HV GIS TEST

1. HV test kit should have the surge arrestor facility to with stand the surges. Otherwise kit will get damage.

2. Earthing of generator is very impotent for leakage and surge current following.

3. Make the required circuit in GIS and open the TC1 & TC2 and DC circuit to avoid the tripping during HV injection.

4. Put LCC operations local mode to avoid the remote operations during testings

5. Short all CT secondaries and Spare CTs

6. Check all VT primary links make it open.

7. Check the Capacitance value of GIS some times need compensate capacitors in HV test.

8. If flash accrue concentrate on outdoor GIB side.

9. More details LINK

More details LINK

CTPU TESTING MANUAL

FIBER OPTIC CABLES

Fiber Optic cable Used for Differentials relays and DTR & SAS communications 

Duplex - ST-ST-MM62.5/125)- ORANGE CABLE

BREAKER STATUS FOR BB & AR

1. The Breaker ready status for Busbar Low impedence relay should be coming from Aux relay. This Aux relay should enable only through SF6 low stage -2 ( Trip block ). No need spring charge and close block ( SF6 low stage -1).

 2. The Breaker ready status for AR should be coming from a Aux relay. This Aux relay should enable only through SF6 low stage -1 ( Close block ) and Spring not charge contact . No need SF6 low stage -2 contacts.

ISOLATIOR STATUS REB 500

 

For REB 500 ABB relay isolstor status contact should be Early make and late breake