firefighter switch with arc fault detection pvsec--af · pdf filel ease of project planning...

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Firefighter Switch with Arc Fault Detection PVSEC-...-AF...

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Description

Technical Data

The term firefighter switch indicates a remotely controllable DC Disconnect with which the DC side of a photovoltaic system in proximity of the mod-ules (or directly below the cable outlet) can be disconnected. The discon-nection of DC lines within a building ensures maximum safety for persons. The integral arc fault detection with UL 1699B approval allows detection of hazardous DC arc faults in the PV system and immediately trips the DC Disconnect by means of the low voltage trip module. Disconnection of the circuit helps to extinguish serial arc faults already before any safety-critical situations can arise. DC arc faults can be caused by defective components such as connectors, cables, PV modules and junction boxes due to ageing, animal bite, heavy snow-fall or mounting and installation errors. The integral arc fault detector now allows realisation of fire prevention in photovoltaic systems. Remote disconnection and reconnection provide ease of reset and thus high system availability even in large roof-mounted solar installations.In normal operating condition, the system will automatically re-start after an inadvertent shutdown, e.g. due to a brief supply voltage dip.The E-T-A technology of arc fault detection significantly enhances the safety of photovoltaic systems.

US patent number: US 8,742,828 B2US patent number: US 8,766,760 B2 (Fail-Safe-Element)US patent number: US 8,929,038 B2

Features and Benefits

Typical applications

Standards Approvals

l Ease of project planning through perfectly aligned functions integrated into a compact unit with UL 1699B approval

l 1- or 2-pole devices to meet all international installation standards

l Automatic disconnection upon arc fault detectionl Remote ON/OFF operation by means of zero voltage release

module and motor actuation l Fast disconnection by undervoltage release in the event of

DC24V supply interruption (e.g. by an emergency stop or disconnection of the AC mains voltage)

l Automatic re-start after inadvertent trip in error-free system conditionl Lock-out feature for OFF condition (master-slave-principle)l Integral fail-safe functionl Integral auxiliary contacts

l Fire prevention through active and permanent arc fault detection on the DC side

l DC disconnection in roof-mounted solar installationsl Supporting measure to ensure protection of life and health during

firefighting or technical aid thanks to the firefighter switch functionl Installation is in distribution boxes

Standard Rated voltage Current rating range

IEC/EN 60947-3: DC 1,000 V up to 30 A

UL 1699B DC 1,000 V up to 30 A

Technical data Firefighter Switch with Arc Fault Detection Type PVSEC-...-AF...

Rated operational voltage (UE)

DC 1,000 V

Rated current (IE) up to 30 A

Number of poles 1 and 2 pole

Internal resistance < 10 mΩ

Rated insulation voltage (UI)

DC 1,500 V

Rated impulse withstand voltage (Uimp)

8 kV

Pollution degree 2

Overvoltage category III

General Characteristics

Fail-safe element integral

Connection load circuit:Terminal design:Tightening torque:Conductor material:Cable cross section:

wire stripping length

M4 slotted screw1.2 Nmcopperrigid and multi-stranded: 0.5 mm – 16 mm2

flexible with wire end ferrule: 0.5 mm – 10 mm2

flexible with TWIN wire end ferrule:0.5 mm – 6 mm2AWG 20 – 610 mm

Authority Standard Voltage ratings Current ratings

UL UL 1699 (B) DC 1000 V 30 A

Approval as UL 1699B PV DC Arc Fault Detector (AFD) type 1 with integral interrupting device. Only for type ...-AF1, 1 pole version.

Compatibility with rectifiers

This product was tested in combination with various rectifier models. For detailed information and a current release list please visit www.e-t-a.de and Products -> DC Disconnects & Arc Fault Detectors -> PVSEC-...-AF... -> Downloads


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Technical Data Technical Data

Technical data Remote Control, Zero voltage release module and Arc fault detection module for type PVSEC-...-AF...

Rated operational voltage

DC 24 V

Rated insulation voltage DC 32 V

Voltage range DC 20…26,4 V

Closed current typically 100 mA

Auxiliary circuit DC 24 V; 0.3 A

Terminal design spring-loaded terminals

ON duty 50 % / 60 sec.

