Amarex KRT series, Installation And Operating Manual, Page: 41 / 124

5 Installation at Site
41 of 124
Amarex KRT
Electromagnetic
compatibility
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.
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 analyzing devices must be selected. This applies in particular to the
leakage sensor inside the motor.
5.4.1.4 Sensors
DANGER
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.
5.4.1.4.1 Motor temperature
DANGER
Insufficient cooling
Explosion hazard!
Winding damage!
▷
Never operate a pump set without operational temperature monitoring.
▷ For nonincendive pump sets use a thermistor tripping unit with manual reset.
Pump sets with cooling system (installation types D and K)
Four series-connected thermistors (PTC) with terminals 10 and 11 monitor the
winding and cooling liquid temperature. Use a thermistor tripping unit with manual
reset.