03 POWER ELECTRONICS AND CABINET FEATURES
3BHS206977 E01 REV H
ACS1000I AIR-COOLED
USER MANUAL
48/174
3.4.11.6
EC redundant fans – operating principles
When no EC fan failure exists, all EC fans are turned on and are running at a lower speed
(typically the minimum speed). When one EC fan fails, the second EC fan will speed up to ensure
the required cooling.
Figure 3-18: Operating principles of redundant EC fans
Both fans are running
Fan 1 fails, fan 2 increases speed
Fan 1 is stopped, Fan 2 is running at nominal speed
Fan 1 resumes operation, fan 2 decreases speed
(1) Fan 1
(2) Fan 2
(3) Drive load
(4) Nominal fan speed
(5) Reduced fan speed
(6) Minimum fan speed
For more information on parameter settings for operating times, grouping the
fans, see “Appendix G – Signal and parameter table”.
100%
1
2
3
4
5
6
Summary of Contents for ACS1000i air-cooled
Page 1: ... MEDIUM VOLTAGE AC DRIVES ACS1000i air cooled User manual ...
Page 3: ...Contents ACS1000i air cooled User manual ...
Page 5: ... 01 About this manual 01 5 16 ...
Page 16: ......
Page 17: ... 02 Important safety information 02 17 28 ...
Page 28: ......
Page 29: ... 03 Power electronics and cabinet features03 29 56 ...
Page 57: ... 04 Control system 04 57 70 ...
Page 71: ... 05 Transportation storage and disposal05 71 78 ...
Page 78: ......
Page 79: ... 06 Mechanical installation 06 79 88 ...
Page 88: ......
Page 89: ... 07 Electrical installation07 89 104 ...
Page 105: ... 08 Commissioning 08 105 110 ...
Page 110: ......
Page 111: ... 09 Operation 09 111 124 ...
Page 125: ... 10 CDP control panel 10 125 148 ...
Page 149: ... 11 Preventive and corrective maintenance 11 149 172 ...
Page 173: ......