ABB Relion 620 Series, Installation Manual

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1MAC303209-MB C
Section 4
Mounting
620 series 13
Installation Manual
3. Turn down the handle completely to push plug-in unit into its final position in the
case.
Figure 3: Installing a plug-in unit into the case
4.2.3 Sealing the plug-in unit
The front panel of the IED has an integrated sealing screw. By default the screw is fully
screwed-in and tightened, and is not used when installing or detaching the plug-in unit.
1. Open the sealing screw about nine turns.
2. Thread a sealing wire trough the holes in the sealing screw and the handle.
The handle must be locked or sealed to secure the mechanical performance
under any conditions caused by vibration, pressure, shock or bump, seismic
activity or other equivalent circumstances.