Connection Of The Monitoring Devices - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

PE U1 V1 W1 U2 V2 W2
M 3~
Fig. 14: Connection diagram: Three-phase cur-
rent motor P17, star-delta activation, PTC sen-
sor
6.5.5 Connection of the monitoring de-
vices
Installation and operating instructions Wilo-Rexa PRO
Installation and electrical connection
11 10 12
Wire
1
3
5
4
6
2
7, 8, 9
Green/yellow (gn-ye) PE
Refer to the enclosed connection diagram for details regarding the connection and installa-
tion of the monitoring devices. Electrical connection must always be carried out by a
qualified electrician!
NOTICE! The individual wires are designated according to the connection diagram. Do
not cut the wires! There is no additional assignment between the wiring diagram and
connection diagram.
DANGER
Risk of explosion due to incorrect connection!
If the monitoring devices are not connected correctly, there is a risk of fatal injury due to
explosion in potentially explosive areas! Connection must always be carried out by a
qualified electrician. If used in potentially explosive areas:
• Connect the thermal motor monitoring via an evaluation relay!
• Deactivation by the temperature limiter must be conducted with an reactivation
lock! It must only be possible to restart the unit when the unlock key has been actu-
ated by hand!
• Connect the external electrode (e.g. sealing chamber control) via an evaluation relay
with an intrinsically safe circuit!
• Note the additional information in the chapter on potentially explosive areas found
in the appendix of these installation and operating instructions!
Overview of monitoring devices:
Internal monitoring devices
Motor compartment
Motor winding: Temperature limiter
(1-circuit temperature monitoring)
Motor winding: Temperature controller
(2-circuit temperature monitoring)
External monitoring devices
Sealing chamber
Key: - = not available/possible, o = optional, • = as standard
Designation Terminal
U1 Mains connection (start of winding)
V1
W1
U2 Mains connection (end of winding)
V2
W2
10, 11, 12 Monitoring the motor winding
Ground
P 13
•
•
o
o
en-US
P 17
o
o
•
o
29