EP2815416A1 - Déclencheur à pression - Google Patents
Déclencheur à pressionInfo
- Publication number
- EP2815416A1 EP2815416A1 EP13710466.7A EP13710466A EP2815416A1 EP 2815416 A1 EP2815416 A1 EP 2815416A1 EP 13710466 A EP13710466 A EP 13710466A EP 2815416 A1 EP2815416 A1 EP 2815416A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- trigger element
- chamber
- arm
- threshold
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H2077/025—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with pneumatic means, e.g. by arc pressure
-
- 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
- H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
Definitions
- the present invention relates to the field of electrical protection devices of at least one line, circuit breaker type, and more particularly relates to triggers called "instantaneous” or “reflexes” that increase the speed of tripping of such devices, improving the effectiveness of the product in its main function of protection, and possibly the coordination / selectivity with other circuit breakers present in the same circuit, from the perspective of managing the protection of a site by conventional prioritization of circuit breakers.
- the invention makes it possible to adjust the response time of a circuit breaker, and consequently its operating level, with respect to the tripping time of other circuit breakers in the same circuit.
- Circuit breaker type electrical devices on which an instantaneous trip unit is installed have a line break part and a tripping part for activation of the break in case of overload or short circuit on a line. Tripping means of different types, obeying typologies of possible incidents on a line, are also provided to operate the lock on a case by case basis.
- the electrical apparatus is provided with an instantaneous trigger of the pressure trigger type, and comprises, for each line:
- a contact carrier carrying a movable contact cooperating with a fixed contact for cutting and closing the line, the opening of the contacts generating the creation of cut gas
- an arc-breaking chamber corresponding to the volume surrounding the contact-contact / mobile contact / fixed contact sub-assembly, said cut-off gases being present in this arc-breaking chamber;
- the triggering means consist of a pressure trigger element formed in one piece, and comprising:
- the invention is characterized principally in that said flat surface is placed in the wall delimiting the volume of the breaking chamber.
- the fact that the flat surface is part of the wall allows a significant space saving within the device.
- the trigger "melts" into the wall, and is virtually invisible within the break chamber.
- the breath created following the formation of the arc will directly press on the wall, so fortiori on the flat surface, and move the trigger that will actuate the mechanical lock and that without intermediate part since the trigger is composed in one piece.
- the surface of the trigger element is positioned substantially in the same plane as at least a portion of said wall and is fitted in a window formed in this wall portion to ensure the sealing of the chamber. cut.
- the trigger element is pivotally attached in the apparatus, the pressing force acting on the flat surface causing the trigger element to pivot and the moving of said planar surface towards the outside of the interrupting chamber when the value of the pressure P in the interrupting chamber is greater than or equal to the threshold pressure Ps, return means acting on the trigger element allowing the return of the flat surface in a initial position stable with respect to the interrupting chamber when the pressure P y decreases to be lower than the threshold pressure Ps.
- the trigger element comprises a first arm connected to one end of a setting spring which constitutes both said biasing means and a compression spring opposing a force resistant to pivoting of the trigger element when the pressure threshold is exceeded.
- P s said resistant force being a function of the stiffness of said spring, this force and the pressure force creating antagonistic couples for the pivoting of the trigger element, the first arm / spring assembly constituting the pressure threshold setting means P s beyond which the trigger occurs.
- the trigger element comprises a second arm corresponding to said actuating means, the pivoting of the trigger element moving said second arm against the actuator when the value of the pressure P in the interrupting chamber is greater than or equal to the threshold pressure P s , said return means acting on the trigger element also allowing the return of the second arm in a stable initial position away from said actuator when the pressure P in the interrupting chamber decreases to be lower than the threshold pressure P s .
- the trigger element comprises a pivot shaft clipped into a fixed part belonging to the apparatus.
- the trigger could be pivoted in any other way.
- the flat surface, the first arm and the second trigger arm all deploy from the pivot shaft of the trigger.
- each trigger element may comprise two flat surfaces arranged in two breaking chambers adjacent, the trigger element being positioned between two adjacent lines.
