▪
Sensor circuit 10 to 30V ~
▪
Tripping current 0.5 to 3 mA
(equivalent to a tripping resistance of 3 to 60 k
Ω)
5.4.1.4.3 Leakage at the mechanical seal (only for pump sets with reinforced
bearings)
The chamber for mechanical seal leakage is equipped with a float switch (conductor
marking 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
As an option, the pump set can be supplied with temperature monitoring in the area
of the lower bearing.
Check sheet whether the pump set is equipped with bearing temperature
monitoring.
The bearing temperature sensor is a PT100 resistance thermometer. It has to be
connected to a temperature control device with a PT100 input and 2 separate
outputs for two different switching points (sensor circuit maximum 6V/2mA).
Set the following limits:
▪
Alarm at 110 °C
▪
Cut-out of the pump set at 130°C
5.4.2 Electrical connection
DANGER
Work on the pump set by unqualified personnel
Danger of death from electric shock!
▷
Always have the electrical connections installed by a trained electrician.
▷
Observe regulations IEC 30364 (DIN VDE 0100) and, for explosion-proof pump
sets, IEC 60079 (DIN VDE 0165).
WARNING
Incorrect connection to the mains
Damage to the mains network, short circuit!
▷
Observe the technical specifications of the local energy supply companies.
CAUTION
Improper wiring
Damage to the power cables!
▷
Never move the power cables at temperatures below -25 °C.
▷
Never bend or crush the power cables.
▷
Never use the power cables to lift up the pump set.
CAUTION
Motor overload
Damage to the motor!
▷
Protect the motor against overloading by a thermal time-lag overload
protection device in accordance with IEC 947 and local regulations.
Fig. 16: Float switch
5 Installation at Site
30 of 74
Amarex KRT
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 32 of 96