Wilo 6069866, Инструкция по установке и эксплуатации

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Installation and electrical connection en
Installation and operating instructions Wilo-Rexa PRO 27
Overview of monitoring devices:
P 13
P 17
Motor compartment
• o
Motor winding: temperature limiter
(1-circuit temperature monitoring) • o
Motor winding: temperature controller
(2-circuit temperature monitoring) o •
Sealing chamber
o o
Key: - = not available/possible, o = optional, • = as standard
All the monitoring devices fitted must always be connected!
6.5.5.1 Monitoring of motor compart-
ment (P 13 motor only)
Connect the electrodes via an evaluation relay. Relay “NIV 101/A” is recommended for
this. The threshold is 30 kOhm.
Wiring diagram
DK
Electrode connection
When the threshold is reached, deactivation must take place!
6.5.5.2 Monitoring of motor winding
With bimetallic strip
Connect the bimetallic strips in the switchgear itself 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
Bimetallic strip connection
21
Temperature control
21
High temperature connection
20
Centre terminal
22
Low temperature connection
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
10
PTC sensor connection
11
Temperature control
11
High temperature connection
10
Centre terminal
12
Low temperature connection
Triggering status with temperature control and limiting
Depending on the version of the thermal motor monitoring, the following triggering
status must occur when the threshold value is reached:
▪ Temperature limiting (1 temperature circuit):
When the threshold is reached, deactivation must take place.
▪ Temperature control (2 temperature circuits):
When the threshold for the low temperature is reached, the motor can deactivate with
automatic reactivation. When the threshold for the high temperature limit is reached,
the motor must deactivate with manual reactivation.
Note the additional information in the chapter on potentially explosive areas found
in the appendix!