VFD & Motor Protection

Harmonic frequencies result from nonlinear electronic switching devices, such as variable frequency drives (VFDs), and flow into electrical systems causing increased wear and tear on motors, increased electrical usage and power quality problems.

Harmonic filters are designed to eliminate harmonic distortion caused by excess currents in and out of a VFD. They are made up of an array of inductors, capacitors and resistors that are capable of deflecting harmonic currents, sending them to ground. Passive harmonic filters are a series inductor-capacitor resonant circuit that is tuned to a specific frequency and connected with a VFD in parallel. The filter offers low impedance at the resonant frequency and sends the tuned harmonic to ground. Active harmonic filters are not designed for a specific situation as the passive filters, but can adjust dynamically to the demand for harmonic correction.

Line reactors protect VFDs from input power line disturbances by smoothing and slowing down incoming voltage distortion. They also reduce harmonics generated by the VFD that travel back into the power line. A line reactor is coil of wire that forms a magnetic field that current flows through. The magnetic field limits the rate of the rise of the current, reducing harmonics.

Load reactors are placed on the load side of a VFD to help protect motors from damage when noise spikes are produced along long cable lengths, which tend to amplify the noise. They also dampen the rate of the change of voltage that is applied to the motor windings, which improves motor performance.

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$1070.84
<p>CoolBlue N123HP1632 + -4Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.</p>
$1070.84
CoolBlue N123HP1632 + -3Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1070.84
CoolBlue N123HP1632 + -2Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1070.84
CoolBlue N123HP1632 + -1Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$611.92
CoolBlue N75HP429-1631-4Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$611.92
CoolBlue N75HP429-1631-3Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$611.92
CoolBlue N75HP429-1631-2Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$611.92
CoolBlue N75HP429-1631-1Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue N57HP103-428-4Core-950CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue N57HP103-428-3Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue N57HP103-428-2Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue N57HP103-428-1Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$114.72
CoolBlue N29HP41-102-4Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$114.72
CoolBlue N29HP41-102-3Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$114.72
CoolBlue N29HP41-102-2Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$114.72
CoolBlue N29HP41-102-1Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$76.48
CoolBlue N18HP11-40-4Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$76.48
CoolBlue N18HP11-40-3Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$76.48
CoolBlue N18HP11-40-2Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$76.48
CoolBlue N18HP11-40-1Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$38.24
CoolBlue N18HP1/4-10-5Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$38.24
CoolBlue N18HP1/4-10-4Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$38.24
CoolBlue N18HP1/4-10-3Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$38.24
CoolBlue N18HP1/4-10-2Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$2677.08
CoolBlue CBO326HP1632+A23-8Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$2677.08
CoolBlue CBO326HP1632+A23-6Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$2677.08
CoolBlue CBO326HP1632+A23-4Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$2677.08
CoolBlue CBO326HP1632+A23-4Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1223.80
CoolBlue CBR166HP429-1631A16-8Core-600CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1223.80
CoolBlue CBR166HP429-1631A16-6Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1223.80
CoolBlue CBR166HP429-1631A16-4Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1223.80
CoolBlue CBR166HP429-1631A16-4Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1070.85
CoolBlue CBO155HP101-428A12-8Core-600CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1070.85
CoolBlue CBO155HP101-428A12-6Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1070.85
CoolBlue CBO155HP101-428A12-4Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$1070.85
CoolBlue CBO155HP101-428A12-4Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue CBO68HP51-100A6-8Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue CBO68HP51-100A6-6Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue CBO68HP51-100A6-4Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$458.92
CoolBlue CBO68HP51-100A6-4Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$152.96
CoolBlue CBO43HP1/4-50A4-4Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$152.96
