WARNING
Incorrect connection to the mains
Damage to the mains network, short circuit!
▷
Observe the technical specifications of the local energy supply companies.
1. Check the available mains voltage against the data on the motor name plate.
2. Select an appropriate start-up method.
NOTE
It is recommended to fit a motor protection device.
5.8.1 Setting the time relay
CAUTION
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).
Table 8: Time relay settings for star-delta starting:
Motor rating
Y time to be set
≤
30 kW
< 3 s
> 30 kW
< 5 s
5.8.2 Earthing
DANGER
Electrostatic charging
Explosion hazard!
Damage to the pump set!
▷
Connect PE conductor to the earthing terminal provided.
▷
On belt-driven pump sets use belts made of conductive material.
5.8.3 Connecting the motor
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.
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.
5 Installation at Site
28 of 66
Etanorm
