1MRS 755539
Feeder Protection Relay
Operator’s Manual - ANSI Version
REF 610
37
However, it is highly recomended that all characters in the order number of the
substitute plug-in unit, exept for those for indicating a spare part, should match the
ones of the case. Otherwise, it may result in loss of significant functionality in the
application.
The relay features a built-in mechanical coding system which allows that a plugin
unit with voltage or current measuring inputs only can be plugged into a
corresponding case. This helps to prevent dangerous situations from arising, should
a non-suitable plug-in unit be fitted into a relay case.
When installing a plug-in unit into a case, first check that the handle is down in its
initial position and then push the unit into the case until the locks click; see the figure
below:
Fig. 3.4.2.-2
Installing the plug-in unit into the case
3.4.3.
Inserting and changing the battery
The battery may only be inserted and changed by trained service personnel.
To insert or change the battery, first detach the plug-in unit; refer to section
Detaching and installing the plug-in unit.
The battery compartment is accessible from underneath the plug-in unit as shown in
Fig. 3.4.3.-1
. Gently remove the battery with, for example, a flat-ended screwdriver.
Be careful not to drop the battery inside the plug-in unit. Insert a new battery under
the battery holder and ensure that you install the battery with the correct polarity to
avoid damage to the equipment.
The removed battery should be disposed of in compliance with local environmental
regulations on the disposal of lithium batteries.
The battery is not being charged during normal operation.
When the relay is taken out of service, the battery should be removed to avoid
discharge. Typical battery discharge time is 14 days.
Danger!
Forcing a non-suitable plug-in unit into a case will break the relay
and may cause dangerous situations.
!
Inst
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