WO2014086378A1 - Interface a courant de defaut a la terre - Google Patents
Interface a courant de defaut a la terre Download PDFInfo
- Publication number
- WO2014086378A1 WO2014086378A1 PCT/DZ2013/000006 DZ2013000006W WO2014086378A1 WO 2014086378 A1 WO2014086378 A1 WO 2014086378A1 DZ 2013000006 W DZ2013000006 W DZ 2013000006W WO 2014086378 A1 WO2014086378 A1 WO 2014086378A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fault current
- protection
- earth fault
- sensitivity differential
- interface according
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
- H02H3/335—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control the main function being self testing of the device
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/12—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to undesired approach to, or touching of, live parts by living beings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/44—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the rate of change of electrical quantities
Definitions
- the present invention relates to the field of cut-off devices to ensure the protection of property against fire and that of people against indirect contacts in the event of electrical insulation faults to low voltage ground.
- the invention relates to an earth fault current interface; as a result, it will ensure, in the event of a ground fault, the protection of property against fire and that of persons against indirect contact in accordance with conventional safety curves regardless of the value of the resistance of the earth masses and whatever the medium (dry, wet, submerged) and skin conditions.
- the earthing of the masses will no longer necessarily represent a link in the protective chain, but a means of comfort since the increase in its impedance will result in an increase in the sensitivity of the differential device, the safety of the devices. persons and property remaining insured in this case.
- the invention also makes it possible to protect persons against direct contacts occurring between an active conductor and the ground or any foreign conductor not connected to the masses of equipment normally grounded according to the implementation requirements of the invention. invention.
- the differential function is only a link in the "protective chain".
- the differential device ensures the safety of persons against indirect contact only if the following protection condition is satisfied: RA x W a ⁇ 50 Volts; Wherein: R A is the sum of the resistances of the earth electrode and grounding conductors of the masses and a is the current ensuring the automatic deactivation of differential protection device in a time compatible with conventional safety curves.
- the complementary protection measure requires the division of facilities to reduce the possibility of undesired triggering of high sensitivity differential devices due to excessive leakage currents (and not fault currents) in the PE protective conductor.
- these excessive leakage currents can present a risk of electrification or electrocution for anyone in contact with a mass and the ground or with a mass and a foreign conductor not isolated from the ground.
- the danger must be considered to be greater because, in addition to the risk generated by the leakage currents of their own installations, people can be electrified, or even electrocuted, by leakage currents that do not even come from their power supplies, and this, because of the equipotentiality of the masses of housing of the building.
- the current normative protection measures offer no protection against such a situation, it should be considered that people can be electrified or electrocuted by a current that does not even come from their power supply.
- the horizontal selectivity generally used can be faulted by the phenomenon of "trigger by sympathy". This situation is generally observed when opening a protection of a parallel departure which creates an overvoltage phenomenon. This transient overvoltage can lead to the opening of a healthy feeder with filtering capabilities connected to earth ground via the PE.
- the use of DDR with enhanced immunity is necessary in this case.
- the object of the invention is to improve the protection of persons and property against low-voltage ground insulation faults.
- the invention consists of an electromagnetic interface that can be integrated into the high-sensitivity differential devices, the purpose of which is: 1 / - provide fire protection by cutting off the power supply as soon as a fault current of 300 milliamps or less (according to the normative requirements) returns to the power supply through the protective conductor connected to the land of the masses; in what follows, this current will be designated by the EP .
- the protection is ensured by the addition of a pole in the cut-off and protection device.
- This pole will be used to isolate the masses of the main protective conductor as a result of the tripping of the cut-off and protection device.
- This tripping is caused by any current less than or equal to 10 or (30) milliamps (depending on the protection envisaged) likely to pass through a person in contact with a ground and the ground or any conductive element allowing the current to return to the source of food.
- This protection requires that the accessible conductive elements (other than the masses) of the protected dwelling are isolated from those of the other dwellings.
