any level of current inrush monitored by the current

transformers will not initiate any actions by the Arc VaultProtection System

Full protection Blue light ONWhite light OFFRed light OFF

Activation switch =ACTIVETest switch = OFF

(1) Any current inrush monitored by the currenttransformers exceeding the threshold limit will initiate thefollowing:(2) Arc Vault Relay will send a trip signal via a dry contactsto the upstream circuit breaker and lock-out relay (86device this device is shown on the picture above)(3) Arc Vault Relay will send a transfer signal to the ArcVault Device and event transfer to Arc Vault Device willoccur(4) Arc Vault Relay will only send transfer signal after aminimum phase voltage (factory set) has been monitoredby the potential transformers

Arc Vault Device will initiate a low impedance 3 phasearcing fault within itselfArc Vault Device will transfer and contain any and allarcing faults in Target Equipment to itselfEvent is cleared from the system via the upstream circuitbreaker and the amber / yellow indication is illuminated

Partialprotection

Blue light OFFWhite light ONRed light OFF

Activation switch = OFFTest switch = OFF

(1) Any current inrush monitored by the currenttransformers exceeding the threshold limit will initiate thefollowing:(2) Arc Vault Relay will send a trip signal via a dry contactsto the upstream circuit breaker and lock-out relay (86device)(3) Arc Vault Relay will send a transfer signal to the ArcVault Device but event transfer to Arc Vault Device will not

occurEvent is cleared from the system via the upstream circuitbreaker

Off (System Testmode)

Blue light OFFWhite light OFFRed light ON

Activation switch = OFFTest switch = ON

(3) Arc Vault Relay will send a transfer signal to the ArcVault Device only if the Arc Vault Device is in the TestPosition within its cassetteArc Vault Device will fire its plasma gun but will not createa low impedance 3 phase arcing fault within itselfArc Vault Device will not transfer or contain any arcingfault in the Target Equipment to itselfTest Mode is concluded when operator returns the TestSwitch to the OFF position

Off (Light Test) Blue light ONWhite light ONRed light ONAmber light ON

Activation switch = TEST All system status indicator lights should turn ON.


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Arc Vault DEH-41484General Information


Figure 1-3 ACT solution block diagram

Red Boxes denote functions located within the Arc Vault Device including Plasma Gun Electronics & Arc Vault Device.Orange Boxes denote functions located within the Arc Vault Relay including Interposing CTs & Arc Vault Relay..Green Boxes denote functions located within the Arc Vault Stack including Lockout Device, Power Source, Test Switch,Activation Switch, Voltage Conditioners, Potential Transformers, Power Supply & Auxiliary Control LogicBlue Boxes denote functions located remote from the Arc Vault Stack including Current Transformers and Main CircuitBreaker also known as Upstream Circuit Breaker.Note: these locations are preferred locations but actual application may duplicate functions and/or locate these functions

remote from the Arc Vault Stack within application limits defined elsewhere in this document.

Arcing fault energy limiting

The Incident Energy limitation provided by the Arc VaultProtection System may be calculated in accordance withthe IEEE 1584 guide when applied as follows.

Uses Medium Voltage (MV) controllable device or LowVoltage (LV) main circuit breaker that operates &interrupts in less than 5 cycles

Connected to 3 Phase/3 Wire and 3 Phase/4 Wire powersystems including delta, floating delta, solidly groundeddelta, solidly grounded wye, high resistance grounded

InterposingCTs*Ratioscurrentto0.2ampnominal

*CurrentinputintoArcVaultRelay

*Providesarcdetection

VoltageConditioners*Ratiosvoltageto1.76voltnominal

*VoltageinputintoArcVaultRelay

*Providesbusvoltagestatus

ArcVaultRelay*Determinespresenceofevent

*SendstripsignaltoMain

CircuitBreaker

*FiresPlasmaGunthru

Aux.ControlLogic

*SendssignaltoLockoutDevice

PowerSupply*ConvertsPowerSourceto24VDC

*Providescontrolbusforsystem

PowerSource*CustomerProvidedorGeneratedby

ControlPowerTransformer

PlasmaGunElectronics*Receives24VDCfromPowerSupply

*Dualpulsesystem

*Powersplasmagunviahigh

current/voltagepulses

ArcVaultDevice*Plasmagunionizesairbetween

electrodes

*Arctransferredintochamber

*Arcsustaineduntilinterrupted

AuxiliaryControlLogic*Monitorsposition/status of

ArcVaultDevice

*Receives24VDCfromPowerSupply

*Providesgo/nogostatestofire

*Passes24VDC&firesignalto

Plasmagun

LockoutDevice*ReceivespowerfromPowerSource

*ReceivestripsignalfromArcVault

Relay

*BlocksclosesignalstoMainBreakeror

UpstreamMediumVoltageBreaker

MainCircuitBreakeror

UpstreamMediumVoltage

Breaker*Interruptscurrentflowviatripsignal

*Extinguishes arcinArcVaultDevice

Test&ActivationSwitches*Userselectabledevices

*Receives24VDCfromPowerSupply

*ONequals24VDCpassedto

ArcVaultRelay

*Provides(2)24VDCsignallogicto

ArcVaultRelay

CurrentTransformers*Ratioscurrent5000/5amps

*Providesinputforinterposing CTs

PotentialTransformers*Ratiosvoltage480/120volts

*ProvidesinputforVoltage

Conditioners

PowerSource*CustomerProvidedorGeneratedby

ControlPower

Transformer


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wye configurations and high resistance grounded deltasystems.

When a remote Arc Vault Stack is used to protect anexisting switchgear line-up, the connecting primarycable or bus length may not exceed 50 linear feet whenusing 2000A copper cables assuming a minimum of (6)500MCM cables per phase.

Frequency: 60Hz nominal; 48 ~ 72Hz application range(based on IEEE C37.50/51 60Hz +/-20%)

Power Source can be transformer fed or generator fed The Arc Vault Protection System limits the maximumincident energy, successfully transfers an arc energy to theArc Vault Device and contains the arc therein. See Table1-1 and Figure 6-1 for maximum incident energy andvoltage ratings. These ratings apply when the equipmentdoors are either opened or closed.

Maximum Phase to Phase Voltage of 508 VAC

Minimum Phase to Phase Voltage of 380VAC

Nominal Phase to Phase Voltage 460-480VAC

Used with silver or tin plated copper or aluminum buseither bare or insulated Table 1-1 Arc Vault Protection System Maximum Incident

Energy One arc vault system is designed to protect one bus.

Protection for systems with multiple buses is possibleand configuration may vary. Contact your GEEngineering Services office for consultation.

MaximumIncidentEnergy

Voltage &InterruptionLevels

WorkingDistance(Bus toChest)

AnyEquipmentDoor(Open/Closed)

N/A 508V/10kA 18 Inches Open orClosed

Less than1.2cal/cm2

508V/65kA 18 Inches Open orClosed

Provides protection as defined later in this specificationfor single, double ended or multi-sourced switchgearline-ups with open transition tie breaker schemes only.Closed transition and parallel switchgear schemes arenot in the scope of this product.