Terminal design of auxiliary circuit:(auxiliary contact, DC 24 V supply voltage) Terminal type push-in (screwless) Conductive material: copper Cable cross section: rigid H05(07) V-U multi-stranded H07 V-R flexible H05(07) V-K flexible with wire end ferrule:

0.25 mm – 1.5 mm2

wire end ferrule with plastic collar: 0.25 mm – 0.75 mm2

AWG 24 – 16stripping length 8 mm

Auxiliary contact

l ON condition:

l OFF condition:

l Pre-warning low voltage of external supply voltage

l Pre-warning overvoltage of external supply voltage

1 change-over contact DC 24 V 0.3 A

contacts 14 and 11 are closed

contacts 12 and 11 are closed

< DC 20 V: terminal 11 is repeatedly interrupted (until low voltage release)

> DC 28 V: terminal 11 is repeatedly interrupted

Technical data of entire system type PVSEC-...-AF...

Utilisation category DC-21 B

Trip time to ON position

typically 4 sec

Trip time to OFF position(to UL 1699B)

< 0.8 sec

Typical life (number of cycles) at IEIEC 60947-3 300 at load 1700 at no load 120 per hourUL 1699B 2 x 1000 6 per min.

Making and breaking capacity (overload)IEC 60947-3 45 AUL 1699B 60 A

Short circuit making capacity IEC60947-3 (Icw = lcm)

400 A

Short circuit test to UL 1699B

100 A

General CharacteristicsAll dimensions without tolerances are for reference only. In the interest of improved design, performance and cost effectiveness, the right to make changes in these specifications with-out notice is reserved. Product markings may not be exactly as the ordering codes. Errors and omissions excepted.

Lock-out feature bracket diameter

padlock Ø 3 – 4.3 mm

Dimensions (l x w x h): 143 mm x 108.5 mm x 84.5 mm

Mass 610 g

Temperature range Operation: -30 °C ...+60 °C Storage: -40 °C ...+60 °C

Protection class Operating area IP 30 Terminal area IP 20

Vibration 3 g (to IEC 60068-2-6)

Shock 10 g (to IEC 60068-2-27)

Corrosion IEC 60068-2-11 96 hours in 5% salt mist

UL 1699B 504 hrs at 30 °C humidity 70 %

Humidity IEC 60068-2-78 96 hrs (40 °C, RH 95 %) UL 1699B 168 hrs (30 °C RH 93 %)

EMC compatibility EN 61000-6-2:2005 EN 61000-6-3:2007 UL 1699:2006/44.2 and 44.3 UL 1699B, 30.1 – 30.4

Order numbering code

Type No.PVSEC PV firefighter switch with arc fault detection Mounting T1 track-mountable (black enclosure, blue toggle) Version 01 2-pole, tested to UL 1699B 02 1-pole, type...-AF1, with UL 1699B approval Voltage rating DC 1000 V Current ratinga 30 A Arc fault detection AF1 1) Compatible e.g. with

Power One PVI-3.6-TL and SMA SMC7000HV-11

PVSEC-T1 01 - DC 1000V - 30A - AF1 ordering example

1) See explanatory note on “Compatibility with rectifiers”

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Function arc fault detection Note:

Slide switch with lock-out feature

Lock-out feature

l The arc fault detector approved to UL 1699B detects serial and parallel DC arc faults by means of a detection algorithm tailor-made for photovoltaic applications. The circuit disconnection by means of the Disconnect helps to extinguish serial arcs.

l Because of the random nature of arc faults with different types of arcs (serial, parallel, etc…) we tested the PVSEC-…-AF... with various rectifiers of major manufacturers in various application situations to achieve the highest possible arc fault detection rate.

l Using the E-T-A technology for arc fault detection significantly increases the safety and reliability of PV systems.

Operating controls on the arc fault detector:l Push button “Test” After pushing the button “Test” the PVSEC-…-AF... carries out

a self test. During the self test the LEDs “ON” and “ARC” light simultaneously. When the self test is completed successfully, the PVSEC-…-AF... opens the load contacts(➡ position “0”) and only the LED “ARC” remains lit. Duration self test: 0.1 to 4 seconds.

l Push button “Reset” By holding the “Reset” button for at least 0.5 seconds the PVSEC-

…-AF... is reset to normal duty after an arc detection or a positive self test. During this process the LEDs “ON” and “ARC” go out. After the subsequent start-up phase the load contacts are switched on again and the display “ON” lights green. Duration of the run-up phase approx. 4 seconds

Indicator LEDs on the arc fault detector: l LED “ON” lights green: The PVSEC-…-AF... is running on normal duty. Load contacts are

closed (➡ Switching position “I”).

l LED “ARC” lights red: Either an arc has been detected or a successful self test has been

carried out. The load contacts of the PVSEC-…-AF... are opened (➡ Switching position “O”).

l LEDs “ON” and “ARC” light simultaneously: The device carries out an internal self test. Applying DC 24 V supply

voltage or pressing the “reset” button triggers the self test.

