EP2996130A1 - Schutzschalter - Google Patents
Schutzschalter Download PDFInfo
- Publication number
- EP2996130A1 EP2996130A1 EP15184819.9A EP15184819A EP2996130A1 EP 2996130 A1 EP2996130 A1 EP 2996130A1 EP 15184819 A EP15184819 A EP 15184819A EP 2996130 A1 EP2996130 A1 EP 2996130A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- switches
- triggers
- conductive parts
- breaker according
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- H01H71/08—Terminals; Connections
- H01H71/082—Connections between juxtaposed circuit breakers
-
- 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
- H01H71/10—Operating or release mechanisms
- H01H71/1054—Means for avoiding unauthorised release
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
-
- 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
-
- 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
- H01H71/08—Terminals; Connections
-
- 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
- H01H71/10—Operating or release mechanisms
- H01H71/1045—Multiple circuits-breaker, e.g. for the purpose of dividing current or potential drop
-
- 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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
-
- 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
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
- H01H2300/024—Avoid unwanted operation
Definitions
- the invention relates to a circuit breaker comprising two polarities each including two poles connected in parallel, each pole comprising a switch and a trigger.
- Some DC circuit breakers have poles in parallel, to increase the maximum intensity of use.
- Such a circuit breaker comprises two polarities each including two poles connected in parallel.
- Each pole has a trigger, which can operate overload and / or short circuit, adapted to detect an intensity greater than half of the total maximum intensity beyond which the circuit breaker is activated.
- Each pole also includes a switch connected in series to the trigger, this switch ensuring the passage of the current by contact between conductive parts.
- the resistance of a pole includes the resistance of all conductive parts and the contact resistance of the switch.
- the resistance of the conductive parts is very little variable, because it depends only on the resistivity of the materials, little dispersed, and the geometry of the parts, whose tolerances are mastered.
- the contact resistance is subject to variations which can be significant, because of the electric arcs which affect the surface of the fixed and mobile contacts as well in endurance as in short-circuit. As a result, the resistance of the two poles in parallel can be substantially different.
- a current of higher intensity will therefore naturally flow in the pole with the lowest resistance, with the risk of causing tripping of the circuit breaker for a total current value too low. Indeed, it is possible that the current flowing in the least resistant pole exceeds half of the maximum intensity, while the total intensity is less than the maximum intensity.
- the circuit breaker can not perform its function satisfactorily and can cause untimely power outages.
- EP-A-0 117 094 and DE-A-2402092 describe circuit breakers in which electrical connections are established between the trip units and the two-pole switches.
- the invention relates to a circuit breaker comprising two polarities each including two poles connected in parallel, each pole having a switch and a trigger.
- This circuit breaker is characterized in that each of the polarities comprises an equalizer formed by a conductor electrically connecting the connection between the switch and the trigger of a first pole and the connection between the switch and the trigger of the second pole.
- the distribution of the current between the poles is practically affected only by the difference in resistance of the triggers.
- these triggers consist of conductive parts whose resistance is known, and the differences in resistance between the triggers are virtually negligible.
- Current imbalances between the poles connected in parallel are therefore low, which minimizes the risk of tripping of the circuit breaker for too low total intensity values.
- the figure 1 is a circuit breaker 1.
- the circuit breaker 1 comprises a positive polarity PP and a negative polarity PN connected to an electrical source 10.
- Each polarity includes two respective poles 3 and 5.
- Each of the poles 3 and 5 comprises a trigger 7 and a switch 9.
- the trigger 7 and the switch 9 are connected in series.
- the polarities PP and PN are connected to a load 11 connected to the trip units 7.
- the poles 3 and 5 are connected in parallel by an electrical connection L1 on the side of the source 10, and by an electrical connection L2 on the load side 11.
- the circuit breaker 1 is shown open.
- the object of the invention is to prevent variations in the contact resistances of the switches 9 from leading to imbalances in the intensity of the current in the triggers 7 of two poles of the same polarity.
- the poles 3 and 5 are connected, between the trigger 7 and the switch 9, by an equalizer 13 electrically connecting the link between the trigger 7 and the switch 9 of the pole 3, and the connection between the trigger 7 and the switch 9 of the pole 5.
- the connection between the switch 9 and the trigger 7 of the pole 3 is represented on the figure 1 by the point P1.
- the connection between the switch 9 and the trigger 7 of the pole 5 is represented on the figure 1 by the point P2.
- the links represented by the points P1 and P2 are, in practice, interfaces of connection between the triggers 7 and the switches 9, formed by conductive parts belonging to the triggers 7 and the switches 9.
- the equalizer 13 makes it possible to equalize the potentials of the points P1 and P2.
- the equalizer is a conductor that connects the points P1 and P2.
