KSB Amacan P 500-270 Installation & Operating Manual page 38

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5 Installation at Site
4
3
2
1
Fig. 25: Sensor positions
Position Sensor
1 Bearing temperature (lower bearings)
2 Motor temperature (PT100)
3 Motor temperature (PTC)
4 Bearing temperature (upper bearing)
5 Leakage inside the motor
6 Mechanical seal leakage
5.4.1.4.1 Motor temperature
DANGER
Insufficient cooling
Explosion hazard!
Winding damage!
▷ Never operate a pump set without operational temperature monitoring
equipment.
▷ For explosion-proof pump sets use a thermistor motor protection relay with
manual reset and ATEX certification for monitoring the temperature of
explosion-proof motors in "flameproof enclosure" type of protection.
The motor is monitored by three series-connected PTC thermistors with terminals 10
and 11. Tripping must result in the pump set cutting out. Automatic re-starting is not
permitted.
On explosion-proof pump sets, they must be connected to a thermistor motor
protection relay with manual reset and ATEX approval for monitoring the
temperature of explosion-proof motors in "flameproof enclosure" type of
protection.
Pt100 resistance thermometer
As an option, in addition to the above, the motor can be fitted with Pt100 resistance
thermometers in the winding. These can be used to display the motor temperature
(sensor circuit maximum 300mV/3 mA).
Amacan P
5
6
Standard Optional
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