8dh10 presentation 200810 en · 2012-07-10 · 8dj10/20 8dh10 simosec 8dab10 nx plus nx plus c...

8DH10Maintenance-free for lifetime

October 1st 2008 Energy Sector / E D MV 28DH10

© Siemens AG 2008

Energy Distribution

Welcome!


© Siemens AG 2008

Main Applications for Medium-Voltage Switchgear

Power transmissionHigh and extra-high voltage > 72kV

Primary distribution levelMedium voltage up to 40.5kVup to 40kA (3s)

Secondary distribution levelMedium voltage up to 24kVup to 25kA (1s)

Distribution levelLow voltage < 1kV

8DJ10/20 8DH10 SIMOSEC

8DAB10 NXPLUS NXPLUS C

Power generationPower stations

G

x xx xxx xx x

x


© Siemens AG 2008

Content

� Overview

� Technical Data

� Typicals, Product Range

� Panel Design• Panels Type RK, TR, LS, ME• Busbar• Operation• Metering• Low-Voltage Compartment• Cable Connection• Interlocks

� Classification According to IEC 62 271-200

� Customer Benefit


© Siemens AG 2008

Technical Features

� Up to 17.5 kV, 25 kA, up to 1250 A busbar,630 A feeders

� Up to 24 kV, 20 kA, up to 1250 A busbar,630 A feeders

� Factory-assembled, type-tested switchgear according to IEC 62 271-200

� Metal-enclosed

� Single busbar

� Gas-insulated

� Sealed


© Siemens AG 2008

Customer Benefit

� Environmental independence

� Compactness

� Maintenance-free design

� Personal safety

� Operational safety, reliability

� Economy, ecology


© Siemens AG 2008

General Information

� Market introduction in April 1993

� Successful operation in approx. 80 countries until today

� The gas-insulated switchgear for application in nearly all sectors like Airports & Ports Automotive Buildings

Cement Industries Chemicals & Pharma ContractorsFood & Beverage General Industries HealthcareMining Offshore Industries Oil & GasPaper Industries Semiconductor Steel & Aluminium Utilities Transportation & Railways Windfarms

� More than 114,000 panels 8DH (at the end of 2008) delivered

� Our experiences are based on more than 565,700 delivered gas-insulated switchgear 8DJ and 8DH


© Siemens AG 2008

Technical Data

630up to ARated normal current for feeders

20

20

25

20

25

20

25

20

25

20

up to kA

up to kA

Rated short-time withstand current, 1 s

3 s

Standard: 630Option: 1250 A **

up to ARated normal current for busbar

20

50

50

125

50

50/60

24

25

63

63

95

38

50/60

17.5

25

63

63

95

36

50/60

15

25

63

63

75 *

28 *

50/60

12

Secondary part

IP65

IP3X

Degree of protection Primary part (main circuit)

200ARated normal current for transformer feeders

25up to kARated short-circuit breaking current

63up to kARated short-circuit making current

63up to kARated peak withstand current

60kVRated lightning impulse withstand voltage

20kVRated short-duration power-frequency withstand voltage

50/60HzRated frequency

7.2kVRated voltage

* 42 kV / 95 kV according to some national requirements** not for panel Type „ME1“


© Siemens AG 2008

Overview of TypicalsRing-Main Panel Type RK

Type RK

Transfer

Options:

Feeders

Panel width: 350 mm

Standard Type RKfor double cables

Type RKfor surge arresters

Type RK-Ufor transfer

More panel types available: RK1Panel width: 500 mm


© Siemens AG 2008

Overview of TypicalsRing-Main Panel Type RK1

Panel width: 500 mm

Options:

Feeders

Standard Type RK1 Type RK1for double cables

Type RK1for surge arrest.

Type RK1with volt. transf.

Type RK1-Ufor transfer

Transfer


© Siemens AG 2008

Overview of TypicalsTransformer Panel Type TR1

Type TR1 Type TR1-V Type TR1/V Type TR1-U

Transfer

Options:

Feeders

Panel width: 500 mm

Standard


© Siemens AG 2008

Overview of TypicalsCircuit-Breaker Feeder Type LST1

Panel width: 500 mm, overall height: 1400 mm

Options:

Feeders

Type LST1 Type LST1for double cables

Type LST1for surge arresters

Type LST1with voltage transf.

Standard


© Siemens AG 2008

Overview of TypicalsCircuit-Breaker Panel Type LS1

Type LS1

Transfer

Options:

Feeders

Panel width: 500 mm

Standard Type LS1for double cables

Type LS1for surge arrest.

