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5| Electrical connection
5
Electrical connection
DANGER!
INFO!
5.1 Information for contactor and motor contactor selection
All protection equipment, switching and monitoring devices must comply with the local safety regula-
tions and established specifications (e.g. VDE) and regulations as well as the manufacturer's specifica-
tions. Motor protection switch is required! Motor contactors, feed lines, fuses and motor protection
switches must be rated according to the maximum operating current (see name plate).
Use the following overload protection device:
A current-dependent time-delayed overload protection device for monitoring of all three phases, not
set higher than the rated current of the machine, which must respond at 1.2 times the set current
within 2 hours and must not have responded at 1.05 times the set current within 2 hours, or another
comparable device.
5.2 Connection of the driving motor
The compressor is designed with a motor for star-delta circuits.
Designation on the name plate
∆ / Y
Star-delta start-up is only possible on 230 V voltage supply. Example:
Direct start
L3
L1 L2
INFO!
H igh voltage! Risk of electric shock! Only carry out work when the
electrical system is disconnected from the power supply!
C onnect the compressor motor in accordance with the circuit diagram
(see inside of terminal box).
U se suitable cable entry point of the correct protection type
(see name plate) for routing cables into the terminal box.
I nsert the strain reliefs and prevent chafe marks on the cables.
Compare the voltage and frequency values with the data for the mains
power supply. Only connect the motor if these values are the same.
230 V ∆
Star-delta start
L1 L2
L1 L2
The connection examples shown refer to the standard
version. In the case of special voltages, the instructions affixed to the
terminal box apply.
Sticker on the terminal box
Direct start only
L3
L3
400 V Y
L3
L1 L2
L3
L1 L2
96027-11.06-DGbF
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D
GB
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