Connecting; Required Tools; Connecting Wires; Connecting Ring-Lug Type Wires - ABB Relion 620 series Installation Manual

1MAC303209-MB C
Section 5
5.1
5.2
5.2.1
5.3
620 series
Installation Manual

Connecting

Required tools

Only use a screwdriver and insert bits for Phillips (PH 1) cross-recessed head screws when
handling CT/VT terminals (X2.1) of screw-compression type.

Connecting wires

All connections are made on the rear of the case. No soldering is needed.
See the application manual for product-specific connection diagrams.
• Connect each signal connector (X100 and X110) terminal with one 14 or 16 Gauge
wire. Use 12 or 14 Gauge wire for CB trip circuit.
• Connect each ring-lug terminal for signal connector X120 with one of maximum 14
or 16 Gauge wire.
• Connect each ring-lug terminal for CTs/VTs with one 12 Gauge wire.

Connecting ring-lug type wires

Ring-lug type insulated terminal should be used for signal connector X120. Use a number
2 Philips screw driver for Ring lug terminals.

Connecting protective grounding

The ground lead must be a minimum a 10 gauge wire. If the length of the
earth lead is too long, the cross section of the wire must be increased.
Use fine copper wire as the ground lead.
To connect a separate ground protection lead:
1. Loosen the protective ground screw to connect a separate ground protection lead.
Section 5
Connecting
19