ETR (Electronic Thermal Relay) functions 1-4 will calculate the load when set-up where they were selected is active. For example ETR-3 starts calculating
when set-up 3 is selected. For the North American market: The ETR functions provide class 20 motor overload protection in accordance with NEC.
NB!
Danfoss recommends using 24 VDC as thermistor supply voltage.
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
Motor Current
). If the motor current exceeds nominal current, the operation time still de-
creases as if no fan were installed.
1-93 Thermistor Source
Option: Function:
Select the input to which the thermistor (PTC sensor) should be connected. An analog input option
[1] or [2] cannot be selected if the analog input is already in use as a reference source (selected in
par.3-15
Reference 1 Source
, par.3-16
Reference 2 Source
or par.3-17
Reference 3 Source
).
When using MCB112, choice [0]
None
must always be selected.
ADAP-KOOL
®
Drive Programming Guide 3 Parameter Description
MG.11.N1.02 - VLT
®
is a registered Danfoss trademark
55
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