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Goodnal STP ST041 Biological Treatment (KSB Amamix Direct Installation and Operation Manual) Vendor Manual
18 of 52
Q-Pulse Id VM385
5 Installation at Site
interference immunity by appropriately selecting and laying the cable in the plant.
No modifications are required on the power cable of the submersible mixer. Suitable
analysing devices must be selected. To monitor the leakage sensor inside the motor,
it is recommended to use a special relay available from KSB.
5.4.1.4 Sensors
DANGER
Operating an incompletely connected submersible mixer
Explosion hazard!
▷ Never start up a submersible mixer with incompletely connected power cables
or non-operational monitoring devices.
The submersible mixer is equipped with sensors designed to prevent hazards and
damage to the mixer.
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 submersible mixer within the scope of our warranty is
only possible if the sensor signals are properly analysed as stipulated in the manual.
All sensors are located inside the submersible mixer and are connected to the power
cable.
For information on wiring and core identification please refer to the wiring
diagrams. (⇨ Section 9.3 Page 46)
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!
▷ Never operate an explosion-proof submersible mixer without operational
temperature monitoring equipment.
▷ For explosion-proof submersible mixers, use 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.
CAUTION
Insufficient cooling
Damage to the submersible mixer!
▷ Never operate a submersible mixer without operational temperature
monitoring equipment.
The motor is monitored by three series-connected PTC thermistors with terminals 10
and 11. They must be connected to a thermistor tripping unit with manual reset.
Tripping must result in the submersible mixer cutting out.
For explosion-proof submersible mixers use a thermistor tripping unit which is ATEX-
approved for monitoring the temperature of explosion-proof motors in "flameproof
enclosure" Ex d type of protection.
Amamix® direkt
Active 29/10/2013
Page 18 of 52
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