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5 Installation at Site
Setting Observe the following instructions for setting a frequency inverter:
▪ Set the current limit to max. 1.2 times the rated current. The rated current is
Start-up Observe the following instructions for starting the frequency inverter:
▪ Ensure short start ramps (maximum 5 seconds).
▪ Only start variable speed control after 2 minutes at the earliest.
Operation Observe the following limits during operation on a frequency inverter:
▪ Only utilise up to 95 % of the rated power P
▪ Frequency range 25 to 50 Hz
Electromagnetic
Operation on a frequency inverter produces interference emissions whose level varies
compatibility
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.
Interference immunity The submersible motor pump generally meets interference immunity requirements.
For monitoring the sensors installed the operator must ensure sufficient interference
immunity by appropriately selecting and laying the power cables in the plant. No
modifications are required on the power/control cable of the submersible motor
pump. Suitable analysing devices must be selected. To monitor the leakage sensor
inside the motor using a special relay available from KSB is recommended.
5.4.1.4 Sensors
Operating an incompletely connected pump set
Explosion hazard!
Damage to the pump set!
Incorrect wiring
Damage to the sensors!
The pump set features sensors designed to prevent hazards and damage to the pump
set.
Measuring transducers are required for analysing the sensor signals supplied. Suitable
devices for 230 V AC can be supplied by KSB.
Reliable and safe operation of the pump within the scope of our warranty is only
possible if the sensor signals are properly analysed as stipulated in this manual.
All sensors are located inside the pump set and are connected to the sensor cable.
For information on wiring and core marking see (ð Section 9.3, Page 84)
The individual sensors and the limit values to be set are described in the following
sections.
Amacan P
indicated on the name plate.
Pump start-up with long start ramps and low frequency may cause clogging.
DANGER
▷ Never start up a pump set with incompletely connected electric cables or non-
operational monitoring devices.
CAUTION
▷ Observe the limits stated in the following sections of this manual when
connecting the sensors.
NOTE
indicated on the name plate.
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