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Arc Vault DEH-41484Features and Characteristics


SECTION 2. FEATURES AND CHARACTERISTICSCOMPONENTS

Arc Vault Stack

The Arc Vault Stack contains the Arc Vault Device/Cassette

and the Arc Vault Relay, potential transformers and/orauxiliary control devices The Arc Vault Stack is a free-standing structure for retrofit or new installation /applications. The allowable configurations of the ArcVault Stack are documented in the GE AKD-20 UL/CUL fileas a classified system and configured within the GErequisition engineering system.

Arc Vault Device and Cassette

3 position closed door draw-out device within the ArcVault Stack

Fits into a 22 wide by 21 high compartmentconstruction, see Arc Vault Stacks in section 7.

All optional accessories used with GE AKD-20switchgear frame 2 cassettes are available. Someexamples are Kirk-key interlocks, shutters, positionswitches, racking handle, remote racking device,defeatable door interlocks, etc.

The Arc Vault triggering system receives a signal fromthe Arc Vault Relay to transfer energy and containsituntil either a medium voltage (MV) or low voltage (LV)upstream circuit breaker clears the current from thepower system

Arc Vault Device requires service and/or replacement

after 1 arc incident transfer event Replacement of Arc Vault Cassette components or Arc

Vault Stack components is not required after an arcincident transfer event of 6 cycles or less.

The Arc Vault Device contains an event pop-out targetthat activates when the Arc Vault Device receives atransfer signal from the Arc Vault Relay. The event pop-out target may be manually reset after ensuring t theArc Vault Device and system is fully operational.

Figure 2-1 Arc Vault Device

Figure 2-2 Arc Vault Device in cassette


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DEH-41484 Arc VaultFeatures and Characteristics


Figure 2-3 Arc Vault Device Face Plate

ChargedDischarged ChargedChargedDischarged Charged


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Figure 2-4 Front view of Arc Vault Instrument Tray

Systeminstrumenttray

86Device ArcVaultLockout

ArcVaultRelay

DeviceInstrumentTray

ArcVaultDevice


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DEH-41484 Arc VaultFeatures and Characteristics


Figure 2-5 Freestanding Arc Vault Stack (Arc Vault Cassette not shown)


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Arc Vault Device & Arc Vault Cassette Connections

The Arc Vault Device secondary disconnect connection isshown in Figure 2-6. The gray highlighted cells indicateresponse behavior that does not vary with the position of

the Arc Vault Device within its cassette.The Arc Vault Device has sufficient control input andoutputs to protect a single power source within aswitchgear application.

The Arc Vault Device and Arc Vault Cassette:

Is a Closed door draw-out device with (4) uniquepositions of connect, test, disconnect and withdrawn

Is powered by a Power Supply described later in thisdocument and external from the cassette and Arc VaultDevice

Each secondary disconnect point can support thetermination of two wires and optional wire markersusing either spade or ring type terminals

Each primary disconnect uses a single finger clusterassembly

Utilizes a unique rejection scheme that prevents anEntelliGuard G circuit breaker from racking into an ArcVault Cassette and prevent an Arc Vault Device fromracking into an EntelliGuard G Envelope 2 cassette

Wire type, size and rating is compliant with NEC andC37.20.1 standards and use acceptable wiring practices

Can be bench tested by GE Energy Services without aconnection to the entire Arc Vault Protection System.The testing will perform the following field acceptancetests to confirm the Arc Vault Device is acceptable foroperation prior to installing a device into service (Note:Dielectric integrity can be performed with commerciallyavailable test equipment and is not included in thestandard bench tests:

o Verify operation of plasma gun and circuitryincluding sensing phase voltage collapse at the ArcVault Device primary disconnects

o Verify operation of all Arc Vault Device visual

indicators & operation of all input and output signals The Arc Vault Device indicators and auxiliary contacts

are independent of 24VDC control power input from thePower Supply

At initial start-up the Arc Vault Device reports its statusas Not Ready until all input/outputs can be verified

Output contacts are compatible for both inductive andresistive load circuits

Input contacts do not require high fidelity contacts andare compatible with standard contacts used in SB-1, SB-9, SBM, CR104 and P9 control devices.

Will operate without degradation of performance when

used with defined control power transformer (CPT)schemes.

Can be provided or used with any combination of thefollowing optional accessories:

o Door Interlock, (1) or (2) kirk key locks, shutters, AKD-20 remote racking device, mimic bus, lifting tool.

Capacitor charging and discharging circuits are fullycontained within the Arc Vault Device with exception ofthe externally provided 24VDC control power from thePower Supply

Racking mechanical interlocks within the Arc Vault

cassette & internal to the Arc Vault Device prevents theracking of an Arc Vault Device from any position in acassette unless the Arc Vault Device capacitors are fullydischarged.

Arc Vault Device is equipped with two momentary pushbuttons and a mechanical flag with clear viewingwindow. A red colored Discharge button and a blackcolored Charge button.

The Arc Vault Device is equipped with a pull-out tangcomprising of holes allowing a user to padlock thedevice in either the Discharge or Charge state followingOSHA lock-out/tag-out requirements. Depressing theDischarge or Charge buttons will drive a positive actionmechanical system within the Arc Vault Device that willaccomplish the actions below. All these actions areinternal to the Arc Vault Device and behave the samewhen the Arc Vault Device is not inserted in an Arc Vaultcassette.


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Discharge button actions:

o Changes the indicator flag to Discharged

o Opens an electrical positive action switch that willisolate the 24VDC power supply from the capacitorcharging circuit

o Closes an electrical switch that will engage the ArcVault Device capacitors to a discharging circuit

o Fully discharging of the capacitors is realized beforean operator can insert a racking handle into the ArcVault Cassette

o There is a yellow indication light on the front fasciaof the Arc Vault Device in between the redDischarged light and the green Charged lightthat will illuminate during discharge; the totaldischarge time is about 5 seconds.

o Mechanically releases a lever and roller that will

allow a user to open the racking door on the ArcVault cassette

Charge button actions:

o Changes the indicator to Charged

o Closes an electrical positive action switch that willengage the 24VDC power supply to the capacitorcharging circuit

o Opens an electrical positive action switch that willisolate the Arc Vault Device capacitors from thedischarge circuit

o There is a yellow indication light on the front fasciaof the Arc Vault Device in between the redDischarged light and the green Charged lightthat will illuminate during charging; the total chargetime may take about 90 seconds.

o Mechanically hold a lever and roller that will preventa user from opening the racking door on the ArcVault cassette

The cassette has field installable primary stab tipssimilar to replaceable stab tips for GE AKD-20 style LVSwitchgear.

The cassette has only three line side (upper) primaryconnections to interface with both the switchgear riserassembly and the draw-out Arc Vault Device. Provisionsfor load side (lower) primary connections are notavailable.

