KSB Amarex KRT Installation & Operating Manual page 29

5 Installation at Site
modifications are required on the power/control cable of the pump set. 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 230 V AC 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.
5.4.1.4.1 Motor temperature
Pump sets with 8-core connection cable (motors 32.E, 24.E, 34.E)
DANGER
Insufficient cooling
Explosion hazard!
Winding damage!
▷ Never operate an explosion-proof pump set without operational temperature
monitoring.
The pump set features double monitoring of the winding temperature. The
temperature switches for motor temperature 1 (terminals 20 and 21, max. 250 V~/2
A) serve as temperature control devices which open when the winding temperature
is too high. Tripping must result in the pump set cutting out. Automatic re-starting is
permissible.
If the temperature switches at terminals 21 and 22 are not used, the conductor
forterminal 22 must be insulated or connected to a dummy terminal.
Amarex KRT
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