Ghisalba VFD-E Series - Page 116

Chapter 5 Parameters
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VFD-E Series
Revision August 2006, 01EE, SW--PW V1.03/CTL V2.03 5-71
06.06 Electronic Thermal Overload Relay Selection (OL1)
Factory Setting: 2
Settings 0 Operate with a Standard Motor (self-cooled by fan)
1 Operate with a Special Motor (forced external cooling)
2 Operation disabled
 This function is used to protect the motor from overloading or overheating.
40
20
60
80
100
25 50
100 150
rated frequency of the motor %
rated current of the motor%
Standard motor
(self-cooled by fan)
rated frequency of the motor %
rated current of the motor%
Special Motor
(forced external cooling)
25 50 100 150
40
20
60
80
100
06.07 Electronic Thermal Characteristic Unit: 1
Settings 30 to 600 sec Factory Setting: 60
 The parameter determines the time required for activating the I2t electronic thermal protection
function. The graph below shows I2t curves for 150% output power for 1 minute.
1
2
3
4
5
60Hz or more
50Hz
10Hz
5Hz
0
20
40
60
80
100
120
140
160
180 200
Operation
time(min)
Load
factor (%)