ABB MWK Manuel d'utilisation - Page 9

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ABB MWK Manuel d'utilisation
5.4

Mounting

5.4.1

System voltage

WARNING!
Surge arrester connected to the system during insulation tests
The test voltage applied to the equipment during insulation tests may damage the surge
arrester.
Disconnect surge arrester from the system during insulation tests.
X
CAUTION!
Incorrect system voltage or technical data
Damage to the system and the surge arrester. The test voltage applied to the equipment
during insulation tests may damage the surge arrester.
Do not use surge arresters intended for AC systems in DC systems.
X
Consult the manufacturer for the application of surge arresters intended for DC systems
X
in AC systems.
Observe the "Application guidelines" as mentioned in chapter 3.3.2 above.
X
Before mounting, ensure that the characteristic data on the surge arrester matches the
X
requirements of the power system.
Ensure that the system voltage applied at the terminals of the arrester does not exceed
X
the continuous operating voltage U
5.4.2

Connections

The top end is generally intended for connection to the high-voltage and the foot end/floor
plate is generally to be connected to the system ground.
The base or foundation for the surge arrester must be flat, clean and suitable for the loads
that arise.
The following parts made of stainless or galvanised steel are to be provided by the
customer depending on the application:
ƒ Bolts
ƒ Foundation bolts
ƒ Nuts
ƒ Bolt locks
ƒ Any required balancing washers
The ordered mounting accessory is already mounted to the surge arrester in most cases.
If the mounting accessory has been ordered and delivered separately, it must be mounted
according to the enclosed instruction, data sheet or dimension drawing.
The use of a counter tool at the same electrode is advised when accessories are tightened
to the top or bottom connection.
Furthermore, it is recommended to use a flexible connection on one terminal of the surge
arrester to minimise mechanical stress on the active part.
Careful consideration of the potential consequences associated with the installation of a
surge arrester as a supporting post is necessary.
Surge arrester without disconnecting device
Ensure selection of suitable material pairs.
X
Connect the earth conductor to the ground terminal of the surge arrester.
X
Connect the high-voltage conductor to the high-voltage terminal of the surge arrester.
X
Observe the recommended torques and the screw-in depths (see chapter 3.3.3).
X
When tightening a bolt, the torque must be countered by a spanner at the same terminal
X
to minimise torque or bending forces on the surge arrester.
Carefully clean the contact surfaces before mounting and lubricate with acid-free contact
X
grease.
1HC0141361 AA | EN | Operating instructions
of the surge arrester.
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