Retrofit solution for Microshield Overcurrent relay (MSOC)

The PCMU MSOC is a dedicated feeder protection and

control relay perfectly aligned for the protection, control,

measurement, and supervision of utility substations and

industrial power systems, designed to replace the ABB

legacy Microshield overcurrent (MSOC) relay. The relay

provides exact wire-alike matching rear terminals as the

existing MSOC relay, saving time and engineering. This

wire-alike feature makes the PCMU MSOC the ideal solution

for upgrading to the industry’s latest technologies. The

PCMU MSOC is a retrofit solution based on REF615 relay

from the proven Relion® family. The 615 series relays are

characterized by their compact and withdrawable design.

Application

The PCMU MSOC solution provides main protection for over

head lines, cable feeders, and busbar systems of distribution

substations. It can be applied for protection and control of

grounded and ungrounded distribution systems.