SEL-751 DER redundant relay assembly with ABB FT-1 test switch with panel-mount status lights for PTs. Stand-alone configuration for control of 1600A LV circuit breaker. Read back 52A Aux contacts. [National Grid, MA]


SEL-751 DER redundant relay assembly with ABB FT-1 test switch with panel-mount status lights for PTs. Stand-alone configuration for control of 1600A LV circuit breaker. Read back 52A Aux contacts. [National Grid, MA]