Allen-Bradley PowerFlex 70 Reference Manual

2-120 Motor Overload
Duty Cycle for the Motor Thermal Overload
When the motor is cold motor thermal overload will allow 3 minutes at
150%. When the motor is hot motor thermal overload will allow 1 minute at
150%. A continuous load of 102% will not trip. The duty cycle of the motor
thermal overload is defined as follows. If operating continuous at 100%
FLA, and the load increases to 150% FLA for 59 seconds and then returns
to 100%FLA, the load must remain at 100% FLA for 20 minutes to reach
steady state.
The ratio of 1:20 is the same for all durations of 150%. When operating
continuous at 100%, if the load increases to 150% for 1 second the load
must then return to 100% for 20 seconds before another step to 150%
FLA%
Cold Trip
Time
Hot Trip
Time FLA%
Cold Trip
Time
Hot Trip
Time FLA%
Cold Trip
Time
Hot Trip
Time
105 6320 5995 155 160 50 205 66 14
110 1794 1500 160 142 42 210 62 12
115 934 667 165 128 36 215 58 11
120 619 375 170 115 31 220 54 10
125 456 240 175 105 27 225 51 10
130 357 167 180 96 23 230 48 9
135 291 122 185 88 21 235 46 8
140 244 94 190 82 19 240 44 8
145 209 74 195 76 17 245 41 7
150 180 60 200 70 15 250 39 7
20 Minutes
1 Minute 1 Minute
100%
150%

Allen-Bradley PowerFlex 70 Specifications

General

Input Voltage	200-240V AC, 380-480V AC, 500-600V AC
Frequency Range	0 - 400 Hz
Humidity	5% to 95% non-condensing
Output Voltage	0 to Input Voltage
Control Methods	Sensorless Vector Control
Communications	Ethernet/IP, DeviceNet, ControlNet
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Ground Fault
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Enclosure Rating	IP20, NEMA Type 1