ABB RE 610 Series Installation Manual page 16

RE_ 610
Fig. 4.1.-1 Detaching a plug-in unit from the case
16
Protection Relay
Installation Manual
Before fitting a relay plug-in unit into a relay case, check that the
unit and the case have the same order number.
The order number of the case is printed on the bottom plate inside the case.
However, if a substitute plug-in unit has to be used instead of the original
unit, ensure that at least the first 10 characters in the order numbers of the
case and the plug-in unit are identical, as in the following example (the same
principle applies to all RE_ 610 relays):
Order number of the relay case
Order number of the plug-in unit
However, it is highly recommended that all characters in the order number,
except for those indicating a spare part, should match the ones of the case.
The relay features a built-in mechanical coding system which allows that a
plug-in unit with voltage or current measuring inputs only can be plugged
into a corresponding case. This helps to prevent dangerous situations from
arising in case a non-suitable plug-in unit is fitted into a relay case.
Forcing a non-suitable plug-in unit into a case breaks the relay
and may cause dangerous situations.
When installing a plug-in unit into a case:
1. Check that the handle is down in its initial position.
2. Push the unit into the case until the locks click; see Fig. 4.1.-2.
1MRS752265-MUM
REM610B55HCMP XX
REM610B55HCNR XX
A040166