1MRS 752264-MUM
Motor Protection Relay
Operator’s Manual
REM 610
35
3.4.
Detachable plug-in unit
3.4.1.
Identifying the product
The order number is found on a label under the lower handle of the relay.
Fig. 3.4.1.-1
Checking the order number of the relay
3.4.2.
Detaching and installing the plug-in unit
Prior to detaching the plug-in unit from the case, the auxiliary voltage must be
disconnected. To detach the plug-in unit, 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 will separate the connectors and you can easily 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 will be left open when the plug-in unit is detached.
Fig. 3.4.2.-1
Detaching the plug-in unit from the case
Warning!
When checking the order number of the relay plug-in unit, be
careful not to lift the handle beyond 25
°
(approx. 40 mm). Lifting
the handle any further will detach the plug-in unit from the case.
α
= 25
°
y = 40 mm
!
a
OrderNo_a
y
Det
aching_a
