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5.4.4
Connections
The base 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:
ƒ bolts
ƒ nuts
ƒ bolt locks
X
The design of the surge arrester POLIM®-C is symmetrical. The high voltage cable shall be either
connected to the head end terminal while the food end terminal is earthed or vise versa.
X
Mount the surge arresters directly to the base. Connect the terminal of the surge arrester with
earth.
X
Connect the high voltage connection with the other terminal of the surge arrester. Use a stranded
cable.
X
Observe recommended torques (Clause 3.3.3).
X
When tightening the bolt, the torque shall be countered by a spanner at the top end terminal.
X
Carefully clean contact surfaces before mounting and lubricate with acid-free contact grease.
X
Ensure selection of suitable material pairs.
5.5
Earthing
X
Observe national regulations and the requirements of the system owner.
X
Connect surge arresters to the system ground via the shortest path.
X
Observe recommended minimum diameters:
ƒ POLIM®-C .. N/ND
ƒ copper
ƒ aluminum
ƒ POLIM®-C .. HD
ƒ copper
ƒ aluminum
1HC0076149 AC | EN | Operating instructions
35 mm
2
50 mm
2
2
65 mm
95 mm
2
|
9
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