Type LS1with volt. transf.

Type LS1-Ufor transfer


© Siemens AG 2008

Overview of TypicalsCircuit-Breaker Panel Type LS2/LS1 V

Type LS2/LS1 V

Transfer

Options:

Feeders

Panel width: 500 mm

Standard Type LS2for double cables

Type LS2for surge arrest.

Type LS2with volt. transf.

Type LS2-Ufor transfer


© Siemens AG 2008

Overview of TypicalsCable Panel Type K

Standard Type K

Transfer

Options:

Feeders

Panel width: 350 mm

Type Kfor double cables

Type Kfor surge arresters

Type K-Ufor transfer


© Siemens AG 2008

Overview of Typicals - Bus Sectionalizerwith Circuit-Breaker Type LK/LT1, with Switch-Disco nnector Type LT2

Type LK-VType LK Bus sectionalizer type LT2with switch-disconnector

Bus sectionalizertype LK/LT1with vacuum CB

Options:

Panel width: 500 mm


© Siemens AG 2008

Overview of TypicalsPanel Blocks with Ring-Main Feeders Type RK

Type R-B2 Type R-B3

Width of panel block:700 mm 1050 mm


© Siemens AG 2008

Overview of TypicalsPanel Blocks with Transformer Feeders Type TR

1500 mm

Type T-B2 Type T-B3

Width of panel block:1000 mm


© Siemens AG 2008

Overview of TypicalsPanel Blocks with RK and TR Feeders

1050 mm

Type RT-B2 Type 2RT-B3



© Siemens AG 2008

Overview of TypicalsPanel Blocks with K, RK and TR Feeders

1400 mm

Type KT-B2 Type 3RT-B4



© Siemens AG 2008

Panel blocktype R LST–B2(1RK + 1LST )

Panel blocktype K(E) LST–B2

(1K + 1LST)

Overview of TypicalsCircuit-Breaker Feeder Type LST (up to 24 kV)

Panel blocktype 2R LST–B3(2RK + 1LST )

Panel block type 3R LST–B4(3RK + 1LST )

1400 mm 1050 mm Width of panel block:700 mm 700 mm


© Siemens AG 2008

Overview of TypicalsBilling Metering Panel Type ME1, Air-Insulated

Standard Type ME1-KS Type ME1-KK

For cast-resin insulated transformers

Options:

ME1 with cable connection

Panel width: 850 mm


© Siemens AG 2008

Overview of TypicalsBilling Metering Panel Type ME2, Air-Insulated

Standard

For combined transformers, metal-enclosed

For panel combinations, e.g. with LK/LT1, LT2, directly with standard busbars

Panel width: 650 mm


© Siemens AG 2008

Panel Design Ring-Main Panel Type RK

Hermetically weldedstainless-steel vessel

Busbar(outside cone 630 A)

Pressure-relief

Three-position switch-disconnector

Option: Low-voltage compartment(height 600 mm or 900 mm)

Operating mechanism for three-position switch

Cable connection with bolted contact (outside cone 630 A)

Panel depth: 775 mm


© Siemens AG 2008

Panel Design Transformer Panel Type TR

Fuse assemblyFuse replacement:Without tools

Option: Low-voltage compartment(height 600 mm or 900 mm)

Operating mechanism for three-position switch


Pressure relief

Hermetically weldedstainless-steel vessel

Three-position switch-disconnector

Cable connection with plug-in contact (outside cone 200 A)

Panel depth: 775 mm


© Siemens AG 2008

Panel DesignCircuit-Breaker Feeder Type LST1

Panel depth: 825 mm

deeper by + 50 mm:

Cable compartment cover (according to make and type of cable plug)

Panel depth: 775 mm

Standard (LS1) :


© Siemens AG 2008

Panel Design Circuit-Breaker Panel Type LS1, LS2/LS1 V

Circuit-breaker operating mechanism

Current transformer- as three-phasecurrent transformer

- as cable-type current transformer

Option (LS2/LS1 V):With plug-in voltage transformers

For busbar(type 4MT3)

For cable feeder(type 4MT8)


Circuit-breaker with vacuum interrupter

Panel depth: 775 mm

Standard (LS1) :


© Siemens AG 2008

Panel Design Billing Metering Panel Type ME1, Air-Insulated

Voltage transformer set for billing metering

Niche, e.g. for terminals

Busbar connection to adjacent panels

Option: Low-voltage compartment (height 600 mm or 900 mm)

