Zehnder Pumpen ZPG 71 Betriebsanleitung Seite 20

Wiring diagram three phase AC motor:
motor
1 (U1) 2 (V1) 3 (W1)
motor protection
c o n t a c t o r
m a i n s 4 0 0 V
Connection of the thermal winding cover
Control loop: T1 and T2 must be connected in a switching device in such a way, that the following function is
guaranteed: When the temperature sensors respond, the pump is switched off until the temperature
has dropped again. Now the pump is switched on again.
Clipping circuit: T2 and T3 must be connected in a switching device in such a way, that the following function is
guaranteed: When the temperature sensors respond, (failure of the control loop), the pump is
switched off and can be restarted by hand solely. The pump may only be restarted after an error
analysis has been conducted and the cause of malfunction has been eliminated.
M
3
5 (T2) 4 (T1) 6(T3)
control loop
c l i p p i n g c i r c u i t
(designations of the motor cable)
green/yellow (PE)
earth wire
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