• 0.75HP, 2A, Motor Protection Filter, open chasis, 480V, V1K2A00


0.75HP, 2A, Motor Protection Filter, open chasis, 480V, V1K2A00




V1k provides Motor Protection by limiting voltage spokes below 1,000 volts for long lead applications.

  • Greatly extends the life of the motor and cable
  • Specific applications can reach 3,000 feet
  • 30% reduction in common mode current

The V1k is the newest generation of the KLC dv/dt filter series. V1k filters are UL Listed and available from EmotronDirect in Open, Type 1 and Type 3R packaging configurations.



As Pulse Width Modulation (PWM) Drives are incorporated into various applications and processes, the increased energy savings and decreased maintenance on Drives can be offset by increases in motor failures.

The KLC-Series V1k product family has been designed as an engineered solution for motor failures due to the reflected wave phenomenon.



Voltage wave reflection 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 reflected back in the direction from which it arrived. As these reflected 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 460V system can reach 1200 to 1600V, causing rapid breakdown of motor insulation, leading to motor failure. On 575V systems, the peak voltages can easily reach 2100V. If this is left uncontrolled, insulation failure may occur.



By combining a patented dampening circuit with a low pass filter, V1k filters:

  • Increase the voltage rise time (dt out of dv/dt)
  • Prevent voltage spikes from exceeding 1,000 V
  • Slow pulse transitions, reduce dv/dt
  • Protect motor and cable insulation


      Voltage without V1k
      Voltage w/o V1k


      Voltage with V1k
      Harmonic Current w/ KDR



      Common Mode current, which leads to bearing pitting and bearing fluting, is reduced by a minimum of 30%. V1k filters:

      • Slow down the pulse dv/dt by a factor of 3, reducing the harmful common mode currents
      • Increase bearing life and up-time
      • Reduce common mode noise and currents



      Common Mode without V1k
      Common Mode w/o V1k


      Common Mode with V1k

      Common Mode w/ V1k


      The V1k prevents voltage spikes from exceeding 1,000 V up to 2,000 feet and limits dv/dt to less than 1,000 V/ μs. The product has been used successfully in applications up to 3,000 feet depending on cable and VFD sizes.



      • Provide sufficient ventilation
      • Mount the unit within ten (wife) feet from the drive
      • Ensure the VFD's carrier frequency is set to 4 kHz or below and the operating frequency is set to 60 Hz or below
      • Connect VFD output leads to the A1, B1, and C1 terminations of the V1k unit. A2, B2, and C2 service the wire to the motor.
      • The length of each motor lead should be less than 500 feet and the sum total of all the leads should be less than 1,500 feet
      • The total number of motors should be 10 or below





      Product Series/Model # V1K2A00
      Input Voltage 480V
      Horsepower 0.75HP
      Rated Current 2A
      Enclosure Rating open chasis
      Weight (lbs.) 8.0
      Dimensions (H x W x D) 9 x 5.5 x 7.25 in.
      Max. Altitude 2,000 meters (6,000 feet); De-rating necessary above 2,000 meters
      Carrier Frequency 2 - 4 kHz
      Fundamental Frequency 0 - 60 Hz (consult EmotronDirect for applications over 6 kHz and/or 6- - 120 Hz fundamental if the cable lengths don't exceed 400 feet)
      Efficiency 98%
      Insulation Rating 600V Class
      Insulation Class Class H (180°C) or Class R (220°C)
      Ambient Temperature 40° C (104° F)
      Short-Term Overload Rating Tolerate 200% rated I for a minimum of 3 minutes
      Approvals cUL, UL
      Lead Length Specific applications can reach 3,000 feet (consult factory for applications above 1,500 feet)



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