Figure 2-6 Arc Vault Secondary Disconnect & Position Switch Diagrams

28 29 30

Secondary Disconnects

Arc Vault Device

PHA Line

(Upper)

PHB Line

(Upper)

PHC Line(Upper)

Primary Disconnects

3427

Target

(NO) (NC)

Target

(NO) (NC)

1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26

39

Pgun Fire InputCap Charging

Input

35 36 37 3831 32 33

Cap Status

(NO) (NC)

Cap Status

(NO) (NC)


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DEH-41484 Arc VaultArc Vault Relay and Control System


SECTION 3. ARC VAULT RELAY AND CONTROLSYSTEM

ARC VAULT CONTROL SYSTEM

The Arc Vault relay integrates the system of the ArcVault Relay, current transformers, potentialtransformers, power supply and auxiliary controldevices interconnected to monitor the equipment for anevent via a dedicated network within the switchgearassembly.

Current Transformers and Potential Transformersmeasure current and voltage to supervise trip operation.See description on Figure 3-1 and SECTION 6.

The Arc Vault Protection System monitors the currenttransformers, potential transformers and confirms theincident by comparing current levels to a user setthreshold. Current levels are pre-defined user selectable

settings within the Arc Vault Relay. Upon exceeding thecurrent threshold setting and confirming an acceptablepresence of voltage, the Arc Vault Relay sends a signalto the Arc Vault Device and initiates a trip to either a MVcontrollable device or LV main circuit breaker along withinitiating a trip to a lockout (86) device.

The Arc Vault Relay is configurable by the user to set thethreshold of current at 0.8X, 1.0X, 1.5X, 2.0X, 2.5X, 3.0X,where X is the primary current rating of the currenttransformer.

Uses current transformers rated 5000/5 amps for allapplications ratings ; X = 5000A

Uses potential transformers rated 480 or 600/120 voltsand voltage conditioners for all application ratings.

Uses a 1 per unit rating plug that will not provide anyscaling of the primary rating of the current transformers

Is equipped with inputs for current transformers, voltagetransformers, 24VDC control power, test switch andactivation switch signals. Arc Vault Relay is equippedwith outputs to initiate arc transfer in the Arc VaultDevice, trip the upstream circuit breaker, activate alockout (86) device and provide positive feedbackcontact closure to activation switch

Quantity of Arc Vault Relays, current transformers,potential transformers, power supplies and auxiliarycontrol devices will vary and be dependent upon powersystem configuration and defined by engineeringstandards

Arc Vault Relay, current transformers, potentialtransformers, power supplies and auxiliary controls canbe provided separately for remote placement requiredby such applications

Components are capable to support field made wireterminations to support retrofit applications. No catalognumbers are required for wire harnesses.

Arc Vault Relay will monitor an Activation switch, whichhas three unique positions of Off, On & Test. When

a user changes the activation switch to the Onposition, the Arc Vault Relay will provide the user withprotection as defined later in this document, will displayan icon on its screen and provide a contact closure(positive feedback) allowing a user to confirm its mode ofoperation.

Arc Vault Relay will have an internal watchdog that willflash a LED on the face of the Arc Vault Relay to indicateif the relay is okay or defective. If the Arc Vault Relay isdefective, it will not display the protection icon on its LEDscreen and will not change to state of the output contact(positive feedback)

ARC VAULT RELAY & CONNECTIONS

Arc Vault Relay Control Power Input is 24VDC derivedfrom GE Power Leader Power Supply #PLPS4G01 or#PLPS3G01. See Arc Vault Power Supply on page 7.

Arc Vault Relay is door mounted and fits onto a 22 wideby 21 high auxiliary compartment door

Each connection point can support the termination oftwo wires and optional wire markers using either ring orspade type terminals

Location of Arc Vault Relay and CTs are placed for eachspecific switchgear assembly within component limitsand engineering standards

Can be bench tested by GE Energy Services as anindividual component without a connection to entire ArcVault Protection System

Arc Vault Relay indicators are active only when 24VDCcontrol power input available

At initial start-up, the Arc Vault Relay reports its status asNot Ready until the internal watchdog has determinedthe unit is operational at which point the Arc Vault Relaywill report its status as OK or Active.

Operates without degradation of performance whenused with standard control power transformer (CPT)schemes. Ride-through for control power transfer is 300msec.

Additional relays or meters may be connected to theCTs as long as the CT application limits are notexceeded. Need to specify additional burden that the5000/5A CTs can accommodate (in addition to the ArcVault Relay)


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Arc Vault DEH-41484Arc Vault Relay and Control System


Arc Vault Relay Output Definitions & Ratings The Arc Vault Relay will display an icon and change itsPositive Feedback output contact to (NC) when the userplaces the activation switch into the On mode and theinternal watchdog has confirmed that the relay is in theprotective mode. What icon? LED on instrumentpanel?

All output contacts are shown in the normal (no fault /system ready) state and are held active (closed) fornormally open contacts (NO) or held active (open) fornormally closed contacts (NC). Loss of control power fromthe Power Supply to the Arc Vault Relay changes outputcontacts from their normal state.Arc Vault Relay Input Definitions & Ratings

Arc Vault Fire Dedicated output to initiate the operationof the plasma gun within the Arc Vault Device when anevent has been detected. This contact mimics a singlenormally open (NO) contact with a rating of 24VDC..

Control Power The Arc Vault Relay power source input israted for 24VDC and provided by Arc Vault Power Supply.See Arc Vault Relay description in Figure 3-1. Arc VaultPower Supply on page 7. See Figure 3-1 and Figure 3-3 forwiring configuration. Positive Feedback Output Dedicated dry contacts to

provide a contact closure confirming that the relay hasreceived an On input from the activation switch and thatthe relay internal watchdog confirms the protective modeis active. Comprised of a single form-c contact with arating of 24VDC~250VDC/30 amps or 85VAC~260VAC,50/60Hz, 20amps.

Voltage Conditioners confirm the presence of minimumphase voltage prior to initiating the transfer of the event tothe Arc Vault Device.

Test Switch input to monitor status of a user initiated testof the Arc Vault Protection System. See Arc Vault Relay

Figure 3-1 for input behavior and wiring configuration. Theswitch positions are labeled as NORMAL (center position)and TEST (right position). The switch has a spring returnto NORMAL position from TEST position.

Breaker Trip Dedicated dry contacts to initiate theopening of either a MV circuit breaker or a LV main circuitbreaker when an arc flash incident has been detected. Thisis a single normally (NO) contact with a rating of24VDC~250VDC/30 amps or 85VAC~260VAC, 50/60Hz,20amps. Use of this contact is restricted to the tripping ofan upstream circuit breaker as described in Figure 3-2.

Activation Switch input to monitor the status of a userinitiated activation of the Arc Vault Protection System.See Arc Vault Relay Figure 3-1 for input behavior andwiring configuration. The switch positions are labeled asON, NORMAL and OFF (TEST OFF ON) The switchhas a spring return to ON position from TEST positionwhile all other positions are maintained.

