Wiring diagram

All the device wiring terminals have identical wiring capabilities. The following are the list of characteristics of the cables that can be used to connect the terminals:

Stripped length: 7 mm (0.28 in)
Cable cross sectional area: 0.2 to 2.5 mm² (24 to 14 AWG)
Tightening torque: 0.8 N.m (7.1 lb-in)
Type of screwdriver: Flat, 3 mm (0.12 in)

Cross-section area and voltage rating of wires must be suitable to the load current and to the voltage to which it is connected. The following characteristics need to be considered:

Auxiliary power supply consumption: 25 VA / 10 Ω
Current flowing to the monitoring network wiring terminal: less than 20 mA
Current flowing to the injection inhibition wiring terminal: 5 mA
Current flowing to the insulation alarm and to the preventive insulation alarm wiring terminals depends on the power rating of the insulation alarm indicator.

The illustration shows the connection of the device to a single-phase or three-phase 3- or 4-wire power system, or a DC power system.

Wiring diagram of IM400N and IM400THRN

NOTE: Circuit breakers (reference MGN61334 or equivalent) can be used to replace listed fuses.

Wiring diagram of IM400THRN for medium voltage

Voltage transformers and P1N ground adaptor are used to connect IM400THRN to systems with voltages rated up to 33 kVac. Voltage transformers should be selected appropriately depending on system voltage. Refer to the Schneider Electric medium voltage transformer catalogue.

NOTE: Ensure that maximum voltage between pins 2 and 3 of P1N ground adaptor is less than 250 Vac, 400 Vdc.

The Load Resistance ‘1R’ of the Voltage Transformer is calculated based on its characteristics. Refer to the calculation notes on www.se.com/IM400THRN for more information.