- This insulation is achieved in fact, in particular, by the progressive use of plastic pipes (polyethylene) in water circuits and the use of dielectric insulating fittings for gas pipes. 5 / - to transform the earthing of the masses into a link in the chain of comfort instead of a link in the protection chain, because the protection of persons against indirect contact is ensured regardless of the ohmic resistance of the earth masses and regardless of the medium (dry, wet, submerged) and skin conditions.
- FIG. 1 shows the connection mode of the breaking system obtained by integrating the earth fault current interface (10) into a high sensitivity differential device.
- ground fault current interface is equally applicable to bipolar differential devices used in single-phase and multi-pole installations used in multi-phase installations.
- FIG. 2 represents the first variant of said interface consisting of a desensitization winding (1 1) whose number of turns is different from those of the primary windings (4) of the phase and (5) of the neutral of the high sensitivity differential device.
- FIG. 3 represents the second variant of said interface consisting of a desensitization winding consisting of two coils (2) and (13) made of conductor wires of different cross-sections whose magnetic polarities are reversed (opposite winding directions) and whose the number of turns of each is equal to that of the primary winding (4) of the phase or to that (5) of the neutral of the high sensitivity differential device. The electromagnetic fields of these two coils are subtracted.
- FIG. 4 represents the third variant of the interface (10) consisting of a desensitization winding (14) identical to the primary winding (4) of the phase and to that (5) of the neutral of the high sensitivity differential device but of which it is differentiated by the shunt of part of its turns.
- FIG. 5 represents the response curve of the breaking system obtained by integrating said interface into a high sensitivity differential device 30 mA.
- the high sensitivity differential device initially consists of power contacts (1) and (2) connecting the primary windings (4) and (5), the magnetic core (3), the primary windings (4) and (5) and their outlets (6) and (7) as well as the secondary winding (8) and trigger relay (9).
- the interface which consists of a desensitization winding (10)
- the high sensitivity differential device is transformed into a protection device whose operating characteristics are shown in FIG. 5.
- l d represents the residual differential current (in milliamps) composed of the algebraic sum of the currents lh (mA) and IPE (mA) where:
- I H (mA) represents the current likely to pass through a person under the fault conditions described in 1 - and 3 below; the protection device allows: 1- to protect people by using the initial properties of the high sensitivity differential device.
- the device thus ensures the protection of persons by cutting the power supply in the presence of any current lh less than or equal to 10 (or 30) milliamps (depending on the protection envisaged) coming from one of the outputs (6) or (7) ) primary windings and returning to the power source other than by the protective conductor (16) or by one of the outputs (6) and (7) of the primary windings.
- This current is, therefore, considered likely to pass through a person.
- the interface allows the protection device to ensure the safety of people and property by cutting the power supply in the presence of any residual current composed such that:
- zone of "operation or not” of the usual differential devices is considered as "zone of non-operation”.
- the zone (19) is that of non-operation of the protective device
- curve (20) represents the affine function
- IPE 300 10 x l h ; (l h varying from 0 to 30 mA);
- zone (21) is that of operation or not of the protective device
- the curve l d represents the rated operating differential current of the protection device.
- the interface consists of a desensitization winding (10).
- Said desensitization winding can be made according to at least three variants shown in Figures 2, 3 and 4.
- the interface consists of a desensitization winding (1).
- This variant makes it possible to desensitize the high sensitivity differential device for any fault current returning to the power source through the protective conductor (16) connected to the earth ground (17).
- - NI is the number of turns of the primary winding of the phase or the neutral of the high sensitivity differential device
- N2 is the number of turns of the desensitization winding.
- the interface consists of a desensitization winding composed of two coils (12) and (13), made of conducting wires of different cross-sections, whose polarities Magnets are reversed (opposite winding directions) and the number of turns of each is equal to that of the primary winding of the phase (4) or that of the neutral (5) of the high sensitivity differential device.
- This variant makes it possible to desensitize the high-sensitivity differential device for any fault current returning to the power source through the protective conductor (6) connected to the grounds ground (17).
