EP0715327B1 - Dispositif anti-déclassement en calibre d'un disjoncteur suite à l'adaption d'un auxiliaire - Google Patents
Dispositif anti-déclassement en calibre d'un disjoncteur suite à l'adaption d'un auxiliaire Download PDFInfo
- Publication number
- EP0715327B1 EP0715327B1 EP95410119A EP95410119A EP0715327B1 EP 0715327 B1 EP0715327 B1 EP 0715327B1 EP 95410119 A EP95410119 A EP 95410119A EP 95410119 A EP95410119 A EP 95410119A EP 0715327 B1 EP0715327 B1 EP 0715327B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- auxiliary
- actuator
- bosses
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
Definitions
- the present invention relates to an anti-derating device for a circuit breaker following the adaptation of an auxiliary such as in particular a differential protection device, this device comprising the circuit breaker and the auxiliary, this circuit breaker being provided with at least one adjusting screw arranged to perform a initial setting of a thermal release and define the thermal protection of the circuit breaker corresponding to its rating.
- auxiliary such as in particular a differential protection device
- this circuit breaker being provided with at least one adjusting screw arranged to perform a initial setting of a thermal release and define the thermal protection of the circuit breaker corresponding to its rating.
- the thermal overload protection is set at the factory taking into account the heating of the cables as well as the own dissipation the device.
- This heat dissipation by Joule effect is due to internal resistances and is evacuated by the external faces in contact with the ambient air as well as by the cables feed.
- an auxiliary such as for example a device of differential protection
- the balance of thermal exchanges of the circuit breaker is modified due in particular to the reduction in exchange surfaces with air ambient, local modification at the outlet and through the auxiliary sections of conductors, of the auxiliary heat dissipation and of the limitation of evacuation by power cables. Because of these balance changes, the circuit breaker trips earlier on overload and should normally be derated in caliber to continue to provide the protection provided.
- the present invention proposes to solve this problem in a simple and automatic during the adaptation of the auxiliary.
- the caliber anti-downgrade device is characterized in that it includes means arranged to perform a new automatic setting of the trigger thermal during the adaptation of the auxiliary, said means comprising at least one actuator integral with the auxiliary and arranged to perform said new setting of the thermal trip device by acting on a receiving member secured to the circuit breaker.
- said actuator consists of a apparent protuberance on a lateral flank of the auxiliary.
- the recipient organ is consisting of a thermal trip bar, one end of which is arranged opposite a window in a side face of the circuit breaker correspondence with said actuator.
- an auxiliary 10 such as for example a device for earth leakage protection, seen from the side, is designed to be fitted to a circuit breaker 11 also shown seen from the side.
- the auxiliary is equipped with an actuator 12 arranged to act automatically on a receiving member 13, this receiving member being designed to automatically reset the thermal release on each pole of the circuit breaker, when adapting the auxiliary to the circuit breaker.
- the actuator 12 is constituted by an apparent protuberance on a lateral face of the auxiliary and the receiving member 13 is constituted by an adjustment bar of the thermal trip device, the end of this bar being placed opposite a window 14 formed in a lateral face of the circuit breaker, in correspondence with said protuberance constituting the actuator 12.
- FIG. 2 illustrates, seen in section, a multipole circuit breaker 11 intended to receive a auxiliary 10 equipped with an actuator 12.
- the electrical coupling is carried out by means of conductors 15 which extend laterally at the base of the auxiliary and which have bent branches allowing connection to the poles of the circuit breaker.
- the thermal trip device 16 has associated bimetallic strips 16a, 16b, 16c and 16d respectively at each pole of the circuit breaker.
- the receiving member 13 is made up by an adjustment bar 17 at two levels defined by the presence of bosses 17a, 17b, 17c and 17d having a cam function to act on the position of the bimetallic strips 16a, 16b, 16c and 16d.
- the bimetallic strips In the initial state corresponding to use of the circuit breaker without auxiliary, the bimetallic strips occupy a first position, called the low position. In the state final, corresponding to the use of the circuit breaker after adaptation of the auxiliary, the bimetallic strips occupy a second position, called the upper position, defined by the bosses 17a, 17b, 17c and 17d.
- This second position takes into account the new distribution of heat exchanges due to the addition of the auxiliary. It is obtained by a displacement of the adjustment bar 17, in the direction of arrow A, generated by the thrust exerted by the actuator 12 which enters a window 14 identical to that defined with reference to Figure 1 and rests on the end of this bar.
