The Optimal Solution for 60Hz Motor Protection

Sine 60™ (60 Hz)

CTM Magnetics Sine 60™ sine wave filters are designed for optimal performance with line frequency, 60 Hz, motors. Attenuated for PWM switching frequencies as low as 2 kHz (and up to 20 kHz), Sine 60™ (60 Hz) sine wave filters will meet your most demanding motor filtering needs for all 60 Hz applications. CTM Sine 60™ sine wave filters are available in multiple packaging configurations and come with both air and liquid cooled options.

  • Liquid-Cooling Technology
  • Military-Grade Shock/Vibration Standard
  • High Power Density

Product Options

  • Air Cooled
  • Liquid Cooled
Open-Chassis Options
  • Terminal Lead
  • Flying Leads
  • Liquid Cooled
Package Options
  • MagStand™ Cabinet
  • MagPallet™ Cabinet
  • MagPac™ VFD Integrated


VFD / Motor
VFD / Multiple Motors

CTM vs The Competition


  • Highly reliable film capacitors
  • Integrated cooling system
  • Highly efficient patented inductor technology
  • Fully liquid-cooled options
  • Military grade shock & vibration
  • No common mode noise

The Competition

  • Electrolytic capacitors
  • Cooling system not included
  • Inefficient silicon steel inductors
  • Air cooled only
  • Low shock & vibration rating
  • Produces common mode noise


Product Highlights

Efficient Design

  • No derate
  • Smallest size & optimized cost

Reliable Performance

  • Thermally protected capacitors & inductors
  • Highly efficient patented inductors & capacitors
  • No common mode noise

Plug & Play

  • Simple 3-in/3-out connection
  • No additional cooling required

Environmentally Rugged

  • Dust, wind, rain, weather proof (NEMA 3R)
  • -50 °c - +50 °c


The Optimal Solution for Motor Protection

Motor Protection:
Harmful square waves, voltage spikes, and harmonic distortion are all filtered from the inverter output, reducing motor heating, wear, and winding stress, providing critical motor protection.

Maximum Motor Lead Length:
Damaging voltage waves occur when motor lead lengths reach a characteristic length. These reflected voltage waves can cause damage to cable insulation and motors. By filtering the drive produced PWM waveform to a near perfect sine wave, CTM sine wave filters minimize harmful voltage, allowing for longer motor lead lengths (up to 15,000 feet in certain applications).

Stop Rewinding Motors:
Installing a CTM sine wave filter eliminates harmful voltage spikes, reducing insulation stress. CTM sine wave filters lessen harmonic current distortion, thereby minimizing unnecessary motor heating. By reducing winding stress and motor heat (two primary causes of motor winding failure), motor winding breakdown and failure is greatly reduced, minimizing the need to constantly rewind motors.

Extended System Life and Reliability:
CTM sine wave filters greatly reduce voltage stress and excess heat not just for the motor, but for all other load side components, greatly extending the life and reliability of the entire system.


Sine 60 Product Specs

Harmonic Distortion
<5% THVD @ 2 kHz

Voltage Range
480 V ±10%

Fundamental Frequency
6 - 70 Hz (Higher with derate)

Switching Frequency
2 - 20 kHz (above 8kHz, contact CTM)

Current Range
50 A - 1,500 A (Air Cooled) | 50 A - 2,000 A (Liquid Cooled)

Enclosure Options
Open Chassis | NEMA 3R Cabinet

Motor Cable Length
Up to 15,000 feet

Agency Recognitions
cЯUus 1446 | UL 508A

Overload Capability
150% rated current for 1 minute (Air Cooled)
200% rated current for 1 minute (Liquid Cooled)

Ambient Temperature Range
Maximum: 50 °C (122 °F) (Air Cooled) | 65 °C (149 °F) (Liquid Cooled)
Minimum: -40 °C (-40 °F) (Air & Liquid Cooled)

Preventative measures should be taken to ensure the coolant does not freeze in the system.

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