- R, S and T phases are called R, S and T:
- a first pressure trigger element is located between the adjacent R and S phases, with a flat surface in the phase R interrupting chamber, a flat surface in the phase S interrupting chamber, and the actuating means disposed substantially in the middle, between the two phases R and S;
- a second pressure trigger element is located between the adjacent phases S and T, with a planar surface in the phase S interrupting chamber, a flat surface in the phase T interrupting chamber, and the actuating means disposed substantially in the middle, between the two phases S and T.
- FIG. 3 illustrates the trigger element in stable initial position
- FIG. 4 shows the place surface of the trigger element in the breaking chamber
- FIG. 5 is a schematic view of a tetramodular apparatus with three triggers.
- the trigger element (1) consists of a single piece. It comprises a shaft (2) pivoting in its center, which extend three star arms, namely:
- This trigger element (1) is pivotally mounted in the line protection device. More specifically, the shaft (2) of the trigger element (1) is clipped into a support (9) illustrated in Figure 2.
- This support (9) comprises a notch (18) of cylindrical shape adapted to accommodate the shaft (2) and surrounding it sufficiently so that it can not come out once clipped.
- This support (9) belongs to the triggering part of the protection device, which is a tripolar circuit breaker in the example proposed in FIG. 2.
- the apparatus is then provided with two trigger elements (1) each arranged between two adjacent poles.
- This apparatus conventionally comprises a line breaking part and a triggering part for the activation of the cut in the event of a problem on a line, and comprises for each line, as illustrated in FIG. 4:
- an arc-breaking chamber (1 1) corresponding to the volume surrounding the contact-holder sub-assembly (12) / movable contact (13) / fixed contact (14), said cut-off gases being present in this chamber (1); 1) Arc cut.
- Each block (10) of the trigger element (1) enters a window (15) formed in a breaking chamber (1 1) of a pole.
- the flat surface (5) of the block (10) thus forms part of the wall delimiting the volume of the chamber (1 1) of cut, because the window (15) and the block (10) are dimensioned to ensure the sealing of the chamber (1 1) of cut.
- the pressure P in the chamber (1 1) increases, and the gases present exert a pressure force on the walls of the chamber (1 1), therefore on the flat surface (5) of the trigger element (1), thereby causing the pivoting thereof when the pressure force is sufficient, plus precisely when the pressure P in the breaking chamber (1 1) exceeds a threshold pressure P s triggering.
- the trigger element (1) and the setting spring are then dimensioned so that the torque resulting from the pressing force and applying to the element (1) is greater than the resistive torque due to the spring (8).
- the block (10) then moves towards the outside of the chamber (1 1) of cutoff, its thickness being sufficient so that the flat surface (5) remains at the periphery of the chamber (1 1) while ensuring its sealing, that is to say, limit the loss of pressure over time, because the gases will take time to evacuate the chamber (1 1) despite all the other openings in the chamber (1 1).
- This block (10) is also defined so as to resist mechanically in the long term.
- the flat surface (5) of a block (10) is dimensioned to have a sufficiently large surface, on which the blown air will be exerted so as to ensure that it will move and that a trigger will have well place following this pressure rise P.
- This pressure P s can be adjusted by means of the first arm (3) of the trigger element (1) associated with the spring (8). Indeed, when the trigger element (1) pivots following the exceeding of the threshold pressure P s , the first arm (4) compresses the spring (8). Depending on the stiffness of the spring (8), its compression is more or less hard, thereby making the pivoting of the trigger element (1) more or less easy. Therefore, in particular according to the choice of the stiffness of the spring (8), the pressure force exerted on the flat surface (5) will generate a more or less significant torque to rotate the trigger element against the torque created by the spring (8) on the arm (3).
- the threshold pressure P s is the pressure P in the chamber (1 1) from which the pressure force acting on the flat surface (5) is sufficient to pivot the trigger element (1).
- the spring (8) thus corresponds to a calibration spring.
