Detaching And Installing The Plug-In Unit - ABB REM 610 Operator's Manual

1MRS755538
4.4.2.
Motor Protection Relay
Operator's Manual - ANSI version
a
y
Fig. 4.4.1.-1 Checking the order number of the relay
α = 25º
y = 40 mm

Detaching and installing the plug-in unit

Before detaching the plug-in unit from the case, the auxiliary voltage
must be disconnected.
To detach the plug-in unit:
1. Lift the lower handle until the spring-loaded locks on both sides of the handle are
released and the unit is pushed about 6 mm out of the case. This separates the
connectors.
2. Pull the unit out of the case.
The relay features an automatic short-circuit mechanism in the current transformer
(CT) connector. Therefore, detaching the plug-in unit will not open the secondary
circuit of the CT which otherwise could cause dangerously high voltages.
Signal connectors are left open when the plug-in unit is detached.
REM 610 REM 610
A040165
47