Setting Parameters
09/01 AWB8230-1412GB
98
Electronic motor protection
The DF5 series frequency inverters can monitor the temperature of
connected motors with an electronic bimetallic relay. With
PNU b12, you can match the electronic motor protection to the
rated current of the motor. If the values entered here exceed the
rated motor current, the motor cannot be monitored with this
function. In this case, PTC thermistors or bimetal contacts in the
motor windings must be used.
PNU Name Adjustable in
RUN mode
Value Function WE
b12 Tripping current for
electronic motor
protection device
– 0.5 to 1.2 x I
e
Setting range of the tripping current as a multiple of the frequency
inverter rated current, i.e. the range is given in amperes (A).
I
e
1)
b13 Characteristic for
electronic motor
protection device
– The electronic thermal protection of the motor in the low speed range can be increased
to improve thermal monitoring of the motor at low frequencies.
I: Output current
01
00 Enhanced motor protection
01 Constant motor protection
1) Inverter rated current
60
80
100
5 20 50 100
00
01
I
[%]
f
[Hz]
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