RMC-121D Current Relay

The RMC-121D combined short circuit and over-current relay is applied for protection of generators against both over-currents and short circuit currents (I> + I>>).

RMC-121D has two sets of contacts.

RMC-111D

· Short circuit

· I>>: 100 to 400 %. <50 mS response time

RMC-121D

· Short circuit

· I>>: 100 to 400 %. 2 sets of contacts (parallel)

RMC-122D

· Short circuit and over-current

· I>>: 100 to 400 %, I>: 50 to 150 %

· Combined functionality

RMC-131D

· Differential current

· I>>: 100 to 400 %. 2 sets of contacts (parallel).