Rack mounting of two narrow size protection relays with local HMI - 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. Mount two local HMIs to the rack plate.
    1. Mount LHMIs with their own installation brackets to the LHMI cutouts.
    2. Install the RJ-45 couplers with a cable to the panel cutouts and connect the cables to the LHMI service port X1.2.
    Figure 1. Mounting two local HMIs
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    1
    7U rack plate
    2
    LHMI installation brackets
    3
    RJ-45 couplers with cables
  2. Mount the mounting bracket to the relays.
    1. Mount the mounting bracket to protection relays with M6 screws.
    2. Tighten the M6 screws to 9 Nm ±5% (6.6381 ft-lb ±5%).
    Figure 2. Mounting the mounting bracket
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    1
    Mounting bracket
    2
    M6 screws
  3. Attach the rack plate to the mounting bracket with M5 screws.
    Figure 3. Mounting M5 screws
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