5 Installation at Site
33 of 82
Amarex
2573.820/02-EN
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
DANGER
Operating an incompletely connected pump set
Explosion hazard!
Damage to the pump set!
▷ Never start up a pump set with incompletely connected power connection
cables or non-operational monitoring devices.
CAUTION
Incorrect wiring
Damage to the sensors!
▷ Observe the limits stated in the following sections of this manual when
connecting 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 230VAC 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 analysed as stipulated in this manual.
All sensors are located inside the pump set and are connected to the connection
cable.
For information on wiring and core identification please refer to the "Wiring
diagrams" section.
The individual sensors and the limit values to be set are described in the following
sections.
5.4.1.5 Motor temperature
DANGER
Insufficient cooling
Explosion hazard!
Winding damage!
▷ Never operate an explosion-proof pump set without operational temperature
monitoring equipment.
Standard pump sets (version US):
An electric circuit with two bimetal switches serves as a temperature monitor. The
bimetal switches (terminals 20 and 21, max. 250V~/ 2A) are connected in series and
open when the winding temperature is too high.
Tripping must result in the pump set cutting out. Automatic re-starting is permitted.
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