40
2920 7090 00
Instruction book
3.3 Electrical
Connections
Warning
The electrical connection must be carried out by an electrician and corresponds to the local
codes. The indications on the motor data plate must correspond to the power supply voltage
and frequency. The installation must include an isolating switch in the power line near to the
unit and be protected against short-circuits by fuses for each phase refer section Overload
relays and fuses or Cable sizes.
The power supply and earthing lines must be of suitable size. refer section Overload relays
and fuses or Cable sizes.
For DOL starters, connect the power supply cables as shown in the electrical diagrams. For
Y/D starters, connect the power supply cables to terminal board (X1) as shown in the picture.
Check the setting of the overload relay. refer section Overload relays and fuses or Cable
sizes.
Electric Cabinet
Example of an electrical cubicle
Reference
Description
F1
Fuse
F4 Overload
relay
K1
Line contactor with integrated Y-D timer
K2 Star
contactor
K3 Delta
contactor
Summary of Contents for LF 10
Page 1: ...Atlas Copco Industrial aluminium piston compressor LF 2 LF 3 LF 5 LF 7 LF 10 Instruction book ...
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Page 12: ...10 2920 7090 00 Instruction book Power Pack with unloading valve Base mounted ...
Page 18: ...16 2920 7090 00 Instruction book Air flow and regulating system with DOL starter ...
Page 19: ...2920 7090 00 17 Instruction book Air flow and regulating system with Y D starter ...
Page 20: ...18 2920 7090 00 Instruction book Air flow and regulating system of trolley ...
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