86 Trip Dedicated dry contacts to initiate operating thelock-out relay (86 device) when an arc flash incident hasbeen detected. Comprised of a single normally (NO)contact with a rating of 24VDC~250VDC/30 amps or85VAC~260VAC, 50/60Hz, 20amps. Use of this contact isrestricted to tripping the lock-out relay (86 device) asdescribed in Figure 3-2.

Current Transformers (Phase A, B, C, COM) current signal

inputs to monitor presence of fault current during an event.These inputs require use of 5000/5 amp, C200 CTs. SeeFigure 3-1 for wiring configuration.


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Figure 3-1 Arc Vault Relay & CT Connection Diagram

Load

N

86 Trip

Qty 1

N (opt)

COM

Input Contacts/Signals Output Contacts

VoltageConditioner

PHA

PHA PHB PHC

Line/Source

CT's

Gnd

PHA

PHB

PHC

ACT

Switch

Input

Control

Power

Input

VoltageConditioner

PHB

Bkr Trip

Qty 1Test

Switch

Input

VoltageConditioner

PHC

External Inputs

Arc

Vault P-

Gun Fire

Qty 1

Arc Relay

Positive

Feed-

back

Output

The relay system will allow the user to select a setting from0.8x to 3x in 0.2x increments.

Note: The system always assumes a 5000A nominalsystem for the trip setting regardless of the equipmentnominal rating (e.g. 800A, 1600A, 2000A, 3200A, 4000A,etc.)


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Figure 3-2 Arc Vault Relay Trip Connection Diagram

TB TB

TB TB

Customer

Supplied Control

Power

FUSE

Arc Relay

86 Trip

86

Event

Customer

Supplied Control

Power

FUSE

Arc Relay

Bkr Trip

Main Bkr

Shunt Trip

LV Main Bkr or MVTra r Primary Bkrnsforme

Arc Vault Relay Bkr Trip and 86 trip contacts are typically wired internally to the lockout relay or to a terminal block point(TB) when tripping a circuit breaker external from the switchgear assembly. The control bus for these circuits will either bederived by a customer supplied source or a dedicated CPT source (ex.UPS, capacitor trip, station battery) within the ArcVault Protection System stack.

The Arc Vault Relay and Voltage Conditioners use an industry standard PT ratio of 480/120.


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Figure 3-3 Arc Vault Relay Power Supply Connection Diagram for AC Control Power

Customer suppliedcontrol poweror UPS

To Arc Vault Relay andDevice Connection

Arc Vault Device Input Definitions

Plasma Gun Fire Input dedicated input from switchgearcontrol wiring to receive fire signal from Arc Vault Relay.

Cap Charging Input dedicated input from Arc VaultPower Supply (24VDC) for the plasma gun fire circuit,capacitor charging and other internal Arc Vault Devicecircuits.

Arc Vault Device Output Definitions & Ratings

All output contacts are shown with the Arc Vault Device inthe Connect position, the capacitors fully discharged (orpartially charged) and the target reset.

Cap Status Output Dry contacts used to monitor thecapacitor status and comprised of (2) form-c contacts thatchange state based upon the charge status of thecapacitors. The contacts are held active when thecapacitors are fully charged. A portion of these contactsare used in the control circuit and the remaining contactsare available for customer defined use. Contact ratings are24VDC~250VDC/0.5 amps or 85VAC~260VAC, 50/60Hz, 6amps.

Target Output Dry contacts used to monitor Plasma gun

target status and comprised of (2) form-C contacts thatchange state when a signal is received from the Arc VaultRelay through the plasma gun Fire Input and the plasmagun Target changes state. The target and contacts aremanually reset All of these contacts are used in the controcircuit. Contact ratings are 24VDC~250VDC/0.5 amps or85VAC~260VAC, 50/60Hz, 6 amps.

ARC VAULT POWER SUPPLY

Each Arc Vault Protection System is provided with adedicated Power Supply to convert the customer availableAC or DC control bus source to a 24VDC control busspecific for the Arc Vault Protection System. This Power

Supply should not be used to support other devices orsystems beyond this specification. See Figure 3-3 for atypical connection diagram.

Details of Arc Vault Power Supply

Used with customer supplied or control powertransformer (CPT)-generated power sources. Customerpower supplied source could be a CPT connected to theArc Flash Protected bus, battery bank or a separatelyderived AC source. Output will be maintained for a

(Figure 3-1)

Arc Vault Relay


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sufficient time to ensure successful operation in theevent of an input voltage drop due to an arcing event.

Generates a 24VDC output power source for the ArcVault Protection System components.

Is surface mounted and fits onto a 22 wide by 21 high

auxiliary rear compartment barrier or intermediatehinged barrier.

Each connection point can support the termination oftwo wires and optional wire markers.

Wire type, size and rating is compliant with NEC, UL1558and C37.20.1 standards and acceptable wiring practices.

The location of Arc Vault Power Supply and necessaryfuses/grounds are defined by engineering standards foreach specific switchgear assembly and withincomponent and technical limits.

The power supply can be bench tested as individualcomponent without a connection to the entire Arc VaultProtection System.

Supports the following devices without degradation inperformance:

o Arc Vault Relay up to (1) maximum

o Arc Vault Device up to (1) maximum

o ET-16 LED Indicating Lights up to (9) maximum

o C-2000 Auxiliary Relay up to (8) maximum

Will operate without degradation of performance whenused with GE switchgear control power transformer(CPT) schemes that operate in 300 msec or less.

Will operate without degradation of performance withcustomer provided power source that can either begrounded or ungrounded per NEC requirements.

Scalable such that more than one Power Supply/ArcVault Protection System can be used withoutdegradation in performance if more than 16 stacks ofswitchgear require protection.

CURRENT AND POTENTIAL TRANSFORMERS

Each Arc Vault Protection System is provided with a set of

current transformers to monitor the current flowing to theswitchgear intended for protection. See Figure 3-1 for atypical connection diagram.

Details of an Arc Vault current transformer

Uses a ratio of 5000/5 Amps, C100 Class solid core.

Shipped separately to be installed by a contractor orend-user.

Compliant to all IEEE and UL standards for a relayingand metering class CTs.

The Current Transformer and Arc Vault Relayperformance is not degraded with variation in cable andbus geometry through the solid core CT window.

MEDIUM VOLTAGE (MV) OR LOW VOLTAGE (LV) MAINCIRCUIT BREAKER REQUIREMENTS

The Arc Vault Protection System will rely upon either acircuit breaker on the medium voltage (MV) side of thetransformer or a low voltage (LV) main circuit breaker toisolate the power source from feeding an event. Thisdevice is commonly referenced as a controllable upstreamdevice.

Controllable upstream device details

A Switch or Circuit Breaker that is capable of beingtripped via a dry contact (Breaker Trip) from the Arc

Vault Relay. Is fully rated to interrupt the voltage and short circuit

rating of the connected power system.

