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4 Mounting instructions
B 61-300 • For supply and control cables
40488-EN-161114
4 Mounting instructions
4.1 Installation in switching cabinet
The overvoltage arrester is mounted in the switching cabinet on
carrier rails according to EN 50 022 (DIN rail) or EN 50 035 (C-rail). It
is fastened to the carrier rail with a screw located on its exterior. The
screw is marked with the symbol for functional ground. Depending on
the version, it may be galvanically connected to the ground terminal of
the overvoltage arrester (see circuit diagram in chapter "
Wiring plan
").
The carrier rail must be connected (low impedance) to the potential
equalization line (PA). The wire cross-section must be at least 2.5
mm
2
, the cable must be as short as possible.
1
Fig. 2: Mounting on carrier rail according to EN 50 022 (DIN rail) 35 x 7.5 mm
1 Carrier rail
1
Fig. 3: Mounting on carrier rail according to EN 50 035 (C-rail) 35 x 7.5 mm
1 Carrier rail
Installation procedure
Proceed as follows:
1. Loosen fixing screw
