Table of Contents
Advertisement
ABB
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
EN
©
R surge arrester
11
Advertisement
Table of Contents
