Sulzer VMS - Electrical Installation

Installation, Operating and Maintenance Instructions (Original Instructions) 23
VMS Vertical Multistage Pumps
23
7.3 Electrical installation
In accordance with the local regulations only authorised personnel are allowed to make
electrical connections to the motor.
ATTENTION! Connect the motor according to Figure 14, ”Motor connections”, and always check
the rotation direction.
Electrical connections:
• Make sure that the motor specications correspond with the power supply to which the pump motor is
connected. Consult electrical diagrams for the correct connection diagram.
• Connect the motor using a motor safety switch.
1571-00
Figure 14. Motorconnections-(examplemaydi󰀨eruponchosenmotor)
PTC connection STM 140 EK:
• Standard motors 3 kW and up are equipped with a PTC thermistor. Consult Table 14, “Technical
specications” PTC STM 140 EK.
• Connect the PTC to a thermistor relay.
Table 14. TechnicalspecicationsPTCSTM140EK
Value
t
n
[°C] 140
R
20
°C[Ώ] ~ 20
R
tn
-20°C[Ώ] ~ 250
R
tn
-5°C[Ώ] < 550
R
tn
+5°C[Ώ] > 1330
R
tn
+15°C[Ώ] > 4000
U
n
[VDC] 2.5 < U < 30