Motor Compartment Monitoring (P 13 Motor Only); Monitoring The Motor Winding - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

en-US
6.5.5.1 Motor compartment monitoring
(P 13 motor only)
6.5.5.2

Monitoring the motor winding

6.5.5.3 Sealing chamber monitoring (ex-
ternal electrode)
30
Installation and electrical connection
All monitoring devices fitted must be connected at all times!
Connect the electrodes via an evaluation relay. Relay "NIV 101/A" is recommended for this.
The threshold is 30 kOhm.
Wiring diagram
Electrode connection
DK
The system must be deactivated when the threshold is reached.
With bimetallic strip
Directly connect bimetallic strips 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
Bimetallic strip connection
20, 21
Temperature controller and limiter
High temperature connection
21
Center terminal
20
Low temperature connection
22
With PTC sensor
Connect the PTC sensor via an evaluation relay. Relay "CM-MSS" is recommended for this.
The threshold is preset.
PTC sensor wiring diagram
Temperature limiter
PTC sensor connection
10, 11
Temperature controller and limiter
High temperature connection
11
Center terminal
10
Low temperature connection
12
Triggering status for temperature controller and limiter
Depending on the version of the thermal motor monitoring, the following triggering status
must occur when the threshold value is reached:
▪ Temperature limiter (1 temperature circuit):
The system must be deactivated when the threshold is reached.
▪ Temperature controller and limiter (2 temperature circuits):
When the threshold for the low temperature is reached, the motor can deactivate with au-
tomatic reactivation. When the threshold for the high temperature limit is reached, the mo-
tor must deactivate with manual reactivation.
Note the additional information in the section on potentially explosive areas in the ap-
pendix!
Connect the external electrode via an evaluation relay. Relay "NIV 101/A" is recommended
for this. The threshold is 30 kOhm.
Once the threshold is reached, a warning must be output or the unit must be switched
off.
WILO SE 2019-02