Routine Test Procedure

Factory Routine Test Procedure

Switchgear Type WS

Table of Content 1. Tightness test (IEC 62271-200 / 7.4) 2. Dielectrical test on the main circuit (IEC 62271-200 / 7.1) 3. Partial discharge measurement (IEC 62271-200 / 7.101) 4. Dielectrical test on auxiliary an control circuits (IEC 60694_Edition 2.2 / 7.2.4) 5. Mechanical Operation Tests (IEC 62271-200 / 7.102) 6. Verification of correct wiring (IEC 60694_Edition 2.2 / 7.2.1) 7. Test of Auxiliary Electrical Devices (IEC 60694_Edition 2.2 / 7.2.2) 8. Operation Test of Interlocks (IEC 62271-200 / 7.104) 9. Measurement of the resistance of the main circuits (IEC 62271-200 / 7.3) 10. Operation Test of Control, Metering, Indicating and Protection Systems (IEC 60694_Edition 2.2 / 7.2.1) 11. Routine Test of Circuit Breakers (IEC 62271-100 / 7)

Routine Test Procedure

Switchgear Type WS

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Nowak - Quality Dpt. September 2009

AREVA Energietechnik GmbH - Sachsenwerk Mittelspannung Rathenaustrasse 2 - D-93055 Regensburg - Telefon: +49(0)941 46 20 0 - Fax: +49(0)941 46 20 418 - www.areva.com Vorsitzender des Aufsichtsrates Dr. rer. nat. Peter Kirchesch - Geschäftsführung: Helmut Hoos, Dr.-Ing Wolfgang Voß Sitz Frankfurt am Main - Amtsgericht Frankfurt am Main, HRB 40819 - Ust.-IdNr. DE 811982897

Factory Routine Tests The following routine tests will be carried out at AREVA Sachsenwerk for each panel type WS and need not to be repeated during the commissioning procedure at site. The tests are carried out according to concerning IEC Standards

1. Tightness test All gas compartment are filled with SF6 gas up to the maximum service pressure All sealing are checked for their gas tightness with an SF6 gas sniffer indicator, as

shown below.

Standard Value: The leakage detector has a sensibility value of 5x10-8

cm3/sec.

Maximum Gas leakage rate 1%/year

⇒ 1x10-4

up to 1x10-5

cm3/sec.

The leakage test will be passed if the leakage rate is lower than 10

-7 cm

3/sec.


Switchgear Type WS

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2. Dielectrical test on main circuits

The table 9 at IEC 60694_Edition 2.2 / 6.2.5.1 is listing the power frequency dry test procedure which is carried out with test voltage according to IEC 60694_Edition 2.2 / Table 1a, Column 2. Test No.1: disconnector closed, CB closed Test No.2: disconnector closed, CB open

During this tests the vacuum chamber of each phase suffers a voltage test while the circuit breaker is in off-position. Each voltage test is carried out at rated filling pressure. Test voltage: 50 kV injected for 1 min

Test object Capacitive Coupling Test transformer divider capacitor

The test will be repeated for the other phases as well.

kV

pC

∼ Ck

Zm Measuring impedance


Switchgear Type WS

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3. Partial discharge measurement

The test procedure of partial discharge measurement is compliant with (IEC 62271-200 / 7.101). The test is done by rated filling pressure.

One phase is tested while disconnector and circuit breaker are closed and the the two other phases are earthed. Test voltage: 1.1 x Ur = 26.4 kV 1.1/√3 x Ur = 15.2 kV Test duration: minimum 2 min The test will be passed if the measured value is lower than 20pC. Test object Capacitive Coupling Test transformer divider capacitor

The test will be repeated for the other phases as well.

