5 Installation at Site
40 of 126
Amacan S
1589.837/01-EN
CAUTION
Temperature monitoring devices not properly connected
Winding damage!
▷
Never use the Pt100 resistance thermometers as the only means of monitoring
the motor temperature.
5.4.1.4.2 Leakage inside the motor
DANGER
Incorrect monitoring of leakage electrode
Explosion hazard!
Danger of death from electric shock!
▷
Voltages must be < 30 V AC and tripping currents < 0.5 mA.
PE
K 1
9
K 1
9
8
Wiring of the electrode relay
(standard)
Wiring of the electrode relay (pump
sets with vibration sensor only)
Position of the electrodes in the
motor housing
Electrodes fitted inside the motor monitor the winding and connection space for
leakage. Both electrodes are connected in parallel (core identification 9). They must
be connected to an electrode relay. Tripping of the electrode relay must result in the
pump set cutting out.
The electrode relay (K1) must trip the motor at a tripping resistance between 3 and
60 kΩ.
Pump sets with vibration
sensors
A different wiring system is used for the electrodes of pump sets with vibration
sensors.
5.4.1.4.3 Mechanical seal leakage
Fig. 25:
Float switch
The chamber for mechanical seal leakage is equipped with a float switch (core
identification 3 and 4). The contact (maximum 250 V~/2 A) opens when leakage is
detected in the leakage chamber. Opening of the contact shall trigger an alarm
signal.
5.4.1.4.4 Bearing temperature
The lower bearing of the pump set is equipped with a bearing temperature sensor.
This sensor is a Pt100 resistance thermometer (core identification 15 and 16). It must
be connected to a temperature control device with a Pt100 input and two separate
outputs for two different switching points (sensor circuit maximum 6 V / 2 mA).
