SINE WAVE FILTER

Pulse width modulation (PWM), the output waveform Features of MSD Sine Wave Filter:
of a VFD, can be used to control the amount of power
• Strong durable components capable of handling
delivered to the motor. The PWM waveform resembles
a square wave form that is not ideal for operating harsh environments
motors. As the PWM increases so does the voltage • Suitable for lead lengths up to 15,000 ft.
causing voltage spikes in excess of 1,600 V. These high
peak voltages will cause a rapid breakdown of motor • 240 - 600 VAC system compatibility
insulation, leading to motor failure. • 5 - 960 Amps range
• Cost effective, maintenance-free filter design -
TCI’s MotorShield (MSD) sine wave filters are used
no mechanical adjustments needed
on the output of a VFD/drive to filter the PWM carrier
frequency converting it into a clean voltage waveform. • cULus Listed
The MSD is suitable for carrier frequencies from 2 - 16
kHz. The MSD offers an added level of protection to
your motor with minimal voltage drop.

Typical Applications
• Oil & Gas - hole pumps/deep well drilling
• HVAC Systems - fans and blowers
• Step up Transformers
• Mining Fields
• Material Handling
Technical Specifications Part Numbering
240 V: 5 - 248 Amps MS D 0160 A 3 00
480 V: 5 - 1080 Amps
Current Ratings Series:
600 V: 8 - 500 Amps
UL Rating:
Intermittent overload current of 150% for
1 minute out of every 60 minutes MSD - UL 508
MSN - Non-UL
240 V, 480 V and 600 V, 3-phase, at fundamental
VFD Output Voltage Current Rating:
base frequency configured to Volts per Hz
Voltage Rating:
VFD Output Frequency Up to 80 Hz
A - 480 V
VFD Carrier Frequency 2 kHz to 16 kHz B - 240 V
Maximum peak voltage of output waveform C - 600 V
480 V models: 815 V, Enclosure:
600 V models: 1,018 V 0 - Open
Filter Performance
Maximum dV/dt of output waveform 3 - Type 1 / 3R
480 V models: 5 V/μs, Option:
600 V models: 6 V/μs
00 - Default
Environmental Conditions
6,600 ft (2,000 m), derating required for
Maximum Elevation
operation above this level Motor Input Waveform Without MSD
-30 °C (-22 °F) to 40 °C (104 °F) 1500

Operating Temp Cooling provisions required for operation 1000

above this temperature 500

Ambient Storage Temp -40 °C (-40 °F) to 50 °C (122 °F) Volts

0

-500
Maximum Humidity 95%, non-condensing -1000

Reference Technical Standards -1500

0 5 10 15 20 25 30 35 40

Enclosure Options UL Open and Type 1/3R enclosure Time (ms)

3% at nominal voltage, frequency
Voltage Drop
and rated current Motor Input Waveform With MSD
Capacitors High endurance design (no PCBs) 1500

1000
Agency Approvals UL & cULus Listed (up to 480 amps) 500
Volts

Typical MSD Application -500

-1000

-1500
0 5 10 15 20 25 30 35 40

Time (ms)

MSD MOTOR

VFD

Performance Guarantee - Properly sized and applied, the addition of a MotorShield Sine Wave Output Filter is guaranteed to bring the
application into compliance with NEMA Standards Publication No. MG-1 Part 31. If the system fails to meet MG-1 Part 31 standards with
the addition of a MotorShield filter, TCI will take back the output filter and pay shipping both ways. This offer is valid for 60 days from the
installation date.

TCI, LLC
W132 N10611 Grant Drive Part #29404
Version 2
Germantown, WI 53022 ©2019
800-824-8282 | www.transcoil.com