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Operating instructions for POLIM
5.4.3.
Connections
The base or the wall for the surge arrester must be flat, clean and suitable for the
loads that arise.
The following materials made of stainless or galvanised steel are to be provided by
the customer:
5.5.
Earthing
12
©
R surge arrester
bolts
nuts
bolt locks
Mount the ground plate of the surge arresters directly to the frame. Connect
ground plate of the surge arrester with earth.
Connect the high voltage connection with the head end terminal of the surge
arrester. Use a stranded cable.
Observe recommended torques (Clause 3.3.3).
When tightening the bolt, the torque shall be countered by a spanner at the
top end terminal.
Carefully clean contact surfaces before mounting and lubricate with acid-free
contact grease.
Ensure selection of suitable material pairs.
Observe national regulations and the requirements of the system owner.
Connect surge arresters to the system ground via the shortest path.
Observe recommended minimum diameters:
Copper
dia. 20 mm
Aluminum
dia. 40 mm
2
2
EN
ABB
Doc. 1HC0075743 AA
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