Startup
E:\shares\Baprod\BA\subtec_m\sewage\us\startup.fm
6-3
Units with relays
Please observe the relay manual.
After starting
The rated current is briefly exceeded during the start-up procedure. Once this process has ended,
the operating current should no longer exceed the rated current.
If the motor does not start immediately after the machine is switched on, it must be switched off
immediately. The start pauses specified in the technical data must be adhered to before starting up
again. If the fault recurs, the machine must be switched off again immediately. The machine may
only be started again once the fault has been rectified.
The following items should be monitored:
- Operating voltage (permissible dev/- 5% of the rated voltage)
- Frequency (permissible dev/-2% of the rated frequency)
- Current consumption (permissible deviation between phases is a maximum of 5%)
- Voltage difference between the individual phases (max. 1%)
- Starts and stops per hour (see technical data)
- Air entry in the infeed, a deflector plate should be fitted if necessary
- Minimum water immersion level, level control unit, dry-run protection
- Smooth running
- Check for leaks, if need be, follow the necessary steps as set out in “Maintenance”
As mechanical shaft seals have a certain running-in phase, it is possible
that minor leaks may occur. This running-in phase lasts approx. 1 - 3
months. Change the oil several times during this phase. Please consult
the manufacturer if leakage continues after this running-in phase has
ended.
Operation in the limit range
The maximum limit range deviation for operational data is +/-10% of the rated voltage and +3%
to –5% of the rated frequency. Significant deviation from the operational data is to be expected
(also see DIN VDE 0530, Section 1). The permissible voltage difference between the individual
phases is a maximum of 1%. Continuous operation in the limit range is not recommended.