Note: The applied power frequency voltage will be raised to pre-stress value at least 1.3xUr and maintained at this value for at least 10 s.

kV

pC

∼ Ck

Zm Measuring impedance


Switchgear Type WS

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4. Dielectrical test on auxiliary an control circuits

Each terminal block is tested by injection of 1 kVrms for 1 second. The used testing device indicates insulation failures or short circuit connections immediately by an alarm signal. To avoid any damages the wiring of the protection relays is disconnected during the testing.

1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4

V

test device

0 - 10 kV AC

test object


Switchgear Type WS

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5. Mechanical Operation Tests 5.1 Manual (crank handle) operation test of circuit breaker spring charging. 5.2 Circuit breaker closing and tripping operation by mechanical push buttons. 5.3 Manual (crank handle) operation test of disconnecting switch. 5.4 Manual (crank handle) operation test of earthing switch.

5.5 Manual (crank handle) operation test of bus bar earthing switch.

5.6 Contact position test of the disconnecting switch (shown by picture below).


Switchgear Type WS

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6. Verification of correct wiring 6.1 Cross checking of the installed LV-equipment and the list of equipment. (The correctness of ordering and type numbers is controlled before LV- equipment is installed.) 6.2 Check of the correctness of internal circuit breaker wiring. 6.3 Check of the correctness of each wire connection. (Wiring faults are marked up in the wiring diagrams and corrected.) 6.4 Comparison of ferruling installed with ferruling shown in the wiring diagrams. (Faults are marked up in the wiring diagrams and corrected)

Remark: The approved and corrected wiring diagrams are treated as internal test certificates and are stored in the testing archives. Wiring faults marked up in the wiring diagrams are transformed to the original wiring diagrams. All test are carried out in function if possible.


Switchgear Type WS

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7. Test of Auxiliary Electrical Devices That procedure covers the following test: 7.1 Metering of values provided by the capacitive voltage indication system are carried out according to IEC 61243-5.

7.2 Function test of IVIS/IVIS-F test Check of correct indication at determined voltage values - U < 0.1xUr zero potential no display indication - 0.1xUr < U < 0.4xUr intermediate stage display indication dotted line - U > 0.4xUr voltage life display indication full line

interlocking contact indication 7.3 Check of each blocking coil which have to provide a proper function between 15 % undervoltage and 10 % overvoltage. 7.4 Check of each circuit breaker close coil which have to provide a proper function between 20% undervoltage and 10% overvoltage. 7.5 Check of each circuit breaker trip coil which have to provide a proper function between 30 % undervoltage and 10% overvoltage. 7.6 Check of circuit breaker spring charge motor which has to provide a proper function between 20% undervoltage and 10 % overvoltage. 7.7 Check of disconnector motor which has to provide a proper function between 20% undervoltage and 10 % overvoltage. 7.8 Check of earthing switch motor which has to provide a proper function between 20% undervoltage and 10 % overvoltage. 7.9 Measurement of disconnector and earthing switch motor current.


Switchgear Type WS

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8. Operation Test of Interlocks

The proper function of the mechanical interlocking system is checked by manual operation (crank handle) of disconnecting switch, earthing switch, circuit breaker, busbar earth switch and central key interlock according the operation procedures mentioned in the operation instructions for WS panels chapter 6.2 interlocks.

Remark:

Electromechanical interlocking systems (blocking coils) relevant for the complete switchboard are tested during the HV-part commissioning on site.

9. Measurement of the resistance of the main circuits

This test is carried out by feeding in 100 ADC. The current supply will be connected with the outgoing bushing and the disconnecting switch contacts


Switchgear Type WS

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Test Description Apply 100 Amps. DC current through each feeder

and direct reading of the resistance is measured from the instrument. Injection points: contact of isolator and cable connection sockets

Test Instrument Details Make: GLOOR ORLIKON; Type: 60670 R; S.No.: 146 532 or equivalent equipment

Reference values:

