Schneider Electric 58 TRX Manual De Usuario

09/2003

©

 2000–2003 Schneider Electric All Rights Reserved

The Class 8839 58M Enclosed AC Drives are 
designed to operate from industrial power systems 
with normal AC line conditions without the need of 
additional line impedance from either an isolation 
transformer or a line reactor. However, when 
abnormal line conditions exist, additional line 
impedance may be required. Typically, line reactors 
are used to:

• Reduce the input rms current to the AC drive 

ratings

• Lower the available fault current on high fault 

distribution systems

• Limit the total harmonic voltage distortion from 

the AC drive at the point of common coupling to 
align with IEEE 519 guidelines

• Prevent AC drive nuisance tripping due to 

transient overvoltages from power factor 
correction capacitor switching

1. The line reactors are manufactured by 

MTE, Inc.

2. Harmonic compensated up to 150% of 

nominal current ratings

3. 5% nominal reactance

4. Refer to the following publications on the 

subject of harmonics and benefits of drive 
isolation transformers:

— 8803PD9402–Power Systems Harmonics–

Cause and Effects of AC Drives.

— 7460HO9501–Drive Isolation 

Transformers-Application, Selection and 
Specification Data

— 7460PD9501– Drive Isolation 

Transformers–Solutions to Power Quality

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