The Switch or Circuit Breaker close circuit can becontrolled electrically with a dry contact from the Lock-out Relay (86) to prevent accidental re-closure after anarc flash incident has occurred.

Will interrupt and clear the full short circuit rating of theconnected power system within 5 cycles or less.

ARC VAULT PROTECTION SYSTEM TESTS

The Arc Vault Protection System can be tested whileinstalled within the switchgear assembly.

Arc Vault Device/Arc Vault Relay Test: Using the controlcircuits an operator may perform this test without the useof an Arc Vault test kit. The test is initiated by turning theTest Initiate Switch to the Test position and all operationsoccur automatically. By the nature of the control circuitthis test can not be initiated unless the Arc Vault Device isin the Test position.

This test confirms functionality of:

The Arc Vault Relay Plasma Gun fire contact, switchgearwiring and Arc Vault Device capacitor and Plasma Gun

circuits. Control power, Arc Vault Power Supply, Arc Vault

Indicating Lights/Signals and Lock-out Device (86).

Arc Vault Device Position Switches, Cap Status Contacts,Cap Status Indicators, Target Contacts and switchgearwiring.

This test does not confirm functionality of:

Arc Vault Relay Current Transformers.


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Arc Vault Device transfer capability or voltage collapseacross Arc Vault Device electrodes.

Dielectric Integrity of Arc Vault Device or Arc VaultCassette.

Does not open upstream circuit breaker or confirm

operation of upstream circuit breaker trip circuit.

OPERATING MODES

Three dedicated indicating lights that provide distinctstatus of readiness (Modes) for the Arc Vault ProtectionSystem. The customer can select or affect these modes of

operation by either changing the position of the Activationswitch or racking the Arc Vault Device within its cassette.The mode of operation can also automatically changebased upon the Readiness of the Arc Vault ProtectionSystem components. See Table 3-1 below for details.

The indicating lights of the Arc Vault Protection System willnot provide the customer with a false level of protection inany mode of operation including failure of the Arc VaultProtection System components.

Table 3-1 ACT operating modes

Activation Switch(User Selectable)

Arc Vault Device Arc Vault Relay Red IndicatingLight (NoProtection Mode)

White IndicatingLight (Arc VaultRelay Mode)

Blue IndicatingLight (Arc VaultRelay & AVDMode)

Off Not Ready Not Ready On Off OffOff Ready Not Ready On Off Off

Off Not Ready Ready On Off Off

Off Ready Ready On Off Off

On Not Ready Not Ready On Off Off

On Ready Not Ready On Off Off

On Not Ready Ready Off On Off

On Ready Ready Off On On


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Arc Vault DEH-41484Accessories


SECTION 4. ACCESSORIESARC VAULT DEVICE/CASSETTE

The Arc Vault Device/Cassette can be provided with thefollowing accessories and standard equipment.

Up to two field installable optional kirk key interlocks.(optional

Racking Handle storable within Arc Vault DeviceCassette Standard.

Optional Racking Handle not storable within Arc VaultDevice Cassette.

Lifting Bar for use with lifting means.- Standard.

Optional Door Interlock. Permits opening cubicle dooronly when AV device is racked to the TEST orDISCONNECT position

Optional 4 sub base assembly


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DEH-41484 Arc Vaultordering information


SECTION 5. ORDERING INFORMATION Additional relaying and control requirements includingcontrol of the upstream interrupting device

ORDERING Primary power feed provisions including top feed,

bottom feed and cable routing (eg. Busway or cabletray)

The Arc Vault Protection System is a requisition engineeredproduct that is ordered similar to LV switchgear. The keyaspects to define prior to ordering are:

Site specific requirements such as power system studiesand arc flash studies, height of room, location of the ArcVault Protection System, mounting provisions likehousekeeping pad provisions, and CT placement (zone ofprotection)

System Voltage

System Frequency

System Max kA

System control voltage, 120/240VAC, 120/240VDC,48VDC including UPS if required

ARC VAULT STACK COMPONENTS

The Arc Vault Stack consists of unique riser codes or stackthat will support the applications detailed in ApplicationData section. See Figure 5-1 for stack details.

Arc Vault lock out arrangement (ex. 86 lockout)

Lifting and racking means (including remote racking)

Special wiring including special key locking provision


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Arc Vault DEH-41484ordering information


Figure 5-1 Arc Vault Stack

28

ArcVaultDevice


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Figure 5-2 Exhaust Door Location and Dimensions (side view)

Intersectioncontrol wiring

trough

Electronicscompartment

Arc Vaultdevice

compartment

Compartmentdoors

Bottomelectronics

compartment

including UPS

Exhaust Door requires clearancefrom conduit, plumbing and other

mechanical devices

Open ExhaustDoor Height is

94.1 inches

Cable Connect

Bus

Ceiling height above exhaustdoor must be min. 12 feet.Exception to this requirement isabove cable entry space.Sprinkler heads can not belocated within a 5-foot radius ofthe perimeter of the Arc Vaultstack.


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Arc Vault DEH-41484ordering information


Figure 5-3 Arc Vault Stack Controls and Indicators

ActivationSwitch

ARC VAULT DEVICE COMPARTMENT

The Arc Vault Device Compartment consists of an Arc VaultDevice Cassette along with a set of unique sub-assembliesto integrate this assembly into the Arc Vault Stacksdetailed in Section 7.

ARC VAULT DRAWOUT FRAME

The drawout frame is similar to a standard circuit breakerand includes a Closed door draw-out device with (4) uniquepositions of connect, test, disconnect and withdrawn.

ARC VAULT INDICATORS AND SWITCHES

The preferred location for the Arc Vault Activation (ACT)Switch and Indicating Lights is within the instrument tray.Location of these components can be elsewhere withintechnical defined limits of requisition engineering.

The instrument tray shall include the following components

as illustrated in Figure 5-3.

4 circuit breaker control fuses (optional quantity from 0up to a maximum of 4)

2 Arc Vault Device indicating lights (1 Red IL, , 1 Green IL)

4 Arc Vault Protection System indicating lights (1 Blue, 1Yellow, 1 Red and 1 White)

SystemStatusLights

BlueFullProtection

WhiteNotFullProtection(RelayOnly)

RedNoProtection

TESTLIGHT

OFF NotActive

ON Active

86

Relay

ArcVaultLockout

ArcVaultDeviceStatusLights

GreenDeviceReady

Red DeviceNotReady

Fuses optional

(not

shown)


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Figure 5-4 Arc Vault Instrument Trays

BlueLightindicatesfullsystemprotection

YellowLightindicatesevent

RedLightindicatesnoprotection

WhiteLightindicatesRelayonlyprotection

SystemActivationSwitch

GreenLightindicatesArcVaultDeviceReady

RedLightindicatesArcVaultDeviceNotReady

ArcVaultDeviceTestSwitch


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32/49

DEH-41484 Arc VaultApplication Data


ARC VAULT PROTECTION SYSTEM TIME CURRENT CURVE(AV-TCC)

Figure 6-1 is the AV-TCC. The device will work from thesensed current that is expected to be an arcing fault or

high impedance fault that allows the system voltage tostay high enough to trigger the GE Arc Vault ProtectionSystem. The current sensing may be adjusted from 4000 Ato 15000 A in 1000A increments (5000A CT, 0.8X to 3X in0.2X increments).