Current transformer set for billing metering

Cover for connection compartment(screwed on)

Panel depth: 775 mm

� Use of cast-resin insulated billing metering transformers

� Transformers for customer-specific key data or customer-supplied

� Insulated busbar connection, rated normal current: 630 A

� Additional climatic test according to IEC 60932 Report (design class 2)


© Siemens AG 2008

Panel Design Billing Metering Panel Type ME2, Air-Insulated

Panel depth: 775 mm

� Use of billing metering transformers (current, voltage), metal-enclosed

� Transformers for customer-specific key data

� Busbar system insulated or screened,rated normal current: Up to 1250 A

� System-conforming application in 8DH

Voltage transformer set for billing metering


Current transformer set for billing metering Cover for

connection compartment(screwed on)

Option: Low-voltage compartment (height 600 mm or 900 mm)


© Siemens AG 2008

Busbar Insulated System

� Silicone-rubber insulated, resistant to ageing and UV,safe-to-touch due to metal enclosure

� No gas work at site,i. e. fast switchgear extension or replacement

� Fast availability


© Siemens AG 2008

Busbar Screened System

� Silicone-rubber insulated, screened,resistant to ageing and UV,safe-to-touch due to metal enclosure

� Insensitive to pollution and condensation

� No gas work at site,i. e. fast switchgear extension or replacement

� Fast availability

� Use of bus-type current transformers possible (option)


© Siemens AG 2008

BusbarSilicone-Rubber Insulation: Properties

� Very good insulating capacity: >20 kV/mm

� Temperature-resistant: -50°C up to +180°C

� Resistant against ozone, UV-radiation and humidity

� No conductive residues after discharges

� Flame-retardant, no toxic combustion products

� Proven for decades as sealing end and HV insulator


© Siemens AG 2008

BusbarDesign

Busbar insulationmade of silicone rubber

Cross adapter

Bushing

Stopper

Contact shell

Busbar(round-bar copper)

End adapter

Switchgear vessel


© Siemens AG 2008

BusbarUnder Water Test of Silicone-Rubber Insulated Busba r

� Screened busbar

� Rated voltage Ur = 24 kV

� Partial discharge (PD) test before and after high-voltage test

� High-voltage test at 30 kV for 24 hours

� Water pressure 100 hPa relative pressure (equal to 1 m depth of immersion)

� No disruptive discharge occurred

� PD tests were passed successfully, no difference in PD rate before and after the high-voltage test


© Siemens AG 2008

Busbar connection: 630 A

BusbarIn Billing Metering Panel Type ME1, Air-Insulated

Voltage transformer

Current transformer

Busbar, insulated version



© Siemens AG 2008

Operation of Three-Position Switch in RK and LS Feeders

Ready-for-service indicator

Actuating opening forearthing switchOption:

Short-circuit indicator

Switch position indicatorfor earthing switch

Switch position indicatorfor switch-disconnector

Option:Locking device

Type plate

Interlock of cable compartment cover

Actuating opening forswitch-disconnector

Capacitive voltage detecting system (plug-in)


© Siemens AG 2008

Operation of Three-Position Switch in TR Feeders


Actuating opening forearthing switch


Switch position indicatorfor switch-disconnector


Type plate


Actuating opening forswitch-disconnector


Interlock for HV HRC fuse assembly


© Siemens AG 2008

Operation of Circuit-Breaker Panel Type LS…


Switch position indicator for circuit-breaker

“Spring charged” indicatorfor circuit-breaker

Opening for charging thecircuit-breaker spring by hand

Operating cycle counter for circuit-breaker

Option: Locking device

Option:Capacitive voltage detectingsystem for busbar or short-circuit indicator

ON pushbutton (mechanical)for circuit-breaker

OFF pushbutton (mechanical)for circuit-breaker

Switch position indicator for:- earthing switch- switch-disconnector

Capacitive voltage detecting system for feeder

Actuating opening for:- switch-disconnector- earthing switch


Option: Interlock to three-position switch


© Siemens AG 2008

Operation of Disconnecting Circuit-Breaker (LST) in LST Feeders



Actuating opening forcircuit-breaker

Actuating opening forearthing switch


Switch position indicatorfor circuit-breaker


Indications:“CLOSED”“OPEN”“Circuit-breaker tripped”


© Siemens AG 2008

Current Transformers, Current Measurement

Ring-core current transformers

� Main circuit as primary part without dielectric and thermal problems

� Free of dielectrically stressed cast-resin parts (due to design)

