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1MAC457436-IB B
4.2.2
620 series ANSI
Installation Manual
The signal connectors are left open when the plug-in unit is detached.
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.
Before fitting the plug-in unit into the case, check that the unit and the case
have the same serial number.
Section 4
Mounting
13
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