Installing Plug-In Unit - ABB RELION 615 Series Installation Manual

1MRS756375 T
4.2.2

Installing plug-in unit

The protection relay is constructed in a way that a plug-in unit with voltage- or
current-measuring inputs can only be plugged into a corresponding case. This
prevents fitting an unsuitable plug-in unit into a wrong case.
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Figure 3: Serial number in the case
615 series
Installation Manual
Before fitting the plug-in unit into the case, check that the unit and the
case have the same serial number.
Rating label with serial number
Forcing an unsuitable plug-in unit into the case can break both the plug-
in unit and the case and may cause danger.
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Mounting
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