over-current protection relay / three-phase / programmable / configurable
Schweitzer Engineering Laboratories
three-phase, programmable, configurable, differential, for generators
The SEL-387 Current Differential and Overcurrent Relay provides protection, control, and metering for transformers, machines, buses, breakers, and feeders. Features include four three-phase current inputs with independent restrained and unrestrained differential protection, programmable single- or dual slope differential characteristic, circuit breaker monitor, battery voltage monitor, and enhanced SELogic® Control Equations.