Program features 89
Temperature monitoring using thermistor relays
A normally closed or a normally open thermistor relay can be connected to digital
input DI6.
See section Insulation on page 85.
Settings
• Parameter group 35 Motor thermal protection (page 199).
Programmable protection functions
External events (parameters 31.01…31.10)
Five different event signals from the process can be connected to selectable inputs to
generate trips and warnings for the driven equipment. When the signal is lost, an
external event (fault, warning, or a mere log entry) is generated. The contents of the
messages can be edited on the control panel by selecting Menu - Primary settings -
Advanced functions - External events.
Motor phase loss detection (parameter 31.19)
The parameter selects how the drive reacts whenever a motor phase loss is detected.
Earth (Ground) fault detection (parameter 31.20)
Note that
• an earth fault in the supply cable does not activate the protection
• in a grounded supply, the protection activates within 2 milliseconds
• in an ungrounded supply, the supply capacitance must be 1 microfarad or more
• the capacitive currents caused by shielded motor cables up to 300 meters will not
activate the protection
• the protection is deactivated when the drive is stopped.
Motor
T
Thermistor
relay
Control board
DI6
+24 V DC
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