- This the bar also comprises a support stop 18 of a return spring 19. During the displacement of the adjustment bar from the first to the second position, the spring is compressed. If the auxiliary is removed, the adjustment bar can return to its first position under the action of the return spring 19. In this case, the bimetallic strips resume their so-called
- the new setting of the bimetallic strips 16a, 16b, 16c and 16d is carried out in function of their distance from the face of the circuit breaker 11 adjacent to the auxiliary 10.
- the auxiliary is provided with an actuator 12 which engages in a window 14 arranged in the lateral side of the circuit breaker, facing the end of the adjustment bar 27.
- FIG. 4 illustrates an embodiment according to which it acts on the base or the foot of the bimetallic strips.
- a bimetallic strip 30 is mounted on a base 31 which has an element 32 in U-shaped, one branch 32a of which has an adjusting screw 33 and the other branch of which 32b is linked to the rectilinear active blade 34 of the bimetallic strip.
- the central part of element 32 U-shaped is mounted on a support 35 pivoting on a fixed axis 36 integral with the circuit breaker.
- a branch 37, integral with this support is, firstly supported on the adjustment bar 38 and, on the other hand pushed against this bar by a spiral spring 39.
- the initial setting of the bimetal setting is carried out by means of the adjusting screw 33 which is engaged in two nuts 40 and 41 arranged on either side of the branch 32a of element U-shaped 32. The end of this screw bears against the other branch 32b of this element. Wedging consists in spreading the two branches apart appropriate. It makes it possible to adjust the spacing x of the end of the active blade 34 by compared to a link 42 for triggering in the event of overheating.
- the action of the bar adjustment 38 consists in acting on the initial spacing x by pivoting the base of the bimetallic strip on axis 36.
- FIG. 5 illustrates another operating mode according to which the bar acts directly on a trigger rod 50 in the event of overheating and no longer on the bimetallic strip.
- the active blade 51 of the bimetallic strip is secured to an angled base 52.
- An adjustment screw 53 makes it possible to adjust the initial spacing x 2 of the end of the active blade relative to the rod 50, by modifying the angle of the elbow formed by the bent base 52, one branch of which is secured to the circuit breaker case and the other branch is free.
- the adjustment bar 54 acts on the position of the link 50. In the absence of an auxiliary, this link occupies a position shown in solid lines, and the spacing between the active blade and the link is x 2 .
- FIG. 6 illustrates an embodiment in which the circuit breaker 11 can be associated with two auxiliaries 10a and 10b which each include an actuator, 12a and 12b respectively.
- the circuit breaker must include two adjustment bars whose effects combine to ensure a new setting bimetallic strips taking into account the new equilibrium conditions of dissipation thermal due to the addition of auxiliaries.
Landscapes
- Breakers (AREA)
- Thermally Actuated Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Description
Claims (10)
- Dispositif anti-déclassement d'un disjoncteur suite à l'adaptation d'un auxiliaire tel que notamment un dispositif de protection différentielle, ce dispositif comprenant le disjoncteur et l'auxiliaire, ce disjoncteur étant pourvu d'au moins une vis de réglage agencée pour effectuer un calage initial d'un déclencheur thermique et définir la protection thermique du disjoncteur (11, 60) correspondant à son calibre,
caractérisé en ce que qu'il comprend des moyens agencés pour effectuer un nouveau calage automatique du déclencheur thermique lors de l'adaptation de l'auxiliaire (10, 67), lesdits moyens comprenant au moins un actionneur (12, 12a, 12b) solidaire de l'auxiliaire et agencé pour effectuer ledit nouveau calage du déclencheur thermique en agissant sur un organe récepteur (13) solidaire du disjoncteur.. - Dispositif selon la revendication 1, caractérisé en ce que ledit actionneur est agencé pour agir sur un bilame pour chaque pôle du disjoncteur (60).
- Dispositif selon la revendication 1, caractérisé en ce que ledit actionneur est agencé pour agir sur une biellette d'un mécanisme de déclenchement associé à un bilame pour chaque pôle du disjoncteur (60).
- Dispositif selon la revendication 1, caractérisé en ce que ledit actionneur (12, 12a, 12b) est constitué par une protubérance apparente sur un flanc latéral de l'auxiliaire.
- Dispositif selon la revendication 1, caractérisé en ce que ledit organe récepteur (13) est constitué par un barreau d'ajustage (17) du déclencheur thermique, dont une extrémité est disposée en regard d'une fenêtre (14) ménagée dans une face latérale du disjoncteur en correspondance avec ledit actionneur.
