Johnson Controls VSD Series User Manual

VSD Series Drives User Manual Powered by Eaton Technology
A-4 For more information visit: www.johnsoncontrols.com LIT-1201828
November 2009
Table A-4: 575V VT Output Power Ratings

Insert a “1” for TYPE 1 or a “2” for TYPE 12 in place of the “x” in the Catalog Number.
Power Loss and Switching Frequency
In some situations it may be desirable to change the switching frequency of the VSD Series
drive for some reason (typically e.g. to reduce the motor noise). Raising the switching
frequency above the factory default level increases the drive power loss and increases the
cooling requirements. Figures A-1 through A-6 illustrate the power loss increase for the
different VSD Series models. When operating above the default switching frequency, the
VSD Series output current rating should be derated by the ratio of the increased power loss
to the nominal power loss.
Example: The user of a 40 hp, 61A, 480V VSD Series drive wishes to increase the switching
frequency from the factory default value of 10 kHz to 15 kHz to reduce motor noise. From
Figure A-3 the loss at the factory default switching frequency of 10 kHz is 1240 watts. The loss
at 15 kHz from Figure A-3 is 1340 watts.
Thus at the increased switching frequency, the maximum load allowed is 56A to avoid
overheating the VSD Series drive.
Catalog Number

Frame Size
Three-Phase Input
Horsepower Current
VS0035x0A_
VS0055x0A_
VS0075x0A_
VS0105x0A_
FR6 3
5
7-1/2
10
4.5
7.5
10
13.5
VS0155x0A_
VS0205x0A_
VS0255x0A_
VS0305x0A_
15
20
25
30
18
22
27
34
VS0405x0A_
VS0505x0A_
FR7 40
50
41
52
VS0605x0A_
VS0755x0A_
VS1005x0A_
FR8 60
75
100
62
80
100
VS1255x0A_
VS1505x0A_
VS2005x0A_
FR9 125
150
200
125
144
208
Re rate = 61 x
1240
= 56A
1340

Johnson Controls VSD Series Specifications

General

Brand	Johnson Controls
Model	VSD Series
Category	DC Drives
Language	English