ABB POLIM-R Gebruiksaanwijzing - Pagina 11

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Surge arresters only protect medium-voltage and low-voltage apparatuses when

they are located within the protective distance The protective distance is only a few

meters.



5.4.

Mounting

Incorrect system voltage

Damage to the switching gear and the surge arrester.

 Do not use surge arresters intended for a.c. systems in d.c. systems.

CAUTION

 Do not use surge arresters intended for d.c. systems in a.c. systems.



5.4.1.

Installation position

The POLIM

5.4.2.

Minimum distances between surge arresters and earth



Doc. 1HC0075743 AA

Always mount surge arresters as close as possible to the apparatus to be pro-

tected within the protective distance. The length of the connecting cables are

decisive here.

In cases of doubt, calculate the protective distance according to the formulas

in the "Application guidelines – Overvoltage protection".

Observe the "Application guidelines - Overvoltage protection" from ABB

Switzerland Ltd

Before mounting, ensure that the characteristic data on the rating plate of the

surge arrester matches the requirements of the power system.

Ensure that system voltage applied at the terminals of the arrester does not

exceed the maximum permissible continuous operating voltage of the surge

arrester.

-R surge arresters can be mounted in all positions.

Observe national regulations and the rules of the system owner regarding min-

imum permissible distances between the surge arresters and the earth.

Operating instructions for POLIM

R surge arrester