KSB Magnochem-Bloc, Installation & Operating Manual

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5 Installation at Site
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Magnochem-Bloc
Soft starting Soft starting a motor means that only the voltage level is changed and not the
frequency as it is the case with frequency inverter starting.
Soft starter settings:
▪ Starting voltage: 40 %
▪
Run-up time 10 seconds for voltage-controlled run-up
Table 9: Selection table for suitable starting methods
Information specified in data sheet
✘ = Suitable, ○ = Not suitable
Permissible starting method
DOL starting Star-delta
starting
Starting via frequency
inverter
Soft starting
Magnetic coupling selected for DOL
starting ✘ ○ ✘ ✘
Magnetic coupling selected for star-delta
starting ✘ ✘ ✘ ✘
Magnetic coupling selected for
frequency inverter starting ○ ○ ✘ ○
Magnetic coupling selected for soft
starting
○ ○ ✘ ✘
1. Check the available mains voltage against the data on the motor name plate.
CAUTION
Incorrect starting method without taking the selected magnetic coupling into
account
Damage to the pump (set)!
▷
Observe the information provided in the data sheet.
2. Select a suitable starting method (see selection table for suitable starting
methods).
DANGER
Excessive motor surface temperature
Explosion hazard!
Damage to the motor!
▷ Check the suitability of the frequency inverter/soft starter fitted to the motor.
▷ Adjust the motor design data at the frequency inverter/soft starter.
3. Adjust the motor design data at the frequency inverter/soft starter if required.
NOTE
A motor protection device is recommended.
5.6.1 Earthing
DANGER
Electrostatic charging
Explosion hazard!
Damage to the pump set!
▷ Connect the PE conductor to the earthing terminal provided.
▷ Provide for potential equalisation between the pump set and foundation.