Time division multiplex system for a segregated phase comparison

Time-optimum reception of protection commands in a remote...

Transformer circuit and method with saturation prevention

Transformer differential relay

Transmission line protection system

Two way packet radio including smart data buffer and packet rate

Unsupervised trip keying for phase comparison relaying apparatus

UPS-computer system and method for initiating computer shutdown

Utility control and autonomous disconnection of distributed...

Voltage and current source selection system for use in the...

Zone protective directional relay scheme

Zone selective interlock for a circuit breaker system

Zone selective interlock module for use with static trip circuit