Wilo FKT 50.1 - Page 27

Installation and electrical connection en
Installation and operating instructions Wilo Motor FKT 50.1, 57, 63.1, 63.2 + EMU FA 27
FKT 50.1 FKT 57 FKT 63.1 FKT 63.2
Motor bearings
o o o o
Sealing chamber
− − − •
Leakage chamber
• • • •
Vibration sensor
o o o o
External monitoring devices
Sealing chamber
− − − o
Key: − = not available/possible, o = optional, • = as standard
All the monitoring devices fitted must always be connected!
6.5.4.1 Terminal room, motor compart-
ment and sealing chamber monit-
oring
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
The system must be deactivated when the threshold is reached!
6.5.4.2 Monitoring of motor winding
With bimetallic strips
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
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. Relay “CM-MSS” is recommended for
this. The threshold has been preset.
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
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:
ƒ Temperature limiter (1temperature circuit):
The system must be deactivated when the threshold is reached.
ƒ Temperature controller and limiter (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 section on potentially explosive areas in the
appendix!