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Operating instructions
| EN | 1HC0075079 AB
5.4
Mounting
CAUTION!
Incorrect system voltage.
Damage to the switching gear and the surge arrester.
X
Do not use surge arresters intended for a.c. systems in d.c. systems.
X
Observe the „Application guidelines“ from ABB Switzerland Ltd.
X
Before mounting, ensure that the characteristic data on the rating plate of the surge arrester
matches the requirements of the power system.
X
Ensure that system voltage applied at the terminals of the arrester does not exceed the
maximum permissible continuous operating voltage of the surge arrester.
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:
bolts
foundation bolts
nuts
bolt locks
any required balancing washers
5.4.1
Minimum distances between surge arresters and earth
X
Observe national regulations and the rules of the system owner regarding minimum permissible
distances between the surge arresters and the earth.
5.4.2
Connections
The POLIM®4.5 ID surge arrester is to be mounted earthed.
X
Mount the metallic side bars of the surge arresters directly to the earthed frame.
X
Connect both side bars of the surge arrester with earth.
X
Connect the high voltage connection with the head terminal U of the surge ar-rester. Use stranded
cable.
X
Observe recommended torques (Clause 3.3.3)
X
Carefully clean contact surfaces before mounting and lubricate with acid-free contact grease.
X
Ensure selection of suitable material pairs.
