03 POWER ELECTRONICS AND CABINET FEATURES
3BHS213401 E01 REV H
ACS1000 AIR-COOLED
USER MANUAL
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3.5.5
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 3-14: 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
100%
1
2
3
4
5
6
Summary of Contents for ACS 1013-A1
Page 1: ... MEDIUM VOLTAGE AC DRIVES ACS1000 air cooled User manual ...
Page 3: ...Contents ACS1000 air cooled User manual ...
Page 5: ... 01 About this manual 01 3 14 ...
Page 16: ......
Page 17: ... 02 Important safety information 02 15 26 ...
Page 28: ......
Page 29: ... 03 Power electronics and cabinet features03 27 50 ...
Page 53: ... 04 Control system 04 51 66 ...
Page 68: ......
Page 69: ... 05 Transportation storage and disposal05 67 74 ...
Page 76: ......
Page 77: ... 06 Mechanical installation 06 75 82 ...
Page 84: ......
Page 85: ... 07 Electrical installation07 83 106 ...
Page 108: ......
Page 109: ... 08 Commissioning 08 107 112 ...
Page 115: ... 09 Operation 09 113 126 ...
Page 129: ... 10 CDP control panel 10 127 150 ...
Page 153: ... 11 Preventive and corrective maintenance 11 151 182 ...
Page 185: ......