- This spring (8) also fulfills a second function, namely the return function of the flat surface (5) in stable initial position in the chamber (1 1) of cutoff when the pressure P in the chamber (1 1) has decreased and passed under the threshold pressure P s , the resistive torque due to the spring becoming greater than the tripping torque due to the surface (5).
- Figure 3 shows the trigger element (1) within the protective device, with the nose (7) of the second arm (4) facing an actuator (16).
- the trigger element (1) is in stable initial position, that is to say when the pressure P in the chamber is lower than the threshold pressure P s , then the nose (7) of the second arm (4) is remote from the actuator (16), as in Figure 3.
- the trigger element (1) pivots due to a short circuit, for example, resulting in a sudden cut of the line generating cutoff gases, resulting in an overrun of the pressure threshold P s in the chamber (1 1)
- the nose (7) of the second arm (4) impinges on the actuator (16) and then causes the mechanical lock of the electric protection device to tilt. line.
- the opening of the contacts (13, 14) is by electrodynamic repulsion and is extremely fast in case of short circuit.
- the pressure release (1) allows the mechanical lock to be tilted well before the fault is transmitted to the lock by the thermal or magnetic release of the protection device.
- FIG. 5 shows the arrangement of the trigger elements (1) within a four-pole protection device comprising three phases (R, S, T) and a neutral (N).
- Each pole comprises a contact carrier (12) carrying a movable contact (13), the contact carriers (12) being all interconnected by a rotary bar (17).
- Each trigger element (1) is disposed astride two adjacent poles, with a block (10) penetrating the breaking chamber of a first pole, and the other block (10) penetrating the interrupting chamber of an adjacent pole .
- the cutoff gases produced in the chambers (1 1) relating to (N) and (R) generate a force pressing the two blocks (10) of the trigger element (1) to the left of the device, then pivoting it to trigger the mechanical lock.
Landscapes
- Circuit Breakers (AREA)
- Breakers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1251414A FR2987163B1 (fr) | 2012-02-16 | 2012-02-16 | Declencheur a pression. |
| PCT/FR2013/050317 WO2013121159A1 (fr) | 2012-02-16 | 2013-02-15 | Déclencheur à pression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2815416A1 true EP2815416A1 (fr) | 2014-12-24 |
| EP2815416B1 EP2815416B1 (fr) | 2016-04-06 |
Family
ID=47901180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13710466.7A Active EP2815416B1 (fr) | 2012-02-16 | 2013-02-15 | Déclencheur à pression |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2815416B1 (fr) |
| JP (1) | JP6242347B2 (fr) |
| FR (1) | FR2987163B1 (fr) |
| WO (1) | WO2013121159A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3058560B1 (fr) | 2016-11-10 | 2019-08-23 | Hager-Electro Sas | Declencheur a pression pour appareil electrique de protection de ligne |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6204465B1 (en) * | 2000-04-03 | 2001-03-20 | Eaton Corporation | Circuit breaker with arc gas engaging paddles on a trip bar and/or crossbar |
| KR100616084B1 (ko) * | 2004-10-07 | 2006-08-25 | 엘에스산전 주식회사 | 배선용차단기의 압트립 장치 |
| DE102009015222A1 (de) * | 2009-03-31 | 2010-10-07 | Siemens Aktiengesellschaft | Auslöser für eine elektrische Schaltanordnung |
-
2012
- 2012-02-16 FR FR1251414A patent/FR2987163B1/fr active Active
-
2013
- 2013-02-15 WO PCT/FR2013/050317 patent/WO2013121159A1/fr not_active Ceased
- 2013-02-15 JP JP2014557112A patent/JP6242347B2/ja active Active
- 2013-02-15 EP EP13710466.7A patent/EP2815416B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013121159A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015507344A (ja) | 2015-03-05 |
| EP2815416B1 (fr) | 2016-04-06 |
| FR2987163A1 (fr) | 2013-08-23 |
| WO2013121159A1 (fr) | 2013-08-22 |
| JP6242347B2 (ja) | 2017-12-06 |
| FR2987163B1 (fr) | 2017-04-21 |
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