Working principle l The PVSEC-…-AF... is generally switched on by means of the

integral remote control.l The PVSEC-...-AF... is always switched off by tripping the low

voltage release module.l The PVSEC-...-AF... is automatically switched on after the start-up

phase by applying the DC 24 V supply voltage to the terminals “+” and “-” except when:

- the slide switch is in position “0” - an arc fault was detectedl In case of an interruption of the supply voltage the PVSEC-…-AF...

will automatically be switched off. l Detection of an arc: In the switching position “0”, switching off happens immediately

and the LED “ARC” lights red. ➡ Before reset the root cause of the failure should be identified and remedied in the system.

l After detection of an arc, resetting the PVSEC-…-AF... requires the following:

- push the reset button for at least 0.5 sec. A self-test and the start-up phase follow

- briefly interrupt the supply voltage (on site or remotely).

Safety functionl After 10 operations within one minute type PVSEC-…-AF... will be

blocked for 2 minutes. If another 10 operations follow immediately afterwards, type

PVSEC-...-A1 will be blocked entirely.

l Humidity in the installation area (e.g. caused by condensation) must be avoided.

l When installed in enclosures with a high protection class, vent holes or pressurisation elements have to be used to avoide condensation.

l In the application it has to be ensured that each PVSEC-…-AF... is supplied with min. 1 A

l Maintenance: An electro-technical functional test to ensure system availability

should be carried out regularly, e.g. annually.

l Manual operation of the PVSEC-…-AF... on sitel Actuating the slide switch into the direction of the arrow trips the

switch electrically by way of the undervoltage release module.l When the slide switch is in position "0“, the PVSEC-…-AF...

is both mechanically and electrically locked. Remote actuation is then no longer possible.

l The switch can be protected against inadvertent operation in the OFF condition by means of a padlock with a shackle diam-eter of 3 - 4.3 mm.


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143±15-pole terminal

snap-on socket for rail EN50022-35x7,5

operating area (re-inforced insulation)

installation area (standard insulation)

8545

108,

5

84,5

84,5

143±185

108,

5

5-pole terminal

snap-on socket for rail EN50022-35x7,5

operating area (re-inforced insulation)

Type PVSEC-T102-...-AF... (1-pole)

Type PVSEC-T101-...-AF... (2-pole)

installation area (standard insulation)

Dimensions

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Schematic diagrams

Wiring diagrams

1 3

2 4 12 14

DC 24 V

U<M

AF

11+ -

U<M

21

3 4

1 3

2 4

U<M

+ -

21

43

1 2

3 4

141112

DC 24 V

U<M

U<M

AF

1

2 12

M U<

AF

14

DC 24 V

11+ -

U<M21

1

2

U<M

+ -

21

1 2

141112

DC 24 V

U<M

U<M

AF

Type PVSEC-T101-…-AF... (2-pole) Type PVSEC-T102-…-AF... (1-pole)

Type PVSEC-T101-…-AF... (2-pole) Type PVSEC-T102-…-AF... (1-pole)

Ungrounded system: Ungrounded system:

Grounded system Grounded system:

U<M

21

3 4

1 3

2 4

U<M

+ -

21

43

1 2

3 4

141112

DC 24 V

U<M

U<M

AF

U<M21

1

2

U<M

+ -

21

1 2

141112

DC 24 V

U<M

U<M

AF

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System design with PVSEC-...-AF... Application example PVSEC-…-AF...

Not-AUS

Emergency Stop

photovoltaic modules

+-

+ -

~

~

firefighter switchPVSEC-...-AF...

24 V DC

inverter

AC grid

switch-mode power supply

emergency stop

~ ~

+

+

-

-

+

+

+ -

1 3 1 3

2 4 + - 12 11 14 12 11 142 4 + -

-

-

PVSEC-...-AF...

M M U<

AF

U<

AF

24 V DC

L1L2L3NPE

switch-mode power supply

inverter

PVSEC-...-AF...

MPPT1 MPPT2

remote-signallingcontact (24 V DC)

remotesignalling contact (24 V DC)

emergency stop

firefighter switch with arc fault detection pvsec--af · pdf filel ease of project planning...

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