- SI is the section of the conductor wire of the desensitization coil whose magnetic polarity is in the same direction as that of the primary winding of the phase or that of the neutral of the high-sensitivity differential device;
- -S2 is the section of the conductor wire of the magnetic polarity desensitization coil opposite to that of the primary winding of the phase or that of the neutral of the high sensitivity differential device;
- the interface consists of a desensitization winding (14) identical to those of the phase and the neutral of the high sensitivity differential device, but of which a part of turns is shunted.
- This variant makes it possible to desensitize the high sensitivity differential device for any fault current returning to the power source through the protective conductor (16) connected to the earth ground (17).
- N2 is the number of turns of the desensitization coil
- z is the coefficient which depends on the amount of shunted turns and the specificities of the shunt.
- the fire protection (IPE ⁇ 300 milliamps), is ensured for:
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380071829.4A CN105027377B (zh) | 2012-12-09 | 2013-11-07 | 接地故障电流接口 |
KR1020157018510A KR20150119843A (ko) | 2012-12-09 | 2013-11-07 | 지락 고장 전류를 갖는 인터페이스 |
AU2013354545A AU2013354545B2 (en) | 2012-12-09 | 2013-11-07 | Interface having earth fault current |
EP13859684.6A EP2932572A4 (fr) | 2012-12-09 | 2013-11-07 | Interface à courant de défaut à la terre |
MA38243A MA38243B1 (fr) | 2012-12-09 | 2013-11-07 | Interface a courant de defaut a la terre |
US14/650,492 US9912147B2 (en) | 2012-12-09 | 2013-11-07 | Interface having earth fault current |
JP2015545669A JP6367218B2 (ja) | 2012-12-09 | 2013-11-07 | 地絡故障電流インタフェース |
CA2894443A CA2894443C (fr) | 2012-12-09 | 2013-11-07 | Interface a courant de defaut a la terre. |
TNP2015000260A TN2015000260A1 (fr) | 2012-12-09 | 2015-06-09 | Interface a courant de defaut a la terre |
ZA2015/04948A ZA201504948B (en) | 2012-12-09 | 2015-07-09 | Earth fault current interface |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DZ120838 | 2012-12-09 | ||
DZ120838 | 2012-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014086378A1 true WO2014086378A1 (fr) | 2014-06-12 |
Family
ID=50882825
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DZ2013/000006 WO2014086378A1 (fr) | 2012-12-09 | 2013-11-07 | Interface a courant de defaut a la terre |
Country Status (11)
Country | Link |
---|---|
US (1) | US9912147B2 (fr) |
EP (1) | EP2932572A4 (fr) |
JP (1) | JP6367218B2 (fr) |
KR (1) | KR20150119843A (fr) |
CN (1) | CN105027377B (fr) |
AU (1) | AU2013354545B2 (fr) |
CA (1) | CA2894443C (fr) |
MA (1) | MA38243B1 (fr) |
TN (1) | TN2015000260A1 (fr) |
WO (1) | WO2014086378A1 (fr) |
ZA (1) | ZA201504948B (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108695820A (zh) * | 2018-07-21 | 2018-10-23 | 朱德锋 | 防逆电接地保护系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4138707A (en) | 1977-07-21 | 1979-02-06 | Gross Thomas A O | Ground fault protective systems with predetection neutralization of reactive currents |
US6650523B1 (en) * | 1999-08-25 | 2003-11-18 | Siemens Aktiengesellschaft | Protective device, in particular a fault current protective device |
