Section 5 Connecting; Required Tools; Connecting Wires; Connecting Protective Grounding - ABB 620 series ANSI Installation Manual

1MAC457436-IB B
Section 5
5.1
5.2
5.3
620 series ANSI
Installation Manual
Connecting

Required tools

Only use a screwdriver and insert bits for Phillips (PH 2) cross-recessed head screws when
handling CT/VT terminals of screw-compression type.

Connecting wires

All connections are made on the rear of the case. No soldering is needed.
• Connect each signal connector 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.
See the application manual for product-specific connection diagrams.

Connecting protective grounding

The ground lead must be at least a 10 Gauge wire. If the length of the
ground lead is 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:
Section 5
Connecting
37