GE Industrial Solutions AF-600 FP Fan and Pump Drive (460V_575V 150HP and above) - Manual (Page 112)

[30] Ext. Closed Loop 1
[31] Ext. Closed Loop 2
[32] Ext. Closed Loop 3
F-10 Electronic Overload
Option: Function:
The frequency converter determines the motor temperature for motor protection in two different ways:
• Via a thermistor sensor connected to one of the analog or digital inputs (par. F-12 Motor Ther-
mistor Input).
• Via calculation of the thermal load, based on the actual load and time. The calculated thermal
load is compared with the rated motor current I
M,N
and the rated motor frequency f
M,N
. The
calculations estimate the need for a lower load at lower speed due to less cooling from the fan
incorporated in the motor.
[0] No protection If the motor is continuously overloaded and no warning or trip of frequency converter is wanted.
[1] Thermistor warning Activates a warning when the connected thermistor in the motor reacts in the event of motor over-
temperature.
[2] Thermistor trip Stops (trips) the frequency converter when the connected thermistor in the motor reacts in the event of
motor over-temperature.
[3] Elec. OL Warning 1
[4] * Elec. OL Trip 1
[5] Elec. OL Warning 2
[6] Elec. OL Trip 2
[7] Elec. OL Warning 3
[8] Elec. OL Trip 3
[9] Elec. OL Warning 4
[10] Elec. OL Trip 4
Electronic Overload functions 1-4 will calculate the load when set-up where they were selected is active. For example Elec. OL Warning 3 or Trip 3 starts calculating
when set-up 3 is selected. For the North American market: The Electronic Overload functions provide class 20 motor overload protection in accordance with NEC.
AF-600 FP High Power Operating Instructions
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