ABB RELION REX640, Installation Manual

Page: 68 / 108

5.2.1 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 4: Wire specifications for screw-compression type connectors
Connector
type Wire size Stripping
length Contact
screw
tightening
torque Connector
fixing screw
tightening
torque
Stranded Crimp ferrule
CT/VT
connectors
0.14...6
mm²
(AWG
26-10)
0.25...4 mm²
(AWG 24-12)
1
9 mm
(0.3543 in) 0.6. 0.8 Nm
(0.4425...0.
5900 ft-lb)
1.2 Nm
(0.8851 ft-lb)
Signal
connector
0.2...4 mm²
(AWG
24-12)
0.2. 2.5 mm²
(AWG 24-14)
2
7 mm
(0.2756 in) 0.4. 0.5 Nm
(0.2950...0.
3688 ft-lb)
0.2 Nm
(0.1475 ft-lb)
Serial
EIA-485
/IRIG-B
connector
0.2. 1.0
mm²
(AWG
24-17)
0.13...0.34
mm² (AWG
26-22)
7...8 mm
(0.2756...0.
3150 in)
- 0.2 Nm
(0.1475 ft-lb)
5.2.2 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.
1
In case of insulated crimp ferrules, TWIN ferrules need to be used with daisy chain requirement 2
× 2.5 mm² (AWG 14), two conductors without crimp ferrule with the same cross section 0.14...1.5
mm² (AWG 26-16)
2
For two wires 2 × 0.2...1.5 mm² (AWG 24-16)
Connecting 1MRS759115 E
68 REX640
Installation Manual