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4.3
Electromagnetic compatibility - EMC
The a.m. standards as well as the "EMC Guide for Switchgear"
and erection of the switchgear. Installation, connection and maintenance have to be performed in
accordance with the stipulations of the operating instructions. For operation, the legal stipulations applicable
at the place of installation have to be observed additionally. In this way, the switchgear assemblies of this
type series fulfil the basic protection requirements of the EMC guide.
The switchgear operator / owner must keep the technical documents supplied with the switchgear throughout
the entire service life, and keep them up-to-date in case of modifications of the switchgear.
1)
Dr. Bernd Jäkel, Ansgar Müller; Medium-Voltage Systems - EMC Guide for Switchgear
4.4
Rating plates
Each panel has a rating plate fixed on the inside of the doors to the high-voltage and low-voltage
compartment containing the following information:
1
2
3
4
5
Fig. 1: Rating plate
(1)
Switchgear type
(2)
Serial number
(3)
Technical data
(4)
Internal arc classification
The block-type current transformers and the voltage transformers have their own type plates. A copy is
provided on the inside of the high-voltage door.
4.5
IAC classification
The data (see Fig. 1) describes the internal arc classification of the panel according to IEC 62271-200.
The entries IAC A FLR 25 kA 1 s and accessibility type A in the example shown mean:
The IAC classification is referred to each panel. The data on the rating plate (see Fig. 1) describes the areas
classified for the corresponding panel.
139-2021.9 / 07
(5)
(6)
(7)
(8)
IAC: Internal Arc Classification
F: Internal arc classification for the front side (Front)
L: Internal arc classification for the lateral sides (Lateral)
R: Internal arc classification for the rear side (Rear)
25 kA: Tested short-circuit current
1 s: Test duration
A: Type of accessibility A; for authorized personnel only
NXAIR M
1)
are applied during design, manufacture
Number of operating instructions for the panel
Year of manufacture
Panel number
Loss of service continuity category,
partition class
Technical data
6
7
8
13
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