� Climate-independent

� Secondary part accessible outside the enclosure without danger

For feeder: For busbar:

On the cable as cable-type current transformer

On the bushing as three-phase

current transformer

On the busbar (screened) as bus-type current transformer


© Siemens AG 2008

Current Transformer Designs for Feeders

Three-phase current transformer� For circuit-breaker panels

- as feeder or - for transfer

� Type 4MC63: Standard: 150/1 A or 400/1 A� Rated continuous thermal current ID: 630 A

Cable-type current transformer� For all cable feeders� Type 4MC70

Common Features� Protection transformers for digital protection systems (option: measuring core)� Climate-independent� Ring-core transformers – free of dielectric stress


© Siemens AG 2008

Voltage Transformer Arrangement, Voltage Measuremen t

� For panel width 500 mm

� Plug-in voltage transformers

� Single-pole insulated

� Metal-enclosed, climate-independent

� For feeder: LS1, LS2, RK1

� For busbar: LS1, LS2, RK1

� Busbar voltage metering panels: ME3, SE2


© Siemens AG 2008

Voltage Transformers, Voltage Measurement

� For panel width 500 mm

� Plug-in type, on bushings

� Climate-independent

� Arranged safe-to-touch due to metal cover

� Metal-enclosed

Type 4MT3 Type 4MT8

� Inside-cone system� For busbar connection

(arranged on the switchgear vessel)

� Metal-coated

� Outside-cone system� For cable connection

(deep cable compartment cover)� Metal-enclosed


© Siemens AG 2008

Transformer Protection with Fuses

� Switch disconnector/fuse combination offers optimum short-circuit protection(acc. to IEC 62271-105):

• Fast shutdown ≤ 10 ms• Current limitation reduces stress• Cost-efficient

� Considerations• Fuses are consumables• Stock-keeping• Transformer size

� Selection table for fuses and transformer available (Catalog HA 40.1)


© Siemens AG 2008

Transformer Protection with Circuit-Breaker

Circuit-breaker design:

Circuit-breaker with disconnecting function as three-position switch

(acc. to IEC 62271-100, T100s)

� For transformer ratings ≥ 0.8 MVA / 7.2 kV

≥ 1.25 MVA / 12 kV≥ 1.25 MVA / 13.8 kV

≥ 1.6 MVA / 20 kV

otherwise: HV HRC fuses

� Cost-efficient at high transformer ratings

� Protection relay, with or without auxiliary voltage supply

� Simple standardized solutions, for complete typicals


© Siemens AG 2008

Circuit-Breaker with Disconnecting Function (LST)

Circuit-breaker CLOSED – OPEN Switching duties

Disconnector function OPEN Establishing the i solating distance

Earthing switch EARTHED Earthing the feeder

Definition for feeder / panel: Circuit-breaker with disconnecting function LST(German: Leistungsschalter mit Trennfunktion (=LST)or disconnecting circuit-breaker

Ideal economic solution: 3 functions in one device


© Siemens AG 2008

Circuit-Breaker with Disconnecting Function (LST) Design and Switching Principle

For example: 8DJ20 switchgear

Example: Section “LST feeder” from: 8DJ20, scheme 10 (2RK + 1LST),overall heights (mm): 1200 / 1400 / 1760

Busbar, with CLOSE contact

Earthing contact

Deflection for operating rocker and circuit-breaker shaft

Arc-suppression coil system: Insulating and quenching gas SF6Function acc. to "Lorentz force” ( I � B� F� v),Extinction during current zero

Switching blade

Arc-suppression coil

Busbar, with CLOSE contact

Earthing contact


© Siemens AG 2008

Low-Voltage Compartment

� Height : 600 mm (standard)900 mm (option)

� Standard for circuit-breaker panels, option for other panel types (depending on customer-specific requirements)

� Bus wires and control cables plugged in (via 6 or 10-pole coded module plug connectors)

� Circuit-breaker panels: Panel control via conventional control devices or digital bay controller

� Customer-specific secondary equipment

� Wiring in H07VK (standard), options possible


© Siemens AG 2008

Low-Voltage Niche in Metering Panel Type ME1

� Niche inside the panel

� With metallic partitions towards the transformer connection compartment

� Suitable for terminals and/or secondary fuses


© Siemens AG 2008

Panel Connection, Cable Connection

� Bushings with outside cone (EN 50 181)

� Cable feeders (RK, LS): With bolted contact M16 (630 A), interface type “C”

� Transformer feeders: With plug-in contact (200 A), interface type “A”(cross-section up to 120 mm2)

