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Interlock Application - Capacitor Bank Access

Scheme # 37
To prevent closing ground switch B under load and to enable access to the capacitor bank enclosure only after the capacitor bank has been grounded and discharged.

Breaker A is closed. Ground switch B is locked open. All capacitor bank enclosure doors are locked closed. Key A-1 is held in L-O interlock on breaker A. Key A-2 is held in L-C interlock on ground switch B. Key A-3 is held in L-C interlock (Type M2D) on access door #1.

To gain access to capacitor bank enclosure, proceed as follows:

Reverse sequence to restore service.

Scheme # 25
Scheme # 26
Scheme # 27 Scheme # 28
Scheme # 29
Scheme # 30
Scheme # 31
Scheme # 32
Scheme # 33 Scheme # 34
Scheme # 35
Scheme # 35A
Scheme # 36