2500A panel (multi cable connection): L1 56.1µ Ω; L2 56.5µ Ω; L3 52.3µ Ω

630/1250A panel (multi cable connection): L1 144.7µ Ω; L2 137.9µ Ω; L3 133.2µΩ

630/1250A panel (single cable connection): L1 134.0µ Ω; L2 128.0µ Ω; L3 122.5µΩ

2500A Bus Coupler&Riser: L1 97.6µ Ω; L2 82µ Ω; L3 95.4µΩ

2500A Bus Section&Riser BB1: L1 85.7µ Ω; L2 75.0µ Ω; L3 84.8µΩ

2500A Bus Section&Riser BB2: L1 104.0µ Ω; L2 98.1µ Ω; L3 95.9µΩ Note: The reference values to be understood as maximum allowable values.

Busbar

Switching condition Q1: open Q2: open Q0: closed Q5: open

DC current Generator Test instrument

µ Ω

Q1 Q5

Q0

Q2


Switchgear Type WS

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10. Operation Test of Control, Metering, Indicating and Protection Systems That test procedure covers the following scope of tests: 10.1 Circuit breaker tripping by installed overcurrent relays if possible. The settings provided by the relay manufacturer are not changed. Indivitually protection relay settings have to be realized during the commissioning at site. 10.2 Functional test of all mounted LV-devices. Settings provided originally provided by the supplier are not changed. 10.3 Current transformer test: 10.3.1 Primary injection test for each current transformer combinated with circuit breaker tripping. No metering of class, burden and mag. curve ratings because that was already done by the supplier and confirmed by test certificates.

10.3.2 Check of correctness of the CT ratio.

10.3.3 Cross checking of CT rating plates and the ratings listed in the wiring diagram list of equipment . 10.3.4 Energy flow direction.


Switchgear Type WS

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10.4 Voltage transformer test: 10.4.1 Primary injection test for each voltage transformer. No metering of class, burden and mag. curve ratings because that was already done by the supplier and confirmed by test certificates. 10.4.2 Check of correctness of the VT ratio. 10.4.3 Cross checking of VT rating plates and the ratings listed in the wiring diagram list of equipment .


Switchgear Type WS

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11. Routine Test of Circuit Breakers 11.1 Dielectrical test on the main Circuit acc. to IEC 62271-100 / 7.1

Dielectrical test on auxiliary and control circuit acc. to IEC 62271-100 / 7.2 IEC 60694_Edition 2.2 / 7.2.4 : The test voltage shall be 2kV with a duration of 1s

Measurement of the resistance of the main circuit acc. to IEC 62271-100 / 7.3

11.2 Design and visual checks acc. to IEC 62271-100 / 7.5 11.3 Mechanical operation tests acc. to IEC 62271-100 / 7.101

- at minimum and maximum supply voltage of operating devices: - at rated supply voltage of operating devices: 5 close-open operating cycles - for circuit-breakers inteded for auto-reclosing: 5 open-close cycles - measurement of operating times expected closing time of CB: < 70 ms expected opening time of CB: < 65 ms - measurement of speed on and speed off - measurement of spring charge motor current - test of the control and auxiliary switch to indicate the open and closes position of

the circuit breaker correctly - verification of all auxiliary equipment operating correctly in the limits of supply

voltage - inspection of the wiring of the control and auxiliary equipment circuits - recharging time of the springs for operating the circuit breaker - charging motor current - operating of anti-pumping device - function test of under-voltage opening releases within the specified voltage

limits (if applicable) - test of damper function

• check of correct travel

• check of correct damping - test of blocking coils

• check of proper function between 15 % undervoltage and 10 % overvoltage

Remark:

No-load travel curve will be recorded but not within a prescribed envelope of mechanical travel characteristic.


Switchgear Type WS

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11.6 Additional internal documentation

- type, ident. no., fabrication no. CB, fabrication no. Switchgear - serial No. of vacuum bottles - spring charging motor: time, max. current, min. operation voltages - operation counter - test date, signature - Picture of the used test equipment:

Documents

Routine Test Procedure