Rack mounting the standard 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. Attach the protection relay to a 7U rack plate with M6 screws.
  2. Tighten the M6 screws to 9 Nm ±5% (6.6381 ft-lb ±5%).
    Figure 1. Mounting the protection relay to the rack plate
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    1
    7U rack plate
    2
    M6 screws
  3. Mount the protection relay and rack plate to a 19" rack.

    The rack plate can also be mounted to the rack before the protection relay is attached to it.

  4. Tighten the screws.
Figure 2. Rack mounted protection relay
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