Current limiter

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to electric circuits protection devices, and can be used for electric equipment protection against short circuit currents. Current limiter contains capillary channels, filled with liquid metal, formed by bushing inner surface and located in it cylinder with cutouts on side surface along cylinder entire length. Cutouts on cylinder side surface have shape of cylinder cross section segment. Cutout shape allows to control cutting tool vertical feed only, simplifies technological process and increases current limiter functional capabilities.

EFFECT: technical result is simplification of technological process and improved functional capabilities of current limiter.

1 cl, 2 dwg

 



 

Same patents:

Current limiter // 2254636

FIELD: electrical engineering; short-circuit protective gear.

SUBSTANCE: proposed liquid-metal current limiter designed for use in up to 0.4 kV power networks to protect power loads against short-circuit currents has insulating bushing with axial bore receiving internal loosely mounted ball-shaped ceramic part of strict geometrical dimensions, and easy-to-manufacture narrow neck disposed at cross-sectional area of internal ceramic part, along its diameter and diameter of insulating bushing. Either side of bushing mounts contact leads, bellows being attached to one of them. Inner cavity of bellows and that of insulating bushing, as well as neck are filled with liquid metal.

EFFECT: reduced risk of damage to bushing and ceramic part; enlarged functional capabilities due to ability of in-service variation of narrow neck section.

1 cl, 4 dwg

The invention relates to electrical apparatus

The sensing element // 2151437

Current limiter // 2254636

FIELD: electrical engineering; short-circuit protective gear.

SUBSTANCE: proposed liquid-metal current limiter designed for use in up to 0.4 kV power networks to protect power loads against short-circuit currents has insulating bushing with axial bore receiving internal loosely mounted ball-shaped ceramic part of strict geometrical dimensions, and easy-to-manufacture narrow neck disposed at cross-sectional area of internal ceramic part, along its diameter and diameter of insulating bushing. Either side of bushing mounts contact leads, bellows being attached to one of them. Inner cavity of bellows and that of insulating bushing, as well as neck are filled with liquid metal.

EFFECT: reduced risk of damage to bushing and ceramic part; enlarged functional capabilities due to ability of in-service variation of narrow neck section.

1 cl, 4 dwg

Current limiter // 2614389

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to electric circuits protection devices, and can be used for electric equipment protection against short circuit currents. Current limiter contains capillary channels, filled with liquid metal, formed by bushing inner surface and located in it cylinder with cutouts on side surface along cylinder entire length. Cutouts on cylinder side surface have shape of cylinder cross section segment. Cutout shape allows to control cutting tool vertical feed only, simplifies technological process and increases current limiter functional capabilities.

EFFECT: technical result is simplification of technological process and improved functional capabilities of current limiter.

1 cl, 2 dwg

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