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Class 8839 58M Enclosed AC Drives
Motor Protecting Output Filters
161
09/2003
© 2000–2003 Schneider Electric All Rights Reserved
Low pass filters can be used on the output of the
Class 8839 58M Enclosed AC Drive to decease
the stress of resonant frequencies on the attached
motor. While low pass filters are not necessary for
most installations, they do provide substantial
benefits in installations involving long motor leads,
such as:
• 460 V or higher rated AC drives
• 1–25 hp rated units, if cable lead lengths are in
excess of 75 feet
• 30–400 hp rated units, if cable lead lengths are
in excess of 300 feet
• Use of a non–inverter duty rated motor(s)
• Existing general purpose motors subject to
retrofit to an AC drive
The motor protecting output filters combine
inductance, capacitance, and resistance to form a
low pass filter. This filter will lower the dV/dt levels
to prevent exciting the natural resonant wire
frequency of the motor cables. Motors compliant
to NEMA MG–1 Part 31 guidelines do not require
the use of motor protecting output filters.
Motor Protecting Output Filters:
1. Output filters are manufactured by
Trans-Coil, Inc.
2. Output filters are designed for cable lead
lengths ranging from 50 to 1000 feet.
3. Output filters include 1.5% nominal reactance
at 480 V.
4. Output filters are enclosed in Type 1 general
purpose enclosures.
5. Output filters are intended for separate
mounting and wiring by user.
HP Rating
@ 460 V
Output Filter Part No.
(Separate Mounting)
Separately Mounted
Engineered Option
1–2 KLCUL4A1 E402
3 KLCUL6A1 E402
5 KLCUL8A1 E402
7.5 KLCUL12A1 E402
10 KLCUL16A1 E402
15 KLCUL25A1 E402
20–25 KLCUL35A1 E402
30 KLCUL45A1 E402
40 KLCUL55A1 E402
50-60 KLCUL80A2 E402
75 KLCUL110A2 E402
100 KLCUL130A2 E402
125 KLCUL160A2 E402
150 KLCUL200A3 E402
200 KLCUL250A3 E402
250 KLCUL300A3 E402
300 KLCUL360A3 E402
350 KLCUL420A3 E402
400 KLCUL480A3 E402
450–500 KLCUL600A3 E402