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1. Check the available mains voltage against the data on the motor name plate.
2. Select an appropriate start-up method.
5.8.1 Setting the time relay
Table 12: Time relay settings for star-delta starting:
5.9: Checking the direction of rotation
5.8.2 Connecting the motor
1. Change the motor,s direction of rotation to match that of the pump.
2. Observe the manufacturer,s product literature supplied with the motor.
WAR NING
Incorrect connection to the mains
Damage to the mains network, short circuit!
Observe the technical specifications of the local energy supply companies.
NOTE
It is recommended to fit a motor protection device.
C AUTION
Switchover between star and delta on three-phase motors with star-delta starting takes
too long
Damage to the pump (set)!
Keep switch-over intervals between star and delta as short as possible (see table:
Time relay settings for star-delta starting).
Y time to be set
Motor rating
≤ 30 kW
< 3 s
> 30 kW
< 5 s
NOTE
In compliance with DIN VDE 0530 - Part 8, three-phase motors are always wired for
clockwise rotation (looking at the motor shaft stub).
The pump's direction of rotation is indicated by an arrow on the pump.
DANG E R
Temperature increase resulting from contact between rotating and stationary
components
Explosion hazard!
Damage to the pump set!
Never check the direction of rotation by starting up the unfilled pump set.
Separate the pump from the motor to check the direction of rotation.
WAR NING
Hands or objects inside the pump casing
Risk of injuries, damage to the pump!
Never insert your hands or any other objects into the pump.
Check that the inside of the pump is free from any foreign objects.
5 Installation at Site
