5.6.1 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.
Table 9: Time relay settings for star-delta starting:
Motor rating Y time to be set
[kW] [s]
≤ 30 < 3
> 30 < 5
5.6.2 Earthing
DANGER
Electrostatic charging
Explosion hazard!
Fire hazard!
Damage to the pump set!
▷ Connect the PE conductor to the earthing terminal provided.
5.6.3 Connecting the motor
NOTE
In compliance with IEC 60034-8, 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. Match the motor's direction of rotation to that of the pump.
2. Observe the manufacturer's product literature supplied with the motor.
5.7 Checking the direction of rotation
DANGER
Temperature increases 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.
WARNING
Hands inside the pump casing
Risk of injuries, damage to the pump!
▷ Always disconnect the pump set from the power supply and secure it against
unintentional start-up before inserting your hands or other objects into the
pump.
5 Installation at Site
Normblock
27 of 58
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