� Maintenance-free due to welded bushing

� Circuit-breaker panels:Current transformer on bushing, factory-assembled as three-phase current transformer

Ring-main feeder,as-delivered

Circuit-breaker feeder,examples for cable plugs


© Siemens AG 2008

Cable Connection:Panel Types RK, LS, K, LST in Panel Blocks

Options for feeders (e.g. LS1, LS2, RK, RK1, K)

� With cable compartment cover flush with operating front depending on make and type of cable plugs

� Deep cable compartment cover:for other cable plugs (depending on manufacturer/type) for plug-in feeder voltage transformer

2 cables (K+K): 1 cable + 1 surge arrester (K+Ü):

� Bushing with outside cone (bolted contact)

� Access only with feeder earthed

Standard


© Siemens AG 2008

Feeder Earthing

� Make-proof earthing with the three-position switch by switching to “EARTHED” position

� No interlocks required (option: for circuit-breaker panels)

� Only in “EARTHED” position Opening of cable compartment

� Standardized operating concept for all panels

� Option: Locking device

EARTHED

OPEN

CLOSED


© Siemens AG 2008

Cable Testing without Removing the Cables

Measuring bolt

Insulating cap

� Cable test with - DC voltage- AC voltage

� Maximum values of test voltage *:- for Ur 12 kV: = 48 kV VLF 0.1 Hz ~ 19 kV- for Ur 24 kV: = 70 kV VLF 0.1 Hz ~ 38 kV

� Three-position switch and circuit-breaker in OPEN position

� Full operating voltage possible at the busbar

� If required, remove voltage transformers!

* Observe recommendation and maximum values of cable or cable plug manufacturers


© Siemens AG 2008

Interlocks (Selection)

Interlocks are designed according to IEC 62 271-200

Standard interlocks

� Three-position switch-disconnector against earthing switch – mechanical� Cable compartment: Only accessible with “feeder earthed”� HV HRC fuse replacement: Only accessible with “feeder earthed” (TR panel)

Additional interlocks (option)

� Circuit-breaker panel: Circuit-breaker against three-position switch-disconnector (mechanical)

� Locking devices for three-position switch� Closing lock-out: Prevents switching the three-position switch-disconnector from

“OPEN” to “CLOSED” when the cable compartment cover is removed� De-earthing lock-out in TR panel: Prevents “de-earthing” the three-position switch-

disconnector (switching from “EARTHED” to “OPEN”) when the cable compartment cover is removed


© Siemens AG 2008

Classification According to IEC 62 271-200

Partition class: PM

Loss of service continuity category:� Panels with HV HRC fuses: LSC 2A� Panels without HV HRC fuses: LSC 2B

Accessibility of compartments:� Busbar compartment: tool-based � Switching-device compartment: non-accessible� Low-voltage compartment (option): tool-based� Cable compartment for panels

• without HV HRC fuses: interlock-controlled• with HV HRC fuses: interlock-controlled

Internal arc classification:(Option acc. to IEC 62 271-200) 7.2 kV to 24 kV

� Wall-standing arrangement: IAC A FL 21 kA 1 s� Free-standing arrangement: IAC A FLR 21 kA 1 s


© Siemens AG 2008

Customer Benefit

� Environmental independence

� Compactness

� Maintenance-free design

� Personal safety

� Operational safety, reliability

� Economy, ecology


© Siemens AG 2008

Environmental Independence

Our solutionWelded without seals,no diffusing humidity

Stainless-steel vessel,long-time corrosion-resistant

Laser-cut, laser-welded materials,exactly fitting quality

Welded stainless-steel metal bellows,for transmission of operating power

System-conforming, shock-proof connection systems

Integral, highly sensitive leakage detection system in the factory,sealed for life

Non-contact and non-sealed transmission of capacitive voltage detecting system

Your benefitInsensitive to aggressive environments (salt water, tropical areas, dust, humidity, chemical pollutants),no oxidation of contacts and bolted joints, no condensation,no pollution layers on insulators, no resinifying grease

Continuous insulation quality

No ingress of foreign bodies, small animals

Independent of site altitudewith the corresponding options


© Siemens AG 2008

Compactness

Our solutionSF6-insulation,compact construction

Panel blocks with up to 4 feeders

Combined disconnector and earthing switch,compact switch design

User-friendly cable connection height

SIPROTEC bay controller: Digital control, interlocking and protection system,compact secondary systems with high functional density

