Wilo T 17.3 P Series User Manual

Installation and electrical connection en
Installation and operating instructions Wilo Motor T 17.3, 20.2:, EMU FA, Rexa SUPRA, Rexa SOLID 75
Motor without Digital Data Interface
Refer to the enclosed connection diagram for details regarding the connection and in-
stallation 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 reactivation
lock! It must only be possible to restart the unit when the unlock key has been
actuated 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!
6.5.6.1 Monitoring of motor winding
With bimetallic strips
Connect the bimetallic strips directly to the switchgear or via an evaluation relay.
Connection values: max. 250V(AC), 2.5A, cos φ=1
Wiring diagram for bimetallic strip
Temperature limiter
20, 21
Bimetallic strip connection
Temperature controller and limiter
21
High temperature connection
20
Centre terminal
22
Low temperature connection
With PTC sensor
Connect the PTC sensor via an evaluation relay. "CM-MSS" relay is recommended for
this purpose.
PTC sensor wiring diagram
Temperature limiter
10, 11
PTC sensor connection
Temperature controller and limiter
11
High temperature connection
10
Centre terminal
12
Low temperature connection
Trigger status for temperature controller and limiter
The installed sensor specifies the trigger temperature as part of thermal motor monit-
oring using bimetallic or PTC sensors. Depending on the thermal motor monitoring ver-
sion, the following triggering status must occur when the trigger temperature is
reached:
ƒ Temperature limiter (1temperature circuit):
The unit must be deactivated once the trigger temperature has been reached.
ƒ Temperature controller and limiter (2temperature circuits):

Wilo T 17.3 P Series Specifications

General

Brand	Wilo
Model	T 17.3 P Series
Category	Engine
Language	English