Door mounting protection relay - 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 - 16.10.2024

REX640 Installation Manual
  1. Drill holes according to the dimensional drawing.
    Figure 1. Drilling holes
    image/svg+xmlACB
    A
    Standard size relay: 249.0 ±0.4 mm (9.8032 ±0.01575 in)
    Narrow size relay: 157.4 ±0.4 mm (6.1969 ±0.01575 in)
    B
    Ø 7.0 mm (0.2756 in)
    C
    245.0 ±0.4 mm (9.6457 ±0.01575 in)
  2. Mount the protection relay to the door or panel with the M6 screws.
    Figure 2. Mounting the protection relay to the door
    image/svg+xml1
    1
    M6 screws
  3. Tighten the four M6 screws to 9 Nm ±5% (6.6381 ft-lb ±5%).
    Figure 3. Tightening the M6 screws
    image/svg+xml