NB!
Check that the chosen supply voltage follows the specification of the used thermistor element.
Select
ETR Warning 1-4
, to activate a warning on the display when the motor is overloaded.
Select
ETR Trip 1-4
to trip the frequency converter when the motor is overloaded.
Programme a warning signal via one of the digital outputs. The signal appears in the event of a warning and if the frequency converter trips (thermal
warning).
ETR (Electronic Terminal Relay) functions 1-4 will calculate the load when the set-up where they were selected is active. For example ETR starts calculating
when setup 3 is selected. For the North American market: The ETR functions provide class 20 motor overload protection in accordance with NEC.
1-91 Motor External Fan
Option:
Function:
[0]
*
No
No external fan is required, i.e. the motor is derated at low speed.
[1]
Yes
Applies an external motor fan (external ventilation), so no derating of the motor is required at low speed. The
graph below is followed if the motor current is lower than nominal motor current (see par. 1-24). If the motor
current exceeds nominal current, the operation time still decreases as if no fan were installed.
FC 300 Programming Guide
2. How to Programme
MG.33.M3.02 - VLT
®
is a registered Danfoss trademark
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