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January 2018 – Enerdoor’s Motor Protection Range

Published on: 22/01/2018

Introducing Enerdoor’s motor protection range

Enerdoor’s Motor Protection Range

Enerdoor has developed a Motor Protection Series to protect motors from harmful overvoltage and dV/dt spikes generated on the output. This is particular useful for applications with variable frequency drives and servo-motors.

This series includes common mode and differential mode inductances, sine wave filters and snubbers designed to work with various frequency switches, output frequencies and applications.


Enerdoor’s Motor Protection Range

The sin wave filter series reduces the pulse wave modulation (PWM) effect, converts the PWM to a sine wave and reduces dV/dt. The FIN915SF model is used with fundamental frequencies up to 2 kHz. The high frequency inductance FIN960F is a unique solution used for synchronous spindle motor applications.

Enerdoor FIN47SNB.50.1M Snubber Motor Protection for dV/dt

FIN47SNB.50.1M Snubber Motor Protection for dV/dt

  • Reduces dV/dt
  • Remote contact indicator
  • Compact dimensions due to the parallel installation
  • Nominal voltage 0-500Vac
  • Frequency range 50-60Hz


Enerdoor FIN5983 Output Filter

FIN5983 Output Filter

  • Rated currents from 12-60A
  • Nominal voltage 600Vac
  • Differential mode impedance
  • Eliminates dV/dt
  • Footprint with drives manufacturers


Enerdoor FINSTP Star Point Snubber

FINSTP Star Point Snubber

  • Nominal voltage 600Vac
  • Reduces dV/dt
  • Very low power loss
  • Easy installation


Enerdoor FIN900 Output Filter

FIN900 Output Filter

  • Common mode impedance
  • Rated currents from 10-280A
  • Nominal voltage 500Vac
  • High impedance
  • Reduces high frequency interference (PWM)
  • Cable/screw connections available


Enerdoor FIN930 Output Filter

FIN930 Output Filter

  • Common mode impedance
  • Rated currents from 10-200A
  • Nominal voltage 600Vac
  • Low impedance
  • Reduces dV/dt from inverter motor
  • Long motor life


Enerdoor FIN950U Load Reactor Filter

FIN950U Load Reactor Filter

  • Nominal Voltage 480Vac
  • Frequency range 50-60Hz
  • Insulation class H
  • Max current frequency 100Hz


Enerdoor FIN960F Output Filter

FIN960F Output Filter

  • Rated currents from 7-500A
  • Nominal voltage 750Vac
  • High frequency application
  • Synchronous electrosplindle application
  • No heating on the core
  • High linearity versus frequency


Enerdoor FIN905SF Sine Wave Filter

Three phase sinusoidal filter

  • Rated current from 8-880A
  • Nominal voltage 480Vac
  • Reduces dV/dt
  • Increases motor life


Enerdoor FIN915SFH High Frequency Sine Wave Filter

FIN915SFH High Frequency Sine Wave Filter

  • Currents rated from 8-250A
  • Nominal voltage 480Vac
  • Reduces dV/dt
  • Increases motor life
  • Very low heating for high frequency application


Enerdoor FINTR Toroid and FINFE Ferrite

FINTR Toroid and FINFE Ferrite

  • Ferrite core
  • Rated available in different sizes
  • Very high permeability ferrite
  • Plastic cover protection


GD Rectifiers is an authorised distributor for the Enerdoor Group, and stock their complete range of: Motor Protection, Harmonic Filters, Power Factor Correction, Surge Arresters, Voltage Stabilisers and EMI/RFI/EMC Filters.

Explore the complete range of Enerdoor products here


For further information on all Enerdoor products please call GD Rectifiers on: 01444 243 452 or email:


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