User Documentation

7 Earthingandshielding | Electromagnetic compatibility (EMC)

55Manual u-control2604080000/03/08.2020

Cabinet design according to EMC guideline:

24567

1 Earthing strips

Earthing strips must be used for connecting inactive metal

parts if it is not possible to connect two large pieces of met-

al. Use short earthing strips with large surfaces.

2 Clamping bracket for signal cables

If shielded signal cables are used, the shield must be at-

tached to the clamping bracket (KLBÜ series) on the busbar

over a large surface. The braided shield must cover and make

good contact with a large part of the clamping bracket.

3 Mounting plate

The support beam for holding control components must be

connected to a large part of the cabinet housing.

4 Busbar

The busbar must be connected via the rail holding xture.

The cable shields are xed to the busbar.

5 Protective earth conductor rail

The protective earth conductor rail must likewise be attached

to a large part of the mounting plate, and it must be connect-

ed to the protective earth conductor system via an external

cable with a cross-section of at least 10 mm

, in order to dis-

charge interference current.

6 Protective earth terminal strip

The protective earth terminal strip must be connected to the

protective earth conductor rail in a neutral-point congura-

tion.

7 Cable to protective conductor system (earthing

point)

The cable must be connected to a large part of the protective

conductor system.