Your benefitMinimum space requirements, building volume saved: Up to 38 % at 12 kV, 43 % at 24 kV, efficient use of existing rooms, reduced volume for new constructions, compact design reduces transport and installation costs to a minimum

No accessible cable basement required

Economic use of space in urban areas,installation in conurbation, load centres to minimize transmission losses


© Siemens AG 2008

Maintenance-Free Design

Our solutionHermetically welded stainless-steel enclosure,stable, defined environmental conditions within the vessel

Maintenance-free switching devices and operating mechanisms,no adjustment and lubrication

Insulated busbar,insulated or screened (option)

Enclosed cable plugs,screened, independent of the environment

Suitable transformer designs,ring-core current transformers, metallic voltage transformers

Your benefitNo gas work during installation or extensions,no repeated SF6-training required for personnel

Maximum reliability of supply and availability,no shutdowns for maintenance

Sealed for lifetime(according IEC 62 271-200 and IEC 60694 / 5.15)

No maintenance costs,minimized operational costs

Highly economic investment


© Siemens AG 2008

Personal Safety

Our solutionHermetically welded enclosure

Internal arc classified according to IEC 62 271-200 for 1 s (option)

Logical mechanical interlocks

Capacitive voltage detection system

Make-proof earthing throughthree-position switch disconnector or three-position disconnecting circuit-breaker

Your benefitTouching of live parts excluded,extremely high degree of protection of the primary part

Accidental opening of vessel excluded

Access to switching devices not required due to maintenance-free design

Maloperation excluded

Verification of safe isolation from supply without opening the enclosure

Simple, standardized operating concept


© Siemens AG 2008

Operational Safety, Reliability

Our solutionHermetically welded enclosure, welded stainless-steel metal bellows

Current transformers outside the vessel

Plug-in voltage transformers,metal-coated (screened), metal-enclosed in the connection compartment

Plug-in busbar

Modular design

Minimum use of insulating material

Type and routine tests, quality management

NC production processes

Partition class PM

Your benefitIndependent of the environment, maintenance-free,no condensation, no oxidation

No dielectric and dynamic stress for current transformers

Fast transformer replacement possible

Easy installation and extension without gas work,short shutdown time for extensions or panel replacement

Easy and fast panel replacement

Reduced fire load

MTBF (16,771 years at the moment)


© Siemens AG 2008

Economy, Ecology

Our solutionMaintenance-free switchgear

Compact constructionindividual panels, panel blocks

Economic production

SF6 only used in hermetically sealed pressure system

100 % SF6-recycling by means of special tools

Identified, recyclable insulating material

Listing of all materials used

Your benefitMinimized operator expenses, high availability

Reduced transport costs

Minimum requirements regarding the building

Minimized transmission losses by installation in load centres

Reliable, calculable disposal


© Siemens AG 2008

8DH10 Switchgear Typical Application Examples

8DH distribution switchgear 8DH in a packaged substation


© Siemens AG 2008

Reference: Funiculars 8DH10 Switchgear: Sulden Funicular

Ortler Skiarena –South Tyrol

Sulden funiculars 1900 – 3250 mpower supply for one of Europe’s highest funiculars

Date of delivery: 2002

Number of panels: 5With gas-insulated medium–voltage switchgear type 8DHThe appropriate answer for secondary distribution systems

• Up to 24 kV, up to 36 A, up to 25 kA

• Freely configurable• Climate-independent• Maintenance-free• Compact and flexible

Safe and economic take-off withmost modern technology


© Siemens AG 2008

MTBF

The term major failures and minor failures are taken from the CIGRE publication of the work group 13.06 “Reliability of High Voltage Switchgears”.

Definition:

� MTBFMeantime between failure

� Major failure (MF)Complete failure of a panel which causes the lack of one or more of its fundamentalfunctions.NOTE: A major failure will result in an immediate change in the system operating e.g. the backup protective equipment being required to remove the fault, or will result in mandatory removal from service for non scheduled maintenance (Intervention required within 30 minutes).

� Minor failure (mF)Failure of a panel other than a major failure or any failure, even complete, of a constructional element or a sub-assembly which does not cause a major failure of the panel.

� MTTFMeantime to failure


© Siemens AG 2008

8DH10, the gas-insulated switchgear up to

17.5 kV, 25 kA, up to 1250 A busbar, 630 A feeders24 kV, 20 kA, up to 1250 A busbar, 630 A feeders

Thanks for your attention.

8dh10 presentation 200810 en · 2012-07-10 · 8dj10/20 8dh10 simosec 8dab10 nx plus nx plus c...

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