SFA Sanipump VX 65 Serie Manual De Funcionamiento página 91

Selection When selecting a frequency inverter, check the following details:
Setting Observe the following instructions for setting a frequency inverter:
Start-up Observe the following instructions for starting the frequency inverter:
Operation Observe the following limits during operation on a frequency inverter:
Electromagnetic
compatibility
Interference immunity The submersible motor pump generally meets interference immunity requirements.
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5 Installation at Site
5.4.1.2 Setting the overload protection device
1. Protect the pump set against overloading by a thermal time-lag overload
protection device in accordance with IEC 60947 and local regulations.
2. Set the overload protection device to the rated current specified on the name
plate.
5.4.1.3 Level control
CAUTION
Fluid level below the specified minimum
Damage to the pump set by cavitation!
▷ Never allow the fluid level to drop below the specified minimum.
Automatic operation of the pump set in a tank requires the use of level control
equipment.
Observe the minimum level of fluid handled.
5.4.1.4 Operation on a frequency inverter
The pump set is driven by an induction machine to IEC 60034-12 designed for fixed
speed operation. In accordance with IEC 60034-25, section 18, the pump set is
suitable for operation on a frequency inverter.
▪ Data provided by the manufacturer
▪ Electrical data of the pump set, particularly the rated current
▪ Only voltage source inverters (VSI) with pulse width modulation (PWM) and
carrier frequencies between 1 and 16 kHz are suitable.
▪ Set the current limit to max. 1.2 times the rated current. The rated current is
indicated on the name plate.
▪ Ensure short start ramps (maximum 5 seconds).
▪ Only start variable speed control after 2 minutes at the earliest.
Pump start-up with long start ramps and low frequency may cause clogging.
▪ Only utilise up to 95 % of the rated power P
▪ Frequency range 30 to 60 Hz
Operation on a frequency inverter produces interference emissions whose level varies
depending on the inverter used (type, interference suppression, make). To prevent
the drive system, consisting of a submersible motor and a frequency inverter, from
exceeding any given limits always observe the EMC information provided by the
inverter manufacturer. If the inverter manufacturer recommends a shielded power
cable, make sure to use a submersible motor pump with shielded power cables.
For monitoring the sensors installed the operator must ensure sufficient interference
immunity by appropriately selecting and laying the connection cables in the plant.
No modifications are required on the power/control cable of the submersible motor
pump. Suitable analysing devices must be selected.
Sanipump VX 65/80
indicated on the name plate.
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