AC / DC filter resistors

Alternating current / direct current – DC

High power electrical installations, for use by industrial direct currents , often generate disturbances on the networks. These disturbances will then modify the behavior of the sensors and trigger the electrical safety devices. To improve the quality of the signal and therefore the efficiency of the installations, the objective is to remove unwanted harmonics.

A role played by filter resistors.

METAL DEPLOYE RESISTOR offers a range of filter resistors, discharge resistors and pre-insertion resistance (PIR) as an electrical signal improvement solution.

Filter, discharge & PIR resistors

HVDC system: transmission of electricity as high-voltage direct current

In HVDC LCC (back to back / point to point), the converter stations are polluted with numerous harmonic distortions which must then be filtered: filter alternating current – AC and direct current – DC .

When the station is powered on HVDC VSC , the pre-insertion resistor limits the charging current of the capacitors and the cable. When the station stops, the DC cable remains charged (High capacity), the energy must be discharged into a resistor (cable discharge).

When VSC is connected to wind farms for example, if the AC grid is faulty and cannot receive power, the wind turbines must be slowed down (DC Chopper).

A wide range of filter resistors

METAL DEPLOYE RESISTOR is at your disposal to define the specific parameters linked to your resistance needs, depending on the market.

✓ French know-how
✓ Global standing
✓ An answer for all powers and tensions
✓ Certification and quality standard
✓ Constant innovation with a test laboratory and an R&D unit


Any power | Any voltage

Resistors of
pre-insertion (PIR)

Any power | Any voltage

DC Chopper

Any power | Any voltage

Our range of resistors meets the international standards .