Motor Protection

Enerdoor developed the Motor Protection series to protect motors from harmful overvoltage and dV/dt spikes.

Motor Protection

Enerdoor developed the Motor Protection series to protect motors from harmful overvoltage and dV/dt spikes generated on the output. This is particularly 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.  

The sine 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.

Browse Motor Protections

FIN930
  • Common mode impedance
  • Rated currents from 10 - 200A
  • Nominal voltage 600 Vac
  • Low impedance
  • Reduces dV/dt from inverter - motor
  • Long motor life
FIN950U
  • Nominal voltage 480 Vac
  • Frequency range 50 - 60 Hz
  • Insulation class H
  • Max current frequency 100 Hz
FIN5955
  • Differential mode impedance
  • Rated currents from 3 - 20A
  • Nominal voltage 600 Vac
  • Low power loss up to 250 Hz frequency output
  • Protects against voltage spikes to the motor
FIN958
  • Rated current from 12 to 110A
  • Protects against voltage spikes to the motor
  • Low power loss up to 1 kHz frequency output
FIN5980P
  • Rated currents from 9 - 110A
  • Nominal voltage 600 Vac
  • Differential mode impedance
  • Eliminates dV/dt
  • Overvoltage spikes regenerate into the DC bus
FIN960F
  • Rated currents from 7 - 500A
  • Nominal voltage 750 Vac
  • High frequency application
  • Synchronous electrosplindle application
  • No heating on the core
  • High linearity versus frequency
FINSTP
  • Nominal voltage 600 Vac 
  • Reduces dV/dt 
  • Very low power loss 
  • Easy installation
FINTR / FINFE
  • Ferrite core
  • Rated available in different sizes
  • Very high permeability ferrite
  • Plastic cover protection
FIN915SFH
  • Currents rated from 8 - 250A
  • Nominal voltage 480 Vac
  • Reduces dV/dt
  • Increases motor life
  • Very low heating for high frequency application
FIN905SF
  • Three phase sinusoidal filter
  • Rated current from 8 - 880A
  • Nominal voltage 480 Vac
  • Reduces dV/dt
  • Increases motor life
FIN5983
  • Rated currents from 12 - 60A
  • Nominal voltage 600 Vac
  • Differential mode impedance
  • Eliminates dV/dt
  • Footprint with drives manufacturers
FIN47SNB
  • Reduces dV/dT
  • Remote contact indicator
  • Compact dimensions due to the parallel installation
  • Nominal voltage 0 - 500 Vac
  • Frequency range 50 - 60 Hz
FIN900
  • Common mode impedance
  • Rated currents from 10 - 280A
  • Nominal voltage 500 Vac
  • High impedance
  • Reduces high frequency interference (PWM)
  • Cable/ screw connections available

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