Zehnder Pumpen ZFS 71.1 W Ex Betriebsanleitung Seite 24

If an additional switching device is connected to the pump ZFS 71.1 W Ex, it has to be connected as follows:
:
motor
1 U1 +Z2 2 (U2) 3 (Z1)
( )
Capacitor 60µF
motor protection
c o n t a c t o r
m a i n s 2 3 0 V
Three phase model
The wires of the seven-wire connection cable of the pumps (three-phase model) are marked as follows:
green/yellow
1
2
3
4
5
6
- The switching device has to be installed outside the explosion-prone area!
- The floater for the protection against dry running has to be installed in such a way, so that a decline
of the water level below the bottom line of the motor housing is not possible.
M
230V
5 (T2) 4 (T1) 6(T3)
control loop
c l i p p i n g c i r c u i t
(PE) - Earth wire (earthing)
}
(U1)
(V1)
(W1)
(T1) - Second contact control loop
(T2) - Shared contact control loop and clipping circuit
(T3) - Second contact clipping circuit
green/yellow (PE)
earth wire
Three windings, star connection
24
(designations of the motor cable)