Wilo FKT 50.1 Series Installation And Operating Instructions Manual page 188

en
6.5.4.1 Terminal room, motor compart-
ment and sealing chamber monit-
oring
6.5.4.2 Monitoring of motor winding
6.5.4.3 Leakage chamber monitoring
188
Installation and electrical connection
Sealing chamber
Leakage chamber
Vibration sensor
External monitoring devices
Sealing chamber
Key: − = not available/possible, o = optional, • = as standard
All the monitoring devices fitted must always be connected!
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 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
High temperature connection
21
Centre 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 has been preset.
PTC sensor wiring diagram
Temperature limiter
10, 11 PTC sensor connection
Temperature controller and limiter
High temperature connection
11
Centre 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
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!
The float switch is equipped with a potential-free normally closed contact. The switch-
ing capacity can be found in the supplied connection diagram.
FKT 50.1 FKT 57 FKT 63.1
− − −
• • •
o o o
− − −
FKT 63.2
•
•
o
o
WILO SE 2019-01