Patent EP0264314B1 successfully refreshed from Google Patents.
EP0264314B1
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Multipole differential circuit breaker with a modular assembly
Assignee: Merlin Gerin SA
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Filing: 1987-09-16
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Granted: 1993-01-20
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Expires: 2007-09-16
Abstract
Abstract Differential circuit-breaker formed by the modular assembling of a circuit-breaker unit (11) with separable contacts, and with control mechanism (18) with handle, and of a differential trigger unit (20) having a triggering relay (26), a first mechanical link (27) for triggering the mechanism (18), a second mechanical link (45) for automatic resetting of the relay (26), a test circuit (28) with test button (44), and a control for remote opening by remotely-controlled contact (46). One of the faces of the casing of the trigger unit (20) engaging with the circuit-breaker unit (11) contains openings for transverse passage of the first and second mechanical links (27, 45). The other opposite face of the casing serves alternately as support, either to a detector unit (150) enclosing a totalising transformer (21), or to an auxiliary unit (202) containing an electronic circuit (204) driven by triggering and supply signals coming from the separate detector unit (150). <IMAGE>
Inventors
- 👤 René Challande
- 👤 Michel Charbonneau
- 👤 Marc Paupert
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 02:32
CPC Classifications
H; H01; H01H; H01H83/00; H01H83/02; H01H83/04; H02; H02H; H02H3/00; H02H3/02; H02H3/05; H01H2083/045; H01H71/00; H01H71/10; H01H71/1009; H01H71/1018
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
388 words
A multipole electrical circuit breaker with earth leakage protection formed by modular side-by-side assembly of a circuit breaker unit (11) and an earth leakage trip unit (20), said circuit breaker unit (11) having a first pair of opposite side faces, and housing a multipole breaking device (12) with separable contacts (14, 16) actuated by an operating mechanism (18) operated by a handle (19) and a trip device sensitive to overload and short-circuit currents, said earth leakage trip unit sensitive to an earth leakage current having a case (62) with a second pair of opposite side faces, and housing : - a trip relay (26), - a first mechanical link (27) capable of transmitting a tripping order from the relay (26) to the operating mechanism (18) when an earth leakage fault occurs, - a second mechanical link (45) to derive from the opening movement of the handle (19) an automatic resetting movement of the relay (26), - a test circuit (28) having at least one test resistor (34, 36) in a leakage branch circuit, - a test button (44) closing of which creates an artificial earth leakage current, - a protective switch (38) designed to disconnect the test resistor and to disconnect the test resistor and to interrupt the artificial earth leakage current in the test circuit (28), after opening of the circuit breaker (10, 200) by earth leakage tripping, - one of the faces of the second pair of the case (62) of the trip unit (20) coming into engagement with the circuit breaker unit (11) comprising openings for the transverse passage of the first and second mechanical links (27, 45), characterized in that : the other face of the second pair of the case (62) of the trip unit (20) acts alternately as support : - either in the electromechanical version for a detector unit (150) containing a summing transformer (21) for detection of a residual earth leakage current, said detector unit (150) then being adjoined to the earth leakage trip unit (20), - or in the electronic version for an auxiliary unit (202) containing an electronic circuit (204) controlled by tripping and power supply signals from a detector unit (150), said auxiliary unit (202) then being adjoined to the earth leakage trip unit (20), and the detector unit (150) being separate from the trip unit (20).
Claim 2
Dependent Claim
64 words
The electrical circuit breaker according to claim 1, characterized in that the earth leakage trip unit (20) is connected by an internal electrical connection (152, 210) either to the measurement winding (24) of the transformer (21) incorporated in the detector unit (150) for the electro-mechanical version or to the board of the electronic circuit (204) of the auxiliary unit (202) for the electronic version.
Claim 3
Dependent Claim
80 words
The electrical circuit breaker according to claim 2, characterized in that the front face of the auxiliary unit (202) is equipped with an earth leakage tripping sensitivity setting selector (212), and with a time delay button (214) for setting of the earth leakage tripping delay, and that the trip unit (20) comprises a built-in remote opening mechanism by artificial earth leakage tripping, and a window (90) for visualization of earth leakage tripping, located in proximity to the test button (44).
Claim 4
Dependent Claim
91 words
The electrical circuit breaker according to one of the claims 1 to 3, characterized in that the detector unit (150) is electrically connected by a flat connecting strap (206) to a connector (208) of the electronic circuit (204) of the auxiliary unit (202) in such a way as to transmit the power supply and the earth leakage current measurement signal to the board of the electronic circuit (204) and to provide connection of the test circuit (28) with the power supply system line side and load side of the transformer (21).
Claim 5
Dependent Claim
82 words
The electrical circuit breaker according to claim 4, characterized in that the electronic circuit (204) comprises load resistors R0 to R3 of the secondary winding (24) of the transformer (21), cooperating with the setting selector (212) to select the earth leakage tripping sensitivity, said selector (212) being in connection with an auxiliary switch (232) designed to be actuated by the test button (44) to impose automatic switching of the selector (212) to the highest sensitivity when the test circuit (28) is closed.
Claim 6
Dependent Claim
113 words
The electrical circuit breaker according to claim 5, characterized in that the electronic circuit (204) comprises, in addition : - a processing circuit (218) of the earth leakage signal, controlled by an operational amplifier comparator (216) connected to the secondary winding (24) by means of the sensitivity adjustment resistors R0 to R3, - a monitoring circuit (232, 228, 230) of the secondary circuit continuity, arranged between the secondary winding (24) of the summing transformer (21) and the electronic circuit (204), - and a logic gate (224) capable of taking into account any of the tripping signals on an earth leakage or continuity fault of the secondary circuit, to control the tripping relay (26).
References Cited (Backward Citations)
No citation records indexed.
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