Activating motor overload – Rockwell Automation 20G PowerFlex 750-Series AC Drives User Manual
Page 171
Rockwell Automation Publication 750-RM002B-EN-P - September 2013
171
Diagnostics and Protection
Chapter 3
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%.
Activating Motor Overload
To turn on Motor Overload protection, configure P410 [Motor OL Actn]. This
activates the function. Default setting is 3 “FltCoastStop.” The following bits
configure P410 [Motor OL Actn].
•
“Ignore” (0) – No action is taken.
•
“Alarm” (1) – Type 1 alarm indicated.
•
“Flt Minor” (2) – Minor fault indicated. If running, drive continues to
run. Enable with P950 [Minor Flt Cfg]. If not enabled, acts like a major
fault.
•
“FltCoastStop” (3) – Major fault indicated. Coast to Stop.
•
“Flt RampStop” (4) – Major fault indicated. Ramp to Stop.
•
“Flt CL Stop” (5) – Major fault indicated. Current Limit Stop.
%FLA
Cold Trip Time
Hot Trip Time
105
6320
5995
110
1794
1500
115
934
667
120
619
375
125
456
240
130
357
167
135
291
122
140
244
94
145
209
94
150
180
60
155
160
50
160
142
42
165
128
36
170
115
31
175
105
27
180
96
23
185
88
21
190
82
19
195
76
17
200
70
15
IMPORTANT
If the application requires high overload current for long durations (for
example 150% for 60 seconds), heavy duty sizing (between drive and motor)
is required.