User`s manual

FP5/GP5 User’s Manual 63
Chapter 3 - Programming Features
FP5/GP5 Operation
·General-purpose and Blower-cooled Motors
Induction motors are classified as general-purpose or blower-cooled
motors, based on their cooling capabilities. Hence, the motor overload
detection function operates differently for each of these two motor types.
Cooling Effectiveness Torque Characteristics
Electronic Thermal
Overload
General-purpose
Effective when operated at
50/60Hz from commercial
power supply.
During continuous operation at low
speeds, the load must be limited in
order to limit motor temperature rise.
“OL1” error (motor overload
protection is enabled when
motor is continuously oper-
ated at 50/60Hz or less at
100% load).
Blower-cooled
Effective when operated at
low speeds (approx. 6Hz).
Use blower-cooled motor for contin-
uous operation at low speeds.
Effective when operated at
low speeds (approx. 6Hz).
180
155
100
55
38
0
3
60
120
Load (%)
60s
Short time
Standard
Rating
Frequency (Hz)
Base Frequency 60Hz
(V/f for 60Hz, 230V Input Voltage)
20
140
80
180
150
100
55
38
0
6
60
120
Load (%)
60s
Short time
Standard
Rating
Frequency (Hz)
Base Frequency 60Hz
(V/f for 60Hz, 230V Input Voltage)
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