Connecting wires to ring-lug type connectors - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - Installation Manual - REX640 Protection and control - Relion Protection and Control - PCL4 - IEC - ANSI - 16.02.2023

REX640 Installation Manual

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.
Table 1. Wire specifications for ring-lug type connectors

Connector type

Wire size

Ring-lug type

Contact screw tightening torque

Connector fixing screw tightening torque

Stranded

Crimp ferrule

CT/VT

connectors

2.62…6.64

mm² (AWG 12-10)

-

TE ring lug TE-35787 1

1.2. 1.5 Nm

(0.8851…1.1063 ft-lb)

1.2 Nm (0.8851 ft-lb)

Signal connectors

1.25…2 mm² (AWG 16-14)

-

TE ring lug TE-320561 1

1.13 Nm (0.8334 ft-lb)

0.35 Nm (0.2581 ft-lb)

1 Use the TE crimping tool TE-58433-3