ABB Relion 620 Series, Руководство по установке

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1MAC303209-MB C
Section 5
Connecting
620 series 19
Installation Manual
Section 5 Connecting
5.1 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.
5.2 Connecting wires
All connections are made on the rear of the case. No soldering is needed.
• 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.
5.2.1 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.
5.3 Connecting protective grounding
To connect a separate ground protection lead:
1. Loosen the protective ground screw to connect a separate ground protection lead.
See the application manual for product-specific connection diagrams.
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.