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 67)
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 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.
Opening of the switch contacts must result in the pump set cutting out. Automatic
re-start is permissible.
For explosion-proof pump sets, the three additional, series-connected (PTC)
thermistors with terminals 10 and 11 must be used. They must be connected to a
thermistor tripping unit with manual reset and ATEX approval for monitoring the
temperature of explosion-proof motors in "flameproof enclosure Ex d" type of
protection.
5.4.1.4.2 Leakage inside the motor
PE
K 1
9
B2
Connecting the electrode relay
B2
Position of the electrode in the motor housing
An electrode fitted inside the motor monitors the winding and connection space for
leakage. This electrode must be connected to an electrode relay (conductor marked
9). Tripping of the electrode relay must result in the pump set cutting out.
The electrode relay (K1) must meet the following requirements:
5 Installation at Site
Amarex KRT
29 of 74
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 31 of 96
