Harmonic distortion can come from many sources including computers, fluorescent lights,
copiers, and six-pulse drives. The HX7, with Toshiba’s patented 18-pulse autotransformer
design, removes the distortion that would normally be generated by a six-pulse drive.
• Typically Meets IEEE-519 Guidelines without Adding Filters
• Produces a Ripple-Free Voltage on DC Bus
• Clean Sinusoidal Input Current Waveform
• Up to 60% Reduction in Transformer Losses
• Typical Total Harmonic Current Distortion (ITHD) 6 to 8%
• True Power Factor > 0.98
The Drive Solution
INPUT CURRENT HARMONICS
0
10
20
30
40
50
60
70
80
90
100
5 7 11 13 17 19 23 25 29 31 35 37 41 43 47 49
HARMONIC NUMBER
% OF FUNDAMENTAL
6-Pulse (Typical)
18-Pulse HX7 6-8% ITHD (Typical)
e: 60 Hz
@ : 113 Hz
Ch1 500mV Ch2 5.00mVΩ M2.00ms Ch1 10mV

Current

Voltage

Small Footprint

The high cost of real estate and constraints
of existing facilities make size an important
consideration in drive selection.
- 500 HP Drive Only 42” Wide
- 24” Depth on All Sizes
- Integrated Phase-Shifting Autotransformer
- Saves Real Estate on New Designs
- Easy Replacement for Old Drives
in Existing Facilities
• 60 to 200 HP: 100”H x 30”W x 24”D
• 250 to 500 HP: 100”H x 42”W x 24”D
• 600 to 800 HP: 100”H x 76”W x 24”D
(Addition of a bypass option will increase enclosure size.)
W
H
A
8
DWG NO. SH REV
B
C
D
H
G
F
E
A
C
D
E
F
G
H
76543 2 1
12345678
90.0000
30.0000
24.7500
18.0688
56978
2
32
1/5
56978E
D