Single pole and neutral differential circuit breaker

Assignee: Merlin Gerin SA

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Filing: 1986-02-18

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Granted: 1996-09-04

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Expires: 2006-02-18

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Abstract

Abstract 1. A single pole and neutral differential circuit breaker with a moulded case (10) comprising : - a phase circuit having a pair of phase contacts (42, 44) connected to phase input (16) and output terminals (20), respectively located on the two opposing narrow side faces of the case, - a neutral circuit having a pair of neutral contacts (26, 28) juxtaposed to the phase contacts (42, 44) with an interposed insulating separating partition (24), extending parallel to the large side faces of the case, and connected to neutral input (18) and output terminals (22) adjacent to said phase terminals (16, 20), - a manual and automatic operating mechanism (60), having an electromagnetic (52) and/or thermal (58) trip device opening said contacts (26, 28; 42, 44) on a fault, - a differential transformer (66) having a phase primary winding (70), a neutral primary winding (68), and a secondary winding (72), - an electromagnetic relay (74) supplied by said secondary winding (72) and mechanically connected to said mechanism (60), characterized by the fact that said differential transformer (66) and said electromagnetic relay (74) constitute a differential unit, that said phase and neutral circuits, and said manual and automatic operating mechanism (60) with electromagnetic (52) and/or thermal (58) trip device constitute a circuit breaker unit, that said units are housed either in separate cases said side faces of which are adjoined, or in a single case with a separating interface between the circuit breaker unit and the differential unit, that the neutral circuit is adjacent to the differential unit, that said comprises a lower part housing said phase (42, 44) and neutral contacts (26, 28) and that the connecting conductors of the neutral circuit (38, 40) and of the phase circuit (54, 56) to the differential unit extend transversely to said interface or to said adjoined side faces, the neutral circuit connecting conductors (38, 40) being in said lower part of the case, and the phase circuit connecting conductors (54, 56) above this lower part.

Inventors

👤 William Bartolo
👤 Yves Belin
👤 Yves Bonhomme
👤 Michel Lazareth
👤 Gérard Pion Roux

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-07 20:51

CPC Classifications

H; H01; H01H; H01H83/00; H01H83/20; H01H83/22; H01H83/226; H01H71/00; H01H71/002

Claims Analysis

Total Claims: 6

Claim 1

Independent Claim 328 words

A single pole and neutral differential circuit breaker with a moulded case (10) comprising : - a phase circuit having a pair of phase contacts (42, 44) connected to phase input (16) and output terminals (20), respectively located on the two opposing narrow side faces of the case, - a neutral circuit having a pair of neutral contacts (26, 28) juxtaposed to the phase contacts (42, 44) with an interposed insulating separating partition (24), extending parallel to the large side faces of the case, and connected to neutral input (18) and output terminals (22) adjacent to said phase terminals (16, 20), - a manual and automatic operating mechanism (60), having an electromagnetic (52) and/or thermal (58) trip device opening said contacts (26, 28, 42, 44) on a fault, - a differential transformer (66) having a phase primary winding (70), a neutral primary winding (68), and a secondary winding (72), - an electromagnetic relay (74) supplied by said secondary winding (72) and mechanically connected to said mechanism (60), circuit breaker in which said differential transformer (66) and said electromagnetic relay (74) constitute a differential unit in which that said phase and neutral circuits, said manual and automatic operating mechanism (60) with electromagnetic (52) and/or thermal (58) trip device constitute a circuit breaker unit, and in which that said units are housed either in separate cases said side faces of which are adjoined, or in a same case with a separating interface same between the circuit breaker unit and the differential unit, electric connecting conductors between said units extending transversely to said interface or faces, characterised in that the neutral circuit is adjacent to the differential unit, that said case comprises a lower part housing said phase (42, 44) and neutral contacts (26, 28) and that the said connecting conductors (38, 40) of the neutral circuit are arranged in said lower part of the case, and that the phase circuit connecting conductors (54, 56) are arranged above this lower part.

Claim 2

Dependent Claim 53 words

The circuit breaker according to claim 1, characterized by the fact that the case (10) comprises an upper part housing said mechanism (60) and that the connecting conductors (56, 58) of the phase circuit to the differential unit extend transversely to said interface or to said adjoined side faces in said upper part.

Claim 3

Dependent Claim 52 words

The circuit breaker according to claim 1 or 2, characterized by the fact that the phase primary winding (70) is connected on the one hand to one of the ends of the electromagnetic trip device coil (52) and on the other hand to the free end of the thermal trip device (58).

Claim 4

Dependent Claim 45 words

The circuit breaker according to claim 1, 2 or 3, characterized by the fact that said mechanism (60) is located above the partition (24) separating the contacts (26, 28, 42, 44) the height of which is limited to the lower part of the case (10).

Claim 5

Dependent Claim 77 words

The circuit breaker according to claim 1, 2, 3 or 4, characterized by the fact that the circuit breaker unit is a standard single pole and neutral circuit breaker, fitted in a widened case (10) for adjacent housing of the differential unit (64), the circuit breaker and differential units being connected by four electrical connections (38, 40, 54, 56) and two mechanical connections (76) respectively for tripping and resetting, said connections being internal to the case (10).

Claim 6

Dependent Claim 66 words

The circuit breaker according to claim 1, 2, 3 or 4, characterized by the fact that the circuit breaker unit is a standard single pole and neutral circuit breaker with a openings for electrical (38, 40, 54, 56) and mechanical connections (76) to pass through and that the differential unit (64) is housed in a case of the same profile adjoined to said large side face.

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