DEIF RMC-121D Current relay

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.

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.

Variants

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)

Features

Short circuit and over-current circuit relay (I> + I>>)

ANSI code 50 and 51

Measurement of 3-phase currents

LED indication of fault condition

Timer-controlled tripping

LED indication for activated relay

35 mm DIN rail or base mounting