Schneider Electric 58 TRX User Manual
Class 8839 58M Enclosed AC Drives
Three Phase Drive Isolation Transformers
162
09/2003
©
2000–2003 Schneider Electric All Rights Reserved
Drive Isolation transformers are designed for maximum benefit when applied to an AC drive.
In addition to the functional comparison of a line reactor, drive isolation transformers are normally used
for one of the following reasons over a standard line reactor:
In addition to the functional comparison of a line reactor, drive isolation transformers are normally used
for one of the following reasons over a standard line reactor:
1. Match system voltage to drive rating.
2. Meet local or plant codes that require isolation.
3. Capable of correcting line voltage unbalance conditions commonly seen with open delta and corner
grounded delta distribution systems.
4. Provides continuity of service for nuisance grounding.
5. Reduces drive induced currents in supply feeder ground and limit ground fault currents.
6. Isolate the electrical common mode noise generated in solid state controllers from the distribution
system.
The Class 8839 58M Enclosed AC drives have a high fault withstand capability (up to 65,000 A or
100,000 A depending upon configuration). For these reasons, Square D does not require the use of a
drive isolation transformer for isolation purposes unless the system requires one or more of the six
functions listed above.
100,000 A depending upon configuration). For these reasons, Square D does not require the use of a
drive isolation transformer for isolation purposes unless the system requires one or more of the six
functions listed above.
Notes:
To complete catalog number: Select the voltage required from chart. Insert the voltage code number in
place of the ( ) in the catalog number
place of the ( ) in the catalog number
Three Phase 60 Hz Class B (IEEE 597-1983)
HP Rating
kVA
Catalog Number
1–5
7.5
7T( )HDIT
7.5
11
11T( )HDIT
10
15
15T( )HDIT
15
20
20T( )HDIT
20
27
27T( )HDIT
25
34
34T( )HDIT
30
40
40T( )HDIT
40
51
51T( )HDIT
50
63
63T( )HDIT
60
75
75T( )HDIT
75
93
93T( )HDIT
100
118
118T( )HDIT
125
145
145T( )HDIT
150
175
175T( )HDIT
200
220
220T( )HDIT
250
275
275T( )HDIT
300
330
330T( )HDIT
400
440
440T( )HDIT
450
550
550T( )HDIT
500
550
550T( )HDIT
Voltage Codes
Code
Primary
Secondary
142
230 Delta
230Y/132
143
230 Delta
460Y/265
144
460 Delta
230Y/132
145
460 Delta
460Y/265
146
575 Delta
230Y/132
147
575 Delta
460Y/265