13
Pump NB/FB/WP/SM/F
Version: 27216 - E
Schmalenberger GmbH + Co. KG
D-72072 Tübingen / Germany
2.3.4
Electrical Connection
The electrical connection for the pump should only be made by a company specialising in
electrical systems that is approved by the power provider, taking into consideration the
technical connection requirements.
Connection tasks must only be performed by a certified installation electrician.
Applicable DIN VDE regulations must be observed.
Compare the existing mains power supply with the information on the factory plate of the
motor and select a suitable circuit.
We recommend using a motor protection device.
In compliance with VDE 0530-8, three-phase motors are always wired for clockwise
rotation (looking at the motor shaft stub).
The direction of rotation of the pump is anti-clockwise as standard (viewed from the suction
flange).
Always note the arrow on the pump indicating the direction of rotation.
Connect the motor according to the circuit diagram in fig. 2 or fig. 3.
Motor with PTC thermistors as thermal winding protection
Connect the PTC thermistor (PTC sensor) to the downstream trigger unit if required. The
PTC thermistors are designed according to DIN 44081 and DIN 44082.
Risk of explosion!
Motors with explosion protection must always be connected using a motor
protection switch.
Circuit
(low voltage)
Fig. 2:
Connection diagram for three-
phase motors, circuit
Circuit Y (high voltage)
Fig. 3:
Connection diagram for three-
phase motors, circuit Y
W2
U2
V2
U1
V1
W1
L2
L1
L3
W2
U2
U1
V1
W1
L2
L1
L3
V2
