How to ensure a long service life of a contactor?

To avoid wearing out of the contacts and thus achieve a long service life, the contactor must be able to switch high DC voltages and currents while reducing the dissipative power in the interior to an absolute minimum. Especially during emergency switch off under load, the contactor must not fail.

Do contactors need gas filling?

Furthermore, contactors need gas filling for excellent extinguishing characteristics. To avoid wearing out of the contacts and thus achieve a long service life, the contactor must be able to switch high DC voltages and currents while reducing the dissipative power in the interior to an absolute minimum.

How do gas-filled contactors work?

Gas-filled contactors with two fixed contacts and one moveable bridge employ all methods mentioned above. The arc length is increased by the moving bridge and by magnetic deflection using permanent magnets. The arc is separated into two segments and is cooled by using a high-pressure hydrogen gas mixtures.

How TDK HVC gas-filled contactors are cooled?

The arc is separated into two segments and is cooled by using a high-pressure hydrogen gas mixtures. The new TDK HVC gas-filled contactors exhibit excellent arc quenching properties by pushing the arc cooling mechanism to a maximum.

Why do high voltage contactors need gas filling?

The critical factors for modern high-voltage contactors are small size and low weight in combination with high-performance switching capability. Furthermore, contactors need gas filling for excellent extinguishing characteristics.