Successor of the STS 7041 (page 27) relay, NPSC 800 - 1checks synchronism between two sources. It is as well used to authorise a closing order to the paralleling Circuit breaker.The NPSC 800 - 2 allows operation of live/dead line and us. It may also realise the reconnection of two sections

supplied by the same source.

ANSI FUNCTION FOR NPSC 800-1 :25

ADDITIONAL FUNCTIONS FOR NPSC 800-2 :
DLDB / DLLB / LLDB / RECONNECTION