ABB RELION 615 Series Installation Manual page 20

Mounting
3.
4.
20
Lift the handle to 90 degrees to release the latching mechanism.
The plug-in unit is pushed about 7 mm out of the case and the connectors are
separated.
Pull the unit out of the case.
Figure 2: Detaching a plug-in unit from the case
The protection relay features an automatic short-circuit mechanism in
the CT connector. Therefore, detaching the plug-in unit will not open the
secondary circuit of the CT which could cause dangerously high voltages.
Do not touch terminals inside the case after removing the plug-in unit.
Live terminals can be inside the case.
The signal connectors are left open when the plug-in unit is detached.
1MRS756375 T
615 series
Installation Manual