Wall mounting the narrow size 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 four M5 screw holes according to the dimensional drawing.
    Figure 1. Drilling screw holes
    image/svg+xmlAB1
    A
    230.4 ±0.4 mm (9.0709 ±0.01575 in)
    B
    237 ±0.4 mm (9.3307 ±0.01575 in)
    1
    M5 hole
  2. Mount the M5 screws in the upper holes, but do not tighten them. Leave them 3...4 mm (0.1181...0.1575 in) open.
    Figure 2. Mounting M5 screws in the upper holes
    image/svg+xml1
    1
    M5 screws
  3. Attach the mounting bracket to the protection relay with M6 screws and tighten the screws to 9 Nm ±5% (6.6381 ft-lb ±5%).
    Figure 3. Mounting M6 screws
    image/svg+xml21
    1
    Mounting bracket
    2
    M6 screws
  4. Lift the protection relay to its place on the existing screws on the wall mounting section.
  5. Mount the M5 screws in the bottom holes.
  6. Tighten all the M5 screws.
    Figure 4. Mounting and tightening the M5 screws
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