CoolBlue CBO43HP1/4-50A4-8Core-900CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$152.96
CoolBlue CBO43HP1/4-50A4-6Core-450CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$152.96
CoolBlue CBO43HP1/4-50A4-4Core-300CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$152.96
CoolBlue CBO43HP1/4-50A4-10HP-2Core-150CordMax Inductive Absorbers reduce or eliminate motor bearing damage in VFD driven motors. Made from nanocrystalline Nanoperm. Supresses circulating currents and damaging bearing currents. By reducing transient voltages, straight capacitive currents, and common node currents before they reach the motor, it saves the motor from damage. Stops grounding brushes or hybrid bearings, lasts a lifetime with easy installation or retrofit.
$25573.00
MotorShield (MSD) sine wave filter greatly extends motor and cable life from harmful VFD PWM drives. UL Listed Type 1/3R, Open UL 508 good for up to 15,000ft. cable leads. a 3-phase low-pass sine wave filter designed and developed by TCI to deliver conditioned power to motor loads driven by PWM drives with switching frequencies from 2 kHz to 16 kHz. Any drive control parameter which has the effect of reducing the carrier or switching frequency below 2 kHz at any time must be disabled. Some sine wave or long lead mode drive parameters or operating modes can have this effect. This filter is suitable for VFD drives configured to Volts per Hz modes only. Available for three phase voltage systems up to 460/480 Volts, the MotorShield™ is a passive LC filter connected in series with the output terminals of the variable frequency drive. This design removes the carrier frequency distortion from the output voltage waveform resulting in a nearly pure sine wave voltage profile. The MotorShield™ sine wave filter reduces the effects of the reflected wave phenomenon (dV/dt), which can cause motor heating, insulation damage, and excessive audible noise. The reduction of high frequency VFD output currents extends the life of motors and transformers and eliminates the need for special motor cables. The MotorShield™ reduces VFD ground fault problems and noise interference in transducer signals caused by stray high frequency harmonic currents.
$23871.00
MotorShield (MSD) sine wave filter greatly extends motor and cable life from harmful VFD PWM drives. UL Listed Type 1/3R, Open UL 508 good for up to 15,000ft. cable leads. a 3-phase low-pass sine wave filter designed and developed by TCI to deliver conditioned power to motor loads driven by PWM drives with switching frequencies from 2 kHz to 16 kHz. Any drive control parameter which has the effect of reducing the carrier or switching frequency below 2 kHz at any time must be disabled. Some sine wave or long lead mode drive parameters or operating modes can have this effect. This filter is suitable for VFD drives configured to Volts per Hz modes only. Available for three phase voltage systems up to 460/480 Volts, the MotorShield™ is a passive LC filter connected in series with the output terminals of the variable frequency drive. This design removes the carrier frequency distortion from the output voltage waveform resulting in a nearly pure sine wave voltage profile. The MotorShield™ sine wave filter reduces the effects of the reflected wave phenomenon (dV/dt), which can cause motor heating, insulation damage, and excessive audible noise. The reduction of high frequency VFD output currents extends the life of motors and transformers and eliminates the need for special motor cables. The MotorShield™ reduces VFD ground fault problems and noise interference in transducer signals caused by stray high frequency harmonic currents.
$20980.00
MotorShield (MSD) sine wave filter greatly extends motor and cable life from harmful VFD PWM drives. UL Listed Type 1/3R, Open UL 508 good for up to 15,000ft. cable leads. a 3-phase low-pass sine wave filter designed and developed by TCI to deliver conditioned power to motor loads driven by PWM drives with switching frequencies from 2 kHz to 16 kHz. Any drive control parameter which has the effect of reducing the carrier or switching frequency below 2 kHz at any time must be disabled. Some sine wave or long lead mode drive parameters or operating modes can have this effect. This filter is suitable for VFD drives configured to Volts per Hz modes only. Available for three phase voltage systems up to 460/480 Volts, the MotorShield™ is a passive LC filter connected in series with the output terminals of the variable frequency drive. This design removes the carrier frequency distortion from the output voltage waveform resulting in a nearly pure sine wave voltage profile. The MotorShield™ sine wave filter reduces the effects of the reflected wave phenomenon (dV/dt), which can cause motor heating, insulation damage, and excessive audible noise. The reduction of high frequency VFD output currents extends the life of motors and transformers and eliminates the need for special motor cables. The MotorShield™ reduces VFD ground fault problems and noise interference in transducer signals caused by stray high frequency harmonic currents.