Electrical Connections - Atlas Copco G 18 Instruction Book

Instruction book
Text on drawings
Dryer outlet cooling air
4.3

Electrical connections

General instructions
Step
1
2
3
4
Specific voltage change instructions for G 15L – G 22 with 200 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 200 V or 460 V, the main cubicle should be
rewired as described below:
2920 7119 21
Always disconnect the power supply before working on the electrical circuit!
Action
Install an isolating (disconnector) switch near the compressor.
Check the fuses and the setting of overload relay. See
fuses.
If fitted, check transformers for correct connection.
See Electric cable size
Connect the power supply cables to terminals L1, L2 and L3 (terminal block 1X0) and
the neutral conductor (if applicable) to terminal (N). Connect the earth conductor to
terminal PE/GND.
Translation or explanation
Dryer outlet cooling air
for selection of power supply line cable.
Settings for overload relay and
47