Section 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.
Make sure that the ventilation holes are not blocked at any side of the
installed protection relay case.
4.2
Detaching and installing the plug-in unit
4.2.1
Detaching the plug-in unit
Before detaching the plug-in unit from the case, the auxiliary voltage must
be disconnected.
1MAC457436-IB B
Section 4
Mounting
620 series ANSI
11
Installation Manual