Figure 6-1 Arc Vault Protection System Time Current Curve (AV-TCC)

Arc Vault Transfer Timing,

>= 22kA Ibf, 480V, >=25mm gap

0.001

0.01

0.1

1

10

100

1000

1000 10000 100000Ia (Amperes)

Seconds

Min

Pickup,

4kA

Max

Pickup,

15kA

The AV-TCC is derived from the curve shown in Figure 6-2.This figure represents the transfer time for tests done at480V with a 25mm arcing gap at the fault initiation point.Tests where done at various available fault currents (Ibf)ranging from 10kA to 65kA. The arc was initiated in anopen box sized at 20x20x20 or smaller. The AV-TCCapplies only to systems able to deliver 22kA or higher Ibf.The two diagonal lines are the constant energy lines for 1.2calories at 18 with a 25mm electrode gap: the blue upper

line is for a 480/277V grounded system, the red lower lineis for a 480V floating or high resistance grounded system.The horizontal dotted upper lines represent the typicalclearing range for a low voltage power circuit breaker, 2.5 3 cycles at 60Hz.


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Arc Vault DEH-41484Application Data


Figure 6-2 Arc Vault Protection System Response Curve

Time vs. Ibf, 25mm arc gap

0.001

0.010

0.100

10 100Ibf (480V, 25mm) (kA)

Time(seconds)

AV Transfer t

1.2cal, 18"WD, HRG1.2cal, 18"WD, SG3 cycles

Typical Instantaneous operating time

for a LVPCB, 2.5-3.5 cycles, ~0.05S

Arc Vault full transfer time after arc initiation,7ms 22-65kA Ibf 25mm, 480V

Constant energy lines, 1.2cal/cm2

Solidly groundedHRG/floating

APPLICATION CONSIDERATIONS

Time Current Curve (TCC) for Arc Vault used in a 480Vsystem, based on 25mm minimum arcing gap (may belarger, but not smaller) at the protected equipment and22kA or larger Ibf at the bus where the Arc Vault isconnected.

System conditions

Full post arc initiation time from 22kA to 65kA Ibf, basedon a 25mm gap is 7 milliseconds. Nominal 480V.

o Larger arcing gaps should result in faster or equaltransfer times.

o Timing applies to systems with a nominal 480V.Lower or higher voltage may result in slightlydifferent timing with no significant effect on incidentenergy.

o Timing applies to solidly grounded, resistancegrounded or floating systems at 480V.

o Timing is based on transfer from an open box,timing to transfer an arc from a fully enclosed boxmay vary.

Available fault current at the protected bus may be aslow as 14kA, but minimum 22kA at the bus where thearc Vault is connected.

Pickup settings

Operation of the Arc Vault is based on its own arcing gapand the gap at the original fault arc point. Tests wheredone with a 25mm gap at the original arcing faultinitiation point. Transfer time for fault gaps with largergaps will be equal or faster than indicated in AV TCC.

The system required three 5000A CTs of class C100 orbetter. Settings may be adjusted from 80% to 300% ofCT rating in 20% increments. The setting has a + 10%reading tolerance, i.e. 9%, +11% of nominal pickupsetting shown on TCC.

85% expected arcing current MUST be higher than themaximum tolerance for the selected pickup setting ofthe Arc Vault sensing system.

The arcing gap at the original arcing fault pointdetermines the fault arcing current which drives the ArcVaults sensing system. It is important to set the arcvault sensing threshold below the minimum expected

arcing fault current, accounting for all device andsystem tolerances, to be protected against. It issuggested the pickup setting be as low as can reliablybe implemented in the situation.

Arc Flash incident energy

The Arc Vault TCC may be used in Arc Flash calculationson all 480V, solidly grounded, impedance grounded, orfloating, systems expected to deliver 22kA to 65kA


34/49



bolted fault current at the point where the arc vault isconnected.

If available fault current is lower than 22kA, but higherthan 10kA the Arc Vault will still function but a fewadditional milliseconds may be required for full transfer.The TCC is not accurate in that range, but less than 1.2calories per square cm is still expected at 18.

Connection and requirements

The Arc Vault Protection System must be connectedwith 2000A rated cable (6-500MCM CU) using non-magnetic duct. Cable length may be up to 50 feet (15meters). Different cables may be used if the totalimpedance and total reactance is less than 50 feet of six500MCM CU conductors.

The Arc Vault Protection System uses 24VDC providedby an internal power supply. The power supply requirescontrol power in the 120-250V AC or DC range. For

reliability power may be provided from multipleseparately derived systems as long as the throw-over israted to operate in 300mS or less

The 5000A CTs may be connected up to 150 cable feetaway (300 loop) from the Arc Vault relay.

Line side disconnect device selection and control

The Arc Vault Protection System will sense current andimmediately operate a designated line side circuitbreaker to initiate fault current interruption. If the sensedvoltage exceeds the factory set threshold then it will alsoinitiate an energy transfer. A low voltage indicates a

collapsed system or a bolted fault condition. In eithersituation the arc vault will not be signaled to transferenergy.

The line side device (upstream) may be a low voltagemain or a medium voltage primary main for atransformer. Control power to operate the shunt trip,capacitor trip or other trip mechanism must be suppliedby the installer.

Back up. The installer may, at his option, installadditional overcurrent control or transfer tripping withcurrent sensing, delay or circuit breaker operation logicto operate another circuit breaker further upstream. The

GE Arc Vault Protection System has been tested tosuccessfully contain an arc in excess of 12 cycles toallow a second back up circuit breaker to operate ifdesired.

The controlled circuit breaker used to interrupt current tothe GE Arc Vault Protection System must bemaintained per the manufacturers recommendationsand ensured to be in proper working order at all times.

Protection Methodology

The Arc Vault Protection System works by sensingcurrent and voltage. Current above the user set thresholdcauses the Arc Vault Protection system to open thecontrolled circuit breaker. If the system simultaneouslysenses sufficient voltage to indicate that the high current iscaused by an arcing fault then the Arc Vault absorption istriggered to transfer the energy away from the arcingfault. Modern trip systems such as the EntelliGuard TUelectronic trip may also be provided with a temporaryinstantaneous setting caller RELT (Reduced Energy Let-Through) for GE, Maintenance Switch by othermanufacturers. This trip capability may be used asredundant back up protection for control of the circuitbreaker. Figure 6-3 is a simplified one line of the controlsystem controlling a low voltage substation main circuitbreaker. A similar system can be used to control a mediumvoltage circuit breaker on the transformers primary. Whencontrolling a Medium voltage main the Arc Vault must beconnected to the bus at the transformer secondary on theline side of the secondary main.

