6 Mounting
Maschinenfabrik Reinhausen GmbH 202088 6385142/08 ENETOS
®
ED
Circuit Function Type Material
Cross wiring between motor-
drive units
Power supply Unshielded, separate cable Copper
Tap-change supervisory con-
trol
Shielded Copper
Pulse circuit, raise/lower Shielded Copper
Tripping circuit Q1-Off Shielded Copper
Table15: Recommendation for connection cables
6.5.2 Electrical connection
The voltage supply for the motor-drive unit must be able to provide 5…7
times the nominal operating current of the motor-drive unit for one second.
A maximum voltage tolerance of -20…+10% of the nominal voltage must be
observed to avoid damage to the drive.
1. Switch off the voltage supply.
2. Secure the voltage supply to prevent an unintentional restart.
3. Ensure that everything is de-energized.
4. Visibly ground and short-circuit the motor-drive unit.
5. Cover or cordon off adjacent energized parts.
6. Connect the motor-drive unit in accordance with the connection diagrams
provided in the briefcase. Observe the supply voltages (motor circuit, con-
trol circuit, heater circuit) and pin assignments stated in the connection di-
agram.
7. When operating the motor-drive unit, ensure that a current corresponding
to that stated in the Technical Data chapter (Load capacity of micro-
switches) flows through the micro-switches in the motor-drive unit at all
times to ensure correct functioning of the micro-switches.
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