Connecting Wires To Screw-Compression Type Connectors; Connecting Wires To Ring-Lug Type Connectors - ABB RELION REX640 Installation Manual

Section 5
Connecting
5.2.1
5.2.2
58
See the technical manual for product-specific terminal diagrams.

Connecting wires to screw-compression type connectors

Terminal blocks of screw-compression type are used for electrical connections.
1. Open the screw terminal before inserting a wire into it for the first time. To open
the screw terminal, turn the fixing screw anti-clockwise until the terminal hole
is wide open (the inside of the terminal hole is surrounded by metal).
2. Insert the wire and turn the fixing screw clockwise until the wire is firmly fixed.
Table 3: Wire specifications for screw-compression type connectors
Connector type Wire size
Stranded
(mm²)
CT/VT 0.14...6
connectors
Signal 0.2...4
connector
Serial EIA-485 0.2...1.0
/IRIG-B
connector
1) In case of insulated crimp ferrules, TWIN ferrules need to be used with daisy chain requirement (2x2.5
mm²), two conductors without crimp ferrule with the same cross section 0.14...1.5 mm²
2) For two wires 2x(0.2...1.5) mm2

Connecting wires to ring-lug type connectors

Terminal blocks of ring-lug type are used for electrical connections.
1. Connect a suitable ring lug to the cable.
2. Remove the contact screws from the connector, thread the ring-lug cable lug to
the terminal screw and tighten the screw.
Stripping length
Crimp ferrule (mm)
(mm²)
9
1)
0.25...4
7
2)
0.2...2.5
0.13...0.34 7...8
1MRS759115 A
Contact screw Anchoring
tightening screw tightening
torque (Nm) torque (Nm)
0.6...0.8 1.2
0.4...0.5 0.2
- 0.2
REX640
Installation Manual