over-current protection relay / three-phase / differential
SEL-487B

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over-current protection relay / three-phase / differential over-current protection relay / three-phase / differential - SEL-487B
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Characteristics

  • Measured/monitored value:

    over-current

  • Other characteristics:

    three-phase, differential

Description

Bus Differential and Breaker Failure Relay
The SEL-487B provides optimized, low-impedance bus differential fault detection by using high-speed, subcycle protection coupled with high-security operation for external faults. Superior protection performance is combined with integrated station automation features for seamless transition into new and retrofit applications.