47
a
y
A040165
Fig. 4.4.1.-1 Checking the order number of the relay
α = 25º
y = 40 mm
4.4.2. 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.
Feeder Protection Relay
Operator's Manual - ANSI Version
REF 610REF 610
1MRS755539
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