4 Mounting
4.1 Checking environmental conditions and mounting
space
The mechanical and electrical environmental conditions at the installation site must
be within the limits described in the technical manual.
• Avoid installation in dusty, damp places.
Avoid places susceptible to rapid temperature variations, powerful vibrations
and shocks, surge voltages of high amplitude and fast rise time, strong induced
magnetic fields or similar extreme conditions.
• Check that sufficient space is available.
Sufficient space is needed at the front and rear of the protection relay to
allow access to wires and optical fibers to provide sufficient ventilation to the
protection relay and to enable maintenance and future modifications.
• Ensure that flush-mounted protection relays can be added and replaced without
excessive dismantling.
4.2 Detaching and installing plug-in unit
4.2.1 Detaching plug-in unit
Before detaching the plug-in unit from the case, the auxiliary voltage
must be disconnected.
1. Turn off the power.
2. Open the seal on the front panel by removing the sealing wire and screw the
sealing screw all the way in.
Mounting
1MRS757641 G
18 620 series
Installation Manual
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