- the distribution of the current in the switches 9 has no effect on the distribution of currents in the trip units 7.
- the resistors of the trip units 7 are equivalent to the resistances of the conductive parts constituting the trip units 7, and the resistance of these pieces is known and well mastered.
- the distribution of the intensity of the current in the respective trip units 7 of the poles 3 and 5 is therefore substantially equal, which prevents tripping of the circuit breaker 1 for intensity values lower than the maximum trigger intensity value.
- the resistance of the equalizers 13 must be zero so that the balancing of the intensities in the triggers 7 of the poles 3 and 5 connected in parallel is perfect, but this condition is impossible to achieve.
- the value of the resistance of the equalizer 13 is at the maximum of the same order of magnitude as the resistance of the triggers 7 of the poles 3 and 5 connected in parallel so that the balance of the currents is significantly improved.
- the value of the resistance of the equalizer 13 is less than about three times that of the resistance of the trip units 7. For example, if the resistance of the trip units 7 is 25 micro-Ohms , the resistance of the equalizers 13 must be less than 75 micro-ohms. The higher the resistance of the equalizer 13 will be low compared to the resistance of the trigger 7, the better the balance of currents.
- the value of the resistance of the equalizer 13 must be lower than the value of the resistance of the triggers 7.
- the equalizer 13 may be in the form of a conductive bridge formed by a rigid mechanical part comprising a central portion 135 and two terminals formed by fixing lugs 130 and 131 provided with holes 133.
- the conductive bridge 13 may be fixed by screws not shown.
- the conductive bridge 13 may be manufactured by forging or by hot forming.
- the figure 3 represents a bridge 13 'according to a variant of the invention.
- the bridge 13 ' may comprise a central portion 135 consisting of a conductive braid or a section of cable and fastening and connecting tabs 130 and 131 by folding a metal plate and connected to the central portion 135, by example by welding or crimping.
- the figure 4 represents a bridge 13 "according to another variant of the invention
- the bridge 13" consists entirely of a metal plate cut and folded.
- the figure 2 represents the part of the circuit breaker 1 which comprises the trip units 7.
- the four trip units 7 belonging to each of the poles 3 and 5 of the polarities PP and PN are grouped together in parallel in a trigger block 17.
- the jumpers 13 are mounted on the trigger block 17, that is to say on the conductive parts of the triggers 7 which form the connections between the triggers 7 and the switches 9.
- Each trigger 7 comprises a bracket and connection 170, which is electrically connected to the conductive parts of this trigger 7, and which forms the electrical connection with the switch 9 of the pole 3 or 5 corresponding.
- Each bridge 13 is fixed on two adjacent lugs 170 respectively belonging to the poles 3 and 5. The fastening lugs 170 project outside the trigger block 17, and the central portion 135 of the jumpers 13 is outside the block trigger 17.
- FIG. 5 A preferred embodiment of the invention is shown on the figure 5 .
- an upper cover 172 of the trigger block 17 of the figure 2 has been removed, making the interior of the trigger block 17 visible.
- the jumpers 13 are mounted inversely with respect to the figure 2 , the central portion 135 of the bridges 13 being inside the trigger block 17.
- a second, a third and a fourth embodiment of the invention are respectively represented on the Figures 6, 7 and 8 .
- the elements similar to those of the first embodiment bear the same references and function in the same way. Only the differences with respect to the first embodiment are detailed below.
- the figure 6 represents the part of a circuit breaker 100 according to a third embodiment of the invention, which comprises the switches 9.
- the four switches 9 belonging to each of the poles 3 and 5 are grouped together in parallel in a switch block 19 adapted to receive a trigger block similar to the trigger block 17.
- the switch block 19 comprises a control 192 which switches when the circuit breaker 100 is triggered, and which is manually operable by a person to reset the circuit breaker 100 and turn the power back on.
- the jumpers 13 are mounted on the switch block 19, that is to say on the conductive parts of the switches 9 which form the connections between the switches 9 and the triggers 7.
- Each switch 9 comprises a bracket and connection 190, which is electrically connected to the conductive parts of this switch 9, and which forms the electrical connection with the trigger 7 pole 3 or 5 corresponding.
- Each bridge 13 is fixed on two adjacent tabs 190 respectively belonging to the poles 3 and 5.
- the equalizer 13 is formed by a bridge having lateral branches formed by conductive parts 70 of two adjacent triggers 7.
- the equalizer 13 may be formed of a single metal part, or by the joining of two conductive parts 70 by a central portion 135 reported, for example, by welding.
- the equalizers 13 are fixed and connected simultaneously and directly on the conductive parts of the triggers 7 and switches 9. As shown in longitudinal section of one of the poles 3, the equalizer 13 is directly mounted on a conductive part 72 of the trigger 7, which is in contact with a conductive part 90 of the switch 9, which is shown in the form of a block. Thus, the equalizer 13 is directly mounted on the conductive parts that electrically connect the triggers 7 to the switches 9, without the need for intermediate parts or connection tabs.
