Factory 4: Motor Winding Supervision With Ptc - ABB CM-TCN Manual

4.1.4.

Factory 4: Motor winding supervision with PTC

This profile allows motor supervision with two escalation steps. The threshold
correlates to the used PTC sensors. If the first threshold is reached, relay 1 will
trip and for the second threshold relay 2. In this profile channel 1 corelates to sig-
nal 1 and channel 2 to signal 2.
Relay 3 trips in case of sensor error for both measuring circuits.
The relays operate in closed circuit principle. Automatic reset is active for all out-
put relays.
The operating logic and the settings are displayed in the block diagram:
STATUS
Approved
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The maximum permitted cold state resistance in series is 750
Ohm.
In the signal menu the settings for threshold and hysteresis
are disabled for the corresponding signals if PTC is set as sen-
sor.
For conformity with IEC 60947-8 the equipment needs to be
switched-off in case of sensor error.
This is to be taken into consideration during the wiring or in
the device configuration.
SECURITY LEVEL
Public
S M ART T EMP ER ATUR E MONITORI NG R EL AYS
DOCUMENT ID.
2CDC112285M0201
REV. LANG. PAGE
B en 17/42