▪
Electrical data of the pump set, particularly the rated current
▪
Ensure short start ramps (maximum 5 seconds).
▪
Only start speed-controlled operation after 2 minutes at the earliest.
Pump start-up with long start ramps and low frequency may cause clogging.
Observe the following limits when operating the pump set via frequency inverter:
▪
Only utilize up to 95 % of the motor rating P
2
indicated on the name plate.
▪
Frequency range 30-60 Hz
Frequency inverter operation produces RFI 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 the limits
stipulated in EN 50081 always observe the EMC information provided by the inverter
manufacturer. If the inverter manufacturer recommends a shielded power cable,
make sure to use a pump set with a shielded power cable.
The pump set generally meets the interference immunity requirements to EN 50082.
For monitoring the sensors installed the operator must ensure sufficient interference
immunity by appropriately selecting and laying the cables in the plant. No
modifications are required on the power/control cable of the pump set. Suitable
analyzing devices must be selected. To monitor the leakage sensor inside the motor,
it is recommended to use a special relay available from KSB.
5.4.1.3
Sensors
CAUTION
Operating an incompletely connected pump set
Damage to the pump set!
▷
Never start up a pump set with incompletely connected power cables or non-
operational monitoring devices.
CAUTION
Incorrect connection
Damage to the sensors!
▷
Observe the limits stated in the following sections of this manual when
connecting the sensors.
The pump set features sensors that avoid hazards and damage to the pump set.
Measuring transducers are required for analyzing the sensor signals supplied.
Suitable devices for 230 V~ can be supplied by KSB.
NOTE
Reliable and safe operation of the pump within the scope of our warranty is only
possible if the sensor signals are properly analyzed as stipulated in this manual.
All sensors are located inside the pump set and are connected to the power cable.
For information on wiring and core identification please refer to the wiring
diagrams.
The individual sensors and the limit values to be set are described in the following
sections.
5.4.1.3.1 Motor temperature
CAUTION
Insufficient cooling
Winding damage!
▷
Never operate a pump set without operational temperature monitoring.
Start-up
Operation
Electromagnetic
compatibility
Interference immunity
5 Installation at Site
Amacan P
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