CURRENT PROTECTION DEVICE FOR LOW-VOLTAGE THREE-PHASE ELECTRICAL INSTALLATION Russian patent published in 2023 - IPC H02H3/08 

FIELD: electrical engineering; power engineering.

SUBSTANCE: invention is intended to protect low-voltage three-phase electrical installations in networks with a short-circuited neutral from short circuits. The measuring transducer and the reacting element are made in form of a housing made of insulating material, on which two fixed contacts and four prismatic ferrimagnetic magnetic cores located in parallel are fixed, with a rotating spring-loaded armature with two movable contacts, while the phases of the current conductor of this electrical installation are placed between the magnetic cores, the armature with an air gap is placed at their ends, and the movable contacts associated with it, after its rotation, close the fixed contacts, which are connected to the electrical circuit from the power source and the remote release coil of the circuit breaker.

EFFECT: simplification of implementation and increase of reliability of operation of the current protection device, as well as expansion of scope of its use.

1 cl, 2 dwg