- the equalizers 13, the conductive parts 72 and 90 can be fastened together simultaneously, for example by means of a single screw 15 inserted into respective holes of the conductive parts 72 and 90 and the equalizers 13.
- the equalizer 13 can be fixed on the conductive part 90.
- the equalizers 13 can also be made in the form of cables or braids son son.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Breakers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1458539A FR3025934B1 (fr) | 2014-09-11 | 2014-09-11 | Disjoncteur |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2996130A1 true EP2996130A1 (de) | 2016-03-16 |
EP2996130B1 EP2996130B1 (de) | 2017-08-30 |
Family
ID=51932457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15184819.9A Active EP2996130B1 (de) | 2014-09-11 | 2015-09-11 | Schutzschalter |
Country Status (5)
Country | Link |
---|---|
US (1) | US9779903B2 (de) |
EP (1) | EP2996130B1 (de) |
CN (1) | CN105428168B (de) |
ES (1) | ES2647847T3 (de) |
FR (1) | FR3025934B1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101890684B1 (ko) * | 2016-12-30 | 2018-08-22 | 엘에스산전 주식회사 | 직류 배선용 차단기 |
KR20180094413A (ko) | 2017-02-15 | 2018-08-23 | 엘에스산전 주식회사 | 직류 배선용 차단기 |
KR102108146B1 (ko) * | 2017-12-27 | 2020-05-11 | 엘에스일렉트릭(주) | 직류 차단기 |
US11996236B2 (en) | 2021-05-26 | 2024-05-28 | Eaton Intelligent Power Limited | Current balancing apparatus and methods for parallel connected circuit breakers |
US20230129683A1 (en) * | 2021-10-23 | 2023-04-27 | Benjamin G. Stroyer | Circuit breaker trip device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2402092A1 (de) | 1974-01-17 | 1975-07-31 | Licentia Gmbh | Einpoliger leitungsschutzschalter hoeherer nennstromstaerke |
EP0117094A1 (de) | 1983-02-18 | 1984-08-29 | Heinemann Electric Company | Schutzschalter mit parallelgeschalteten Strombahnen |
EP0702387A1 (de) * | 1994-09-16 | 1996-03-20 | Eaton Corporation | Mehrpoliger Leistungsschalter mit verminderter Betriebstemperatur |
US20060038448A1 (en) | 2004-08-18 | 2006-02-23 | Flores Jose G | Paralleled circuit breaker with conductive elements having thermally stable resistance, and associated method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6034586A (en) * | 1998-10-21 | 2000-03-07 | Airpax Corporation, Llc | Parallel contact circuit breaker |
US6563406B2 (en) * | 2001-06-15 | 2003-05-13 | Eaton Corporation | Multi-pole circuit breaker with parallel current |
CN202307723U (zh) * | 2011-09-30 | 2012-07-04 | 上海良信电器股份有限公司 | 断路器用可带电插拔控制器的接插装置 |
-
2014
- 2014-09-11 FR FR1458539A patent/FR3025934B1/fr not_active Expired - Fee Related
-
2015
- 2015-08-07 US US14/820,651 patent/US9779903B2/en active Active
- 2015-08-20 CN CN201510514938.XA patent/CN105428168B/zh active Active
- 2015-09-11 EP EP15184819.9A patent/EP2996130B1/de active Active
- 2015-09-11 ES ES15184819.9T patent/ES2647847T3/es active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2402092A1 (de) | 1974-01-17 | 1975-07-31 | Licentia Gmbh | Einpoliger leitungsschutzschalter hoeherer nennstromstaerke |
EP0117094A1 (de) | 1983-02-18 | 1984-08-29 | Heinemann Electric Company | Schutzschalter mit parallelgeschalteten Strombahnen |
EP0702387A1 (de) * | 1994-09-16 | 1996-03-20 | Eaton Corporation | Mehrpoliger Leistungsschalter mit verminderter Betriebstemperatur |
US20060038448A1 (en) | 2004-08-18 | 2006-02-23 | Flores Jose G | Paralleled circuit breaker with conductive elements having thermally stable resistance, and associated method |
Also Published As
Publication number | Publication date |
---|---|
CN105428168B (zh) | 2020-01-17 |
EP2996130B1 (de) | 2017-08-30 |
CN105428168A (zh) | 2016-03-23 |
ES2647847T3 (es) | 2017-12-26 |
US20160079024A1 (en) | 2016-03-17 |
FR3025934B1 (fr) | 2017-12-01 |
FR3025934A1 (fr) | 2016-03-18 |
US9779903B2 (en) | 2017-10-03 |
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