Door mounting the standard size relay 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

Make a cutout for the LHMI and drill holes for the mounting bracket according to the dimensional drawing.

Figure 1. Drilling holes

A: 188 ±1 mm (7.4016 ±0.03937 in)
B: Ø 6.0 mm (0.2362 in)
C: 151 ±1 mm (5.9449 ±0.03937 in)
D: 230 ±0.4 mm (9.0551 ±0.01575 in)
E: 322 ±0.4 mm (12.6772 ±0.01575 in)

Mount the LHMI and the mounting bracket to the door panel.

Mount the LHMI with its own installation brackets to the LHMI cutout.
Mount the mounting bracket to the door panel with the M5 screws.
Tighten the M5 screws to 4 Nm ±5% (2.9502 ft-lb ±5%).
Mount the M5 screws in the upper holes of the mounting bracket, but do not tighten them. Leave them 3...4 mm (0.1181...0.1575 in) open.

Figure 2. Mounting the local HMI and mounting brackets

Attach the mounting bracket to the protection relay with the M6 screws.

Figure 3. Attaching the mounting bracket to the protection relay

Tighten the M6 screws to 9 Nm ±5% (6.6381 ft-lb ±5%).

Lift the protection relay to its place on the existing screws on the bracket.

Mount the M5 screws in the bottom holes.

Tighten the four M5 screws to 4 Nm ±5% (2.9502 ft-lb ±5%).

Figure 4. Mounting and tightening the M5 screws