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. (
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!
▷
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. Tripping must result in the submersible mixer cutting out. Automatic re-start
is not permitted. On explosion-proof submersible mixers, 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
B2
a)
b)
Fig. 5: a) Wiring of the electrode relay and b) Position of the electrode in the motor
housing
An electrode (B2) fitted inside the motor monitors the winding and connection space
for leakage. This electrode must be connected to an electrode relay (core marked 9).
Tripping of the electrode relay must result in the submersible mixer cutting out.
5 Installation at Site
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Amaprop®
Goodnal STP ST041 Biological Treatment (KSB Amaprop Installation and Operating Manual) Vendor Manual
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Active 29/10/2013
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