Connecting To Protective Ground; Connecting The Power Supply Module - ABB Relion 670 Series Installation Manual

1MRK 514 026-UUS F
4
5
6
6.1.2

Connecting to protective ground

Connect the protective grounding screw (pos 1 in figure 26) on the rear of the IED to the closest
possible grounding point in the cubicle. Electrical codes and standards require that protective
ground cables are green/yellow conductors with a cross section area of at least 2.5 mm
The cubicle must be properly connected to the station grounding system. Use a conductor with a
core cross section area of at least 4 mm
1
IEC05000509 V2 EN-US
Figure 26: Rear view of IED showing the grounding point
Pos
1
6.1.3

Connecting the power supply module

The wiring from the cubicle terminal block to the IED terminals (see Figure
diagram) must be made in accordance with the established guidelines for this type of equipment.
670 series
Installation manual
Position of optional test switch for secondary injection into the high impedance differential IED.
Necessary connection for stabilizing resistor.
How to connect the high impedance restricted earth fault protection scheme to one CT input in IED.
2
(AWG 12).
IEC05000509=2=en=Original.vsd
Description
Protective conductor terminal. For connection of the external protective
(ground) conductor.
Use the protective conductor terminal (1) for connection to the stations
grounding system.
Section 6
Connecting
M11997-4 v11
2
(AWG14).
SEMOD128790-5 v7
20 for PSM connection
47