4.3 Electrical connections
Always disconnect the power supply before working on the electrical circuit!
General instructions
Step Action
1 Install an isolating switch near the compressor.
2 Check the fuses and the setting of overload relay. See Settings for overload relay and
fuses.
3 If fitted, check transformers for correct connection.
4 Connect the power supply cables to terminals L1, L2 and L3 (1X0) and the neutral
conductor (if applicable) to terminal (N). Connect the earth conductor.
The power supply cable delivered with the compressor must be protected by raceway or
by a suitable conduit system.
Specific voltage change instructions for units with 208 V / 230 V / 460 V cubicle
The standard voltage configuration for the compressor is mentioned on the data plate of the
machine.
When the compressors leave the factory, the units are connected for 230 V / 3 phase.
To modify the wiring for an operating voltage of 208 V or 460 V, the main cubicle should be
rewired as described below:
Instruction book
48 2920 7113 40
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