The Arc Vault should not be connected in such a mannerthat it cannot be disconnected from the source while thefaulted bus remains connected to any source. Any circuitbreaker that separates the Arc Vault from the sourceproviding fault current must also disconnect the sourcefrom the fault.

In In Figure 6-3 the Arc Vault controls the secondarymain. Figure 6-4 shows an implementation controlling theprimary main. Figure 6-5 implementation is incorrectbecause the controlled circuit breaker can disconnect thefaulted bus but the arc vault remains connected. Similarly,in Figure 6-6 the Arc Vault cannot be connected in such amanner that it can be disconnected from the faulted bus ifthe faulted bus can remain energized after the Arc Vault isdisconnected from the source.


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Figure 6-3 Low Voltage Main Protected System

MCB

Relay

BusCT

Arc Device

XFMR

OFFTESTON

1

2

86

Protected

Zone

MCB

Relay

BusCT

Arc Device

XFMR

OFFTESTON

1

2

86

Protected

Zone

Figure 6-4 Medium Voltage Device Protected System

52 AVRelay

Correct implementationto protect secondaryterminals &

downstream buses

52 AVRelay

Correct implementationto protect secondaryterminals &

downstream buses

Figure 6-5 Incorrect Medium Voltage Implementation

52

AV

Relay

Incorrect implementat ion toprotect secondary terminals

& downstream buses. AVmust be downstream ofcont rolled CB

52

AV

Relay

Incorrect implementat ion toprotect secondary terminals

& downstream buses. AVmust be downstream ofcont rolled CB

Figure 6-6 Incorrect Medium Voltage Implementation

52AV

Relay

Incorrect implementationbecause dedicated AV CB can

disconnect AV accidentallyduring an arc flash eventbefore the 52 device operates.

52AV

Relay

Incorrect implementationbecause dedicated AV CB can

disconnect AV accidentallyduring an arc flash eventbefore the 52 device operates.

In any application involving multiple sources such as adouble-ended substation an Arc Vault Protection Systemwill be required for each bus. Any automatic Throw-Over

(ATO) scheme should be disabled during Arc VaultProtection System operation whether the transition is openor closed. For more complex control implementations


36/49



contact GE Engineering Services for consultation prior toimplementation or system design.

CONFIGURATIONS

The following illustrations convey how the Arc VaultProtection System is applied to provide protection for an

existing lineup of switchgear. The illustrated applicationsare single-ended line-ups but double-ended line-ups andmulti-source line-ups are within scope of this product. TheArc Vault Protection System should not be applied for

closed transition and paralleling applications. AdditionalArc Vault Devices and Arc Vault Relays are required foradditional power sources i.e., two Arc Vault systems arerequired for a double-ended line-up.

The following configurations only convey typical orpossible applications of switchgear assemblies but do notdetail all possible combinations.

Configuration 1 Remote Located Stack w/ Arc Vault on Line side of LVPCB mains (CTs in Switchgear)

The current transformers (CTs) placement dictate which sections and/or primary bus is monitored for a fault level of currentassociated with an arc flash incident. See Operating Modes of Arc Vault Protection System on page 9 for details.

In this configuration, only areas highlighted in yelloware provided with protection as defined in Product Features on page24.

The lock-out relay (device 86 ) is wired in such a manner that the upstream circuit breaker can not be closed unless the lock-

out relay is manually reset by the user. Once the Arc Vault Device and target equipment is inspected/maintained and thelock-out relay is reset; the user can then close the upstream circuit breaker to restore power to the equipment.

This configuration assumes that there is only one power source for the load bus.

Figure 6-7 Single-ended (Radial) Application with Remote Arc Vault Stack

XFMR 1

ARC VAULT 1

BUS 1

SOURCE 1

86-1

MV 1

ARC

RELAY 1

MAIN 1

EVENT

PROTECTION

LINE PROTECTION

(RADIAL SYSTEM)

CT'S

INCOMING 1

ZONE

BUS 1 ZONE

LOW VOLTAGE

SWITCHGEAR

REMOTE ARC

VAULT STACK

MAIN 1 ZONE

REMOTE ARC

VAULT ZONE

Breaker tripping

contact

Not protected zo


37/49



Configuration 2 Remote Located Stack w/ Arc Vault on the Line side of the LVPCB mains (CTs not in Swgr)

The current transformers (CTs) placement, as shown outside the line-up, dictate which sections and/or primary bus ismonitored for a fault level of current associated with an arc flash incident. See Operating Modes of Arc Vault ProtectionSystem on page 9 for details.

In this configuration, only areas highlighted in yelloware provided with protection as defined in Product Features on page24.

The lock-out relay (device 86) is wired in such a manner that the upstream circuit breaker can not be closed unless the lock-out relay is manually reset by the user. Once the Arc Vault Device and target equipment is inspected/maintained and thelock-out relay is reset; the user can then close the upstream circuit breaker to restore power to the application.



XFMR 1

ARC VAULT 1

BUS 1

MAIN 1

SOURCE 1

86-1

MV 1

ARC

RELAY 1

EVENT

PROTECTION

LINE PROTECTION

(RADIAL SYSTEM)

CT'S

LOW VOLTAGE

SWITCHGEAR

REMOTE ARC

VAULT STACK

MAIN 1 ZONE

BUS 1 ZONEREMOTE ARC

VAULT ZONE


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Configuration 3 Remote Located Stack w/ Arc Vault on the Load side of the LVPCB mains

The current transformers (CTs) placement, as shown in stack 101, dictate which sections and/or primary bus is monitoredfor a fault level of current associated with an arc flash incident. See Operating Modes of Arc Vault Protection System onpage 9 for details.

In this configuration, only areas highlighted in yellow are provided with protection as defined in Product Features on page24.

The lock-out relay (86 device) is wired in such a manner that the upstream circuit breaker can not be closed unless the lock-out relay (86 device) is manually reset by the user. Once the Arc Vault Device and target equipment isinspected/maintained and the lock-out relay (86 device) is reset; the user can then close the upstream circuit breaker torestore power to the application.



XFMR 1

ARC VAULT 1

BUS 1

MAIN 1

EVENT

PROTECTION

LOAD PROTECTION

(RADIAL SYSTEM)

CT'S

LOW VOLTAGE

SWITCHGEAR

SOURCE 1

86-1

MV 1

ARC

RELAY 1

REMOTE ARC

VAULT STACK

INCOMING 1

ZONEMAIN 1 ZONE

BUS 1 ZONEREMOTE ARC

VAULT ZONE


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PRODUCT FEATURES

The Arc Vault Protection System is supplied to protecteither a new switchgear assembly or an existing installedswitchgear assembly:

The Arc Vault Protection System will be classified asLow Voltage Metal-Enclosed Switchgear per IEEEC37.20.1 with UL Listed label for third party verificationwhen applied within the following ratings:

o 480VAC phase to phase voltage

o 60Hz nominal frequency

o 22kAIC~65kAIC @ 480VAC

o When protected with an acceptable upstreamdevice as described in Medium Voltage (MV) or Low

Voltage (LV) Main Circuit Breaker Requirements onpage 8.

o Without the use of exhaust chimney or plenum

The Arc Vault Protection System when operated in Arc

Vault Relay & Arc Vault Device Mode provides a totaltransfer time as shown in the Blue curve in Figure 6-2.

