TCI dv/dt Output Filter Catalog Page
Motor Protection
dv/dt
Output Filter
Superior Design, Proven Results
By combining a patented dampening circuit with a low
pass lter, V1k lters increase the voltage rise time (dt
out of dv/dt) thereby preventing voltage spikes from
exceeding 1,000 V, and protecting motor and cable
insulation.
The benets of installing a Pulse Width Modulated
(PWM) Drive, including increased energy savings and
decreased maintenance, may make it seem like the
perfect solution. But, these benets can be offset by
increases in motor failures.
Voltage wave reection is a function of the voltage rise
time (dv/dt) and the length of the motor cables.
The impedance on either end of the cable run does not
match, causing voltage pulses to be reected back in the
direction from which it arrived. As these reected waves
encounter other waves, their values add, causing higher
peak voltage.
As wire length or carrier frequency increases, the
overshoot peak voltage also increases.
Peak voltages on a 480V system can reach 1,600V and
2,100V on a 600V system. These high peak voltages can
cause a rapid breakdown of motor insulation, leading to
motor failure.
Typical Applications
• O i l a n d G a s P u m p s
• I r r i g a t i o n F i e l d , F a r m s
• W a s t e w a t e r T r e a t m e n t P l a n t s
• HVAC
• Pulp, Paper
With thousands of successful applications worldwide, the
V1k is a proven reliable solution with its industry leading
performance and benets:
• Extend the life of your motor & cable by reduction
of harmful voltage spikes due to dv/dt.
• Protect cable runs and reduce motor heating,
noise and vibration.
• Prevent motor failure with protection against
motor insulation breakdown.
• Reduce Common Mode by a minimum of 30%.
• Improve system productivity and increase
bearing life and up-time.
• Protect long lead lengths up to 3,000 feet
( d e p e n d i n g o n c a b l e a n d V F D s i z e ) .
Technical Characteristics
Technical Specications
Ratings 2 - 750 amps; 240 V - 600 V
Carrier Frequency 1 - 12 kHz
Insulation Rating 600 V Class
Insulation Class Class H (180° C) or Class R (220° C)
Efciency ≥ 98%
Lead Length
Fundamental Frequency
Specic applications can reach 3,000 feet
(consult factory for applications above 1,500 feet)
0-60 Hz (consult factory for applications over 8 kHz and/or 60 - 120 Hz
fundamental if the cable lengths exceed 400 feet)
Environmental Conditions
Operating Temperature Enclosed: 40° C (104° F)
Operating Altitude 2,000 m (6,000 ft) Derating necessary above 2,000 m
Reference Technical Standards
Agency Approvals UL & cUL
Protection (enclosure) Open, UL Type 1, UL Type 3R
Warranty One year of useful service, not to exceed 18 months from date of shipment.
Operation possible up to 120 Hz output drive frequency with derating (contact factory for details).
Voltage Without V1k
1500
1000
500
0
-500
Volts
-1000
-1500
0 3530
105
Time (ms)
15
20
Voltage With V1k
1500
1000
500
0
Volts
-500
-1000
-1500
0 5 10 15 20 25 30 35
Time (ms)
Multiple Motor Applications
MOTO R
MOTO R
VFD
Please see web site for configuration guidelines.
25
500 feet
MOTO R
500 feet
Common Mode Without V1k
1
1.5
0
-0.5
-1
Per Unit Current
0 2 4 6 8 10 12 14 16 18 20
Time (ms)
Common Mode With V1k
1
1.5
0
-0.5
-1
Per Unit Current
0 2 4 6 8 10 12 14 16 18 20
Time (ms)
Performance Guarantee
Properly sized and applied, TCI guarantees that the V1k will limit
motor terminal peak input voltage to 150% of the bus voltage with
a wire lead length of 1,000 feet and a carrier frequency of 4 kHz.
Maximum lead length and carrier frequency can vary depending on
wire lead type.
If a properly selected, installed and loaded V1k lter fails to meet
the guaranteed performance levels, TCI will provide the necessary
components or replacement lter at no additional charge.
TCI does not take responsibility for additional installation or removal
costs to include, but not limited to, replacement of third party
equipment. Please see TCI’s website for minimum requirements.
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