- Dispositif selon la revendication 5, caractérisé en ce que ledit barreau d'ajustage (17) comporte des bossages (17a, 17b, 17c, 17d; 27a, 27b, 27c, 27d) agencés pour coopérer à la manière de cames sur la position d'un composant du déclencheur thermique correspondant à chaque pôle du disjoncteur.
- Dispositif selon la revendication 6, caractérisé en ce que les bossages (17a, 17b, 17c, 17d; 27a, 27b, 27c, 27d) du barreau d'ajustage (17) sont agencés pour agir respectivement sur des bilames (16a, 16b, 16c, 16d) du déclencheur thermique de chaque pôle du disjoncteur.
- Dispositif selon la revendication 6, caractérisé en ce que les bossages (17a, 17b, 17c, 17d; 27a, 27b, 27c, 27d) du barreau d'ajustage (17) sont agencés pour agir respectivement sur une biellette (42, 50) d'un mécanisme de déclenchement associé à un bilame pour chaque pôle du disjoncteur.
- Dispositif selon la revendication 6, caractérisé en ce que lesdits bossages (17a, 17b, 17c, 17d) ont des hauteurs égales.
- Dispositif selon la revendication 6, caractérisé en ce que lesdits bossages (27a, 27b, 27c, 27d) ont des hauteurs différentes.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9414477 | 1994-11-28 | ||
FR9414477A FR2727567B1 (fr) | 1994-11-28 | 1994-11-28 | Dispositif anti-declassement en calibre d'un disjoncteur suite a l'adaptation d'un auxiliaire |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0715327A1 EP0715327A1 (fr) | 1996-06-05 |
EP0715327B1 true EP0715327B1 (fr) | 2001-06-13 |
Family
ID=9469394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95410119A Expired - Lifetime EP0715327B1 (fr) | 1994-11-28 | 1995-10-16 | Dispositif anti-déclassement en calibre d'un disjoncteur suite à l'adaption d'un auxiliaire |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0715327B1 (fr) |
CN (1) | CN1055175C (fr) |
AT (1) | ATE202238T1 (fr) |
AU (1) | AU691989B2 (fr) |
DE (1) | DE69521273D1 (fr) |
FR (1) | FR2727567B1 (fr) |
RU (1) | RU2107354C1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3831120A (en) * | 1973-11-08 | 1974-08-20 | Gen Electric | Trip unit having improved trip adjustment indicator and circuit breaker incorporating same |
US3950717A (en) * | 1975-02-21 | 1976-04-13 | Westinghouse Electric Corporation | Multi-pole circuit breaker with adjustable thermal trip unit |
US4148004A (en) * | 1977-05-04 | 1979-04-03 | Westinghouse Electric Corp. | Circuit breaker with calibrating means |
DE3812934A1 (de) * | 1988-04-19 | 1989-11-02 | Sursum Elektrizitaetsgesellsch | Mehrphasiger schutzschalter |
FR2641933B1 (fr) * | 1988-12-23 | 1996-06-07 | Hager Electro | Boitier pour appareils electriques modulaires et dispositif d'obturation pour un tel boitier |
-
1994
- 1994-11-28 FR FR9414477A patent/FR2727567B1/fr not_active Expired - Fee Related
-
1995
- 1995-10-16 EP EP95410119A patent/EP0715327B1/fr not_active Expired - Lifetime
- 1995-10-16 AT AT95410119T patent/ATE202238T1/de not_active IP Right Cessation
- 1995-10-16 DE DE69521273T patent/DE69521273D1/de not_active Expired - Lifetime
- 1995-11-24 AU AU39070/95A patent/AU691989B2/en not_active Ceased
- 1995-11-27 RU RU95120246A patent/RU2107354C1/ru active
- 1995-11-28 CN CN95119789A patent/CN1055175C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2727567B1 (fr) | 1997-01-03 |
FR2727567A1 (fr) | 1996-05-31 |
CN1131804A (zh) | 1996-09-25 |
RU2107354C1 (ru) | 1998-03-20 |
AU691989B2 (en) | 1998-05-28 |
CN1055175C (zh) | 2000-08-02 |
ATE202238T1 (de) | 2001-06-15 |
DE69521273D1 (de) | 2001-07-19 |
EP0715327A1 (fr) | 1996-06-05 |
AU3907095A (en) | 1996-06-06 |
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