CAUTION
Danger of injury from moving parts
After a power failure or a standstill as a result of overheating, the motor restarts automatically. There
is a risk of injury to fingers and hands if they enter the operating range of rotating parts.
► Safely disconnect motor from the mains.
► Secure the motor against reactivation.
► Dismantle the vacuum pump for inspection, away from the system if necessary.
NOTICE
Risk of property damage from excess voltage
Incorrect or excessive mains voltage will destroy the motor.
► Always observe the motor rating plate specifications.
► Route the mains connection in accordance with locally applicable provisions.
► Always provide a suitable mains fuse to protect the motor and supply cable in the event of a fault.
NOTICE
Motor damage from overheating
Limited motor fan cooling capacity, caused by low speeds, causes the motor to overheat.
► During operation with frequency converter, observe the rotation speed range specified in the
technical data.
Establish the mains supply
1. Always ensure a secure connection to the earthed conductor (PE).
2. Make sure that electrical or electromagnetic pulses from the power supply do not impair the screw
pump motor.
3. Install an overload protection for the motor of the trip class 20 according to EN 60204-1.
4. Connect the motor to the power supply.
5.12.1 Connect three phase motor with 6-pin terminal board
There are 2 circuit arrangements:
● Delta connection for low voltage
● Star circuit for high voltage
V
L2
L3
L1
W2
W1
V2
V1
U2
U1
Fig. 19:
Delta connection
Connect the three phase motor with delta connection
► Connect the three phase motor according to the connection diagram.
Installation
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