5.7 Connect to mains power supply
DANGER
Danger to life from electric shock
Touching exposed and voltage-bearing elements causes an electric shock. Improper connection of
the mains supply leads to the risk of touchable live housing parts. There is a risk to life.
► Before the installation, check that the connection leads are voltage-free.
► Make sure that electrical installations are only carried out by qualified electricians.
► Provide adequate grounding for the device.
► After connection work, carry out an earthed conductor check.
WARNING
Risk of fatal injury due to electric shock on account of incorrect installation
The device's power supply uses life-threatening voltages. Unsafe or improper installation can lead to
life-threatening situations from electric shocks obtained from working with or on the unit.
► Ensure safe integration into an emergency off safety circuit.
► Do not carry out your own conversions or modifications on the unit.
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.
5.7.1 Connect three phase motor with 6-pin terminal board
There are 2 circuit arrangements:
● Delta connection for low voltage
● Star circuit for high voltage
Installation
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