consisting of submersible motor and frequency inverter with the limits stipulated by
EN 50081, it is imperative to observe the EMC information provided by the inverter
manufacturer. If the manufacturer recommends shielded power cables, a pump set
with shielded power cable must be used.
The pump set generally meets the requirements on interference immunity stipulated
by EN 50082. For monitoring the sensors installed, the operator must ensure
sufficient interference immunity by selecting and routing the cables in the plant
accordingly. No modifications are required on the power/control cable of the pump
set itself. Suitable analysing devices must be selected. In this case we recommend to
monitor the leakage sensor fitted inside the motor by means of a special relay
available from KSB.
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 cables or non-
operational monitoring devices.
CAUTION
Incorrect connection to power supply
Damage to the sensors!
▷
Observe the limits stated in the following sections of this manual when
connecting the sensors.
The pump set is equipped with sensors designed to prevent hazards and damage to
the pump set.
Measuring transducers are required for analysing the sensor signals supplied. Suitable
devices for 230V~ 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 these operating instructions.
All sensors are located inside the pump set and are connected to the power cable.
For information on wiring and core marking please refer to the wiring diagrams. (
Section 9.2 Page 70)
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 explosion-proof pump sets use a thermistor tripping unit with manual reset
which is ATEX-approved for monitoring the temperature of explosion-proof
motors in "flameproof enclosure" Ex d type of protection.
The pump set is equipped with double monitoring of the winding temperature. Two
bimetal switches (terminals 21 and 22, max. 250V~/2A) 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-start is permissible.
For explosion-proof pump sets, the three additional, series-connected (PTC)
Interference immunity
5 Installation at Site
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Amarex KRT
Summary of Contents for Amarex KRT
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