The Arc Vault Protection System when operated in ArcVault Relay Mode provides a total clearing time asshown in Red in Figure 6-2.

ARC VAULT DEVICE REJECTION SCHEME

The Arc Vault Cassette has a unique rejection scheme asdetailed in Table 6-1 below. The rejection scheme willprevent an EntelliGuard G circuit breaker from rackinginto an Arc Vault Cassette and an Arc Vault Device from

racking into an EntelliGuard G circuit breaker cassette.

Table 6-1 Arc Vault Device Rejection Scheme

Device Position inthe cassette

PrimaryDisconnects

SecondaryDisconnects

Arc Vault FunctionalityArc Vaultdoorposition

CONNECTED Engaged EngagedArc Vault can be operated electrically.

Ready to transfer arcClosed

TEST Disengaged Engaged

Arc Vault device ready to test.

Control circuits operations can be testedand verified. Plasma gun can bedischarged

Closed

DISCONNECTED Disengaged DisengagedLocked out during transition, Safe formaintenance when fully disconnected.

Closed

WITHDRAWN Disengaged DisengagedArc Vault can be removed from thecompartment. Safe for maintenance.

Open


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CURRENT AND POTENTIAL TRANSFORMERS

The Arc Vault Protection System is compatible with theCTs provide a 5A secondary output. CTs can be locatedwithin the circuit breaker compartment, the breakerrunbacks, bus compartment or external from theswitchgear to be protected but within the component andtechnical limits.

The CTs are rated 5000/5A and are solid core design only.


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Arc Vault DEH-41484Physical Data


SECTION 7. PHYSICAL DATAARC VAULT STACKS

The Arc Vault Stack consists of unique riser codes or stackconfigurations that will support the applications detailed intheApplication Data section.

Arc Vault Stack details

Vertical section of AKD-20 switchgear comprised of a24 wide, 78 high and 48 deep stack design.

Contains one Arc Vault Device Cassette or Arc VaultFuture Cassette and sub-assemblies in the Bcompartment.

Free-standing section of unique AKD-20 switchgeardesign. No special transition section or close coupling isnecessary.

Indoor construction only containing one 2000A cable

tap off assembly allowing either top or bottom entry forcustomer cables.

May or may not contain the Arc Vault ProtectionSystem control components such as Arc Vault Relay,Indicating Lights, etc.

Requisition engineer defined assembly specific for eachapplication within component and technical limits.

Provided with 3 high compartment construction only (Acomparment = 28 high ; B & C comparment = 21 high).

Arc Vault Cassette is provided with a shutter assemblyas standard.

Auxiliary door containing Arc Vault Relay is providedwith a device barrier as standard.

Bolted Left and Right (split panels from front to rear)access covers (attaching hardware does not usetaptites).

Bolted Rear Access (single panel) access cover (attachinghardware does not use taptites).

Product Dimensions

The Arc Vault Protection System is 24 wide by 48 deep by78 high and requires 12 of floor to ceiling clearance. Thestack weight is approximately 2050 lbs.


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DEH-41484 Arc VaultStandards and References


SECTION 8. STANDARDS AND REFERENCES UL1558 Metal-Enclosed Low-Voltage Power CircuitBreaker Switchgear

APPLICABLE DOCUMENTS IBC 2006 International Building Code, 2006.

The documents below shall be used as additionalspecifications. IEEE 1584 Guide for Performing Arc Flash Hazard

Calculations

ANSI C37.13,16,17, & 50 Low-voltage AC Power CircuitBreakers ANSI Z535 Safety Alerting Standards

ARC VAULT ACTIVATION SWITCH ANSI C37.20.1 Metal-Enclosed low-Voltage Power CircuitBreaker Switchgear The Arc Vault Activation (ACT) switch must be turned on to

energize the Arc Vault Protection System. The location ofthe Activation switch and its indicating lights are at the topof the Arc Vault stack in the right corner. See Figure 8-1.

ANSI C37.51 Metal Enclosed Low -Voltage Power CircuitBreaker Switchgear Assemblies Conformance test

ANSI C37.90 Standard for Relay Systems Associated withElectric Power Apparatus

Figure 8-1 Arc Vault Activation (ACT) Switch

SystemActivationSwitch


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Arc Vault DEH-41484Standards and References


ARC VAULT PROTECTION SYSTEM LABELS

The following labels will be applied to the Arc Vault Stack.

Activiation (ACT) Tray Label See Figure 8-2. Label placednext to ACT switch to inform user on the switch positions.

Figure 8-2 ACT Tray Label

Activation (ACT) Warning Label See Figure 8-3. Labelplaced on Arc Vault Device compartment door just belowlocation of ACT switch in instrument tray.

Figure 8-3 ACT Warning Label

Activation (ACT) Control Power / Storage Warning Label See Figure 8-4. If the control power for the Activation (ACT)switch circuit is protected by a fuse block or otherdisconnecting means in the Arc Vault Stack, then this labelis applied next to this disconnecting device in theequipment. Only one label is provided and applied to theclosest disconnecting device to the ACT control circuit.

Figure 8-4 ACT Control Power Warning Label

CODE/AGENCY REQUIREMENTS

The Arc Vault Protection System has an optional UL labelconfirming compliance to IEEE C37.20.1, UL1558 andapplicable sections of C37.20.7.


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DEH-41484 Arc VaultQuick Specification Guide and Installation


SECTION 9. QUICK SPECIFICATION GUIDEAND INSTALLATION

SPECIFICATION CLAIMS

The GE Arc Vault Protection System will transfer energy in7 milliseconds or less when applied within recommendedguidelines. An arcing fault will be extinguished within thesame time. contain an arc fault in less than 8ms, IncidentArc Flash energy at the arcing fault point will be reducedbelow 1.2 calories at 18 working distance based on IEEE1584-2004 calculations. resulting in incident energy inaccordance with IEEE 1584 at 18 from the arc event atless than 1.2 Cal/cm2, with the circuit breakercompartment doors open, in a 480V 65kAIC system.

The GE Arc Vault Protection System for low voltageequipment reduces building construction costs because itdoes not require exhaust chimneys or plenums to directthe arc flash energy outside of the building, when

compared to traditional arc resistant switchgear.If an arc flash incident occurs during maintenanceat theprotected switchgear, the low-voltage switchgear can beoperational again within a working day assumingappropriate replacement parts are available, whichimproves your overall system uptime when compared totraditional arc resistant switchgear.

The GE Arc Vault protection system reduces the energyflowing through the system by 60% or more compared toa bolted fault that would occur with a crowbar system. Theenergy reduction will lower the stress on other systemcomponents such as transformers, circuit breakers, and

bus bar construction and improve your overall systemuptime when compared to tradition