US20100308943A1 (en) * | 2008-02-14 | 2010-12-09 | Eaton Gmbh | Residual-current circuit breaker |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3976918A (en) * | 1974-10-04 | 1976-08-24 | I-T-E Imperial Corporation | False triggering protection for ground fault sensor |
JPS5354761A (en) * | 1976-10-29 | 1978-05-18 | Nichicon Capacitor Ltd | Overcurrent detector |
JPS6013244Y2 (ja) * | 1977-09-01 | 1985-04-26 | 三菱電機株式会社 | 電流補償付不足電圧継電器 |
FR2454198A2 (fr) | 1979-04-09 | 1980-11-07 | Osmond Max | Alimentation electrique a securite perfectionnee |
EP0020080A1 (fr) * | 1979-05-29 | 1980-12-10 | Trident Equipment Limited | Dispositifs de protection contre un courant de défaut à la terre |
FR2538179B1 (fr) * | 1982-12-21 | 1985-10-04 | Merlin Gerin | Declencheur differentiel residuel a detection de variation d'etat |
CN87203578U (zh) * | 1987-03-10 | 1988-03-02 | 浙江省桐乡电子控制设备厂 | 电子漏电保护器 |
JPH07193978A (ja) * | 1993-12-28 | 1995-07-28 | Tokyo Gas Co Ltd | 給電遮断システム |
ITMI20011327A1 (it) | 2001-06-22 | 2002-12-22 | Abb Ricerca Spa | Interruttore differenziale per la protezione contro correnti di dispersione verso terra |
FR2862423B1 (fr) * | 2003-11-18 | 2005-12-30 | Schneider Electric Ind Sas | Dispositif et procede de protection differentielle et appareil electrique comportant un tel dispositif |
JP4258407B2 (ja) * | 2004-03-19 | 2009-04-30 | 富士電機機器制御株式会社 | 漏電遮断器 |
CN100555785C (zh) * | 2004-10-21 | 2009-10-28 | 钟汝祥 | 智能漏电断路器 |
JP4984805B2 (ja) * | 2006-10-05 | 2012-07-25 | マックス株式会社 | 接地線接続監視装置及び電気機器 |
-
2013
- 2013-11-07 EP EP13859684.6A patent/EP2932572A4/fr not_active Withdrawn
- 2013-11-07 KR KR1020157018510A patent/KR20150119843A/ko not_active Application Discontinuation
- 2013-11-07 CA CA2894443A patent/CA2894443C/fr not_active Expired - Fee Related
- 2013-11-07 CN CN201380071829.4A patent/CN105027377B/zh not_active Expired - Fee Related
- 2013-11-07 AU AU2013354545A patent/AU2013354545B2/en not_active Ceased
- 2013-11-07 JP JP2015545669A patent/JP6367218B2/ja not_active Expired - Fee Related
- 2013-11-07 MA MA38243A patent/MA38243B1/fr unknown
- 2013-11-07 US US14/650,492 patent/US9912147B2/en not_active Expired - Fee Related
- 2013-11-07 WO PCT/DZ2013/000006 patent/WO2014086378A1/fr active Application Filing
-
2015
- 2015-06-09 TN TNP2015000260A patent/TN2015000260A1/fr unknown
- 2015-07-09 ZA ZA2015/04948A patent/ZA201504948B/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4138707A (en) | 1977-07-21 | 1979-02-06 | Gross Thomas A O | Ground fault protective systems with predetection neutralization of reactive currents |
US6650523B1 (en) * | 1999-08-25 | 2003-11-18 | Siemens Aktiengesellschaft | Protective device, in particular a fault current protective device |
US20100308943A1 (en) * | 2008-02-14 | 2010-12-09 | Eaton Gmbh | Residual-current circuit breaker |
Non-Patent Citations (1)
Title |
---|
See also references of EP2932572A4 |
Also Published As
Publication number | Publication date |
---|---|
US20160006239A1 (en) | 2016-01-07 |
AU2013354545B2 (en) | 2017-10-19 |
AU2013354545A1 (en) | 2015-07-23 |
MA38243B1 (fr) | 2017-02-28 |
US9912147B2 (en) | 2018-03-06 |
EP2932572A4 (fr) | 2016-08-31 |
EP2932572A1 (fr) | 2015-10-21 |
ZA201504948B (en) | 2016-12-21 |
KR20150119843A (ko) | 2015-10-26 |
CA2894443A1 (fr) | 2014-06-12 |
JP2016500461A (ja) | 2016-01-12 |
CN105027377B (zh) | 2018-02-23 |
TN2015000260A1 (fr) | 2016-10-03 |
CA2894443C (fr) | 2021-03-23 |
MA38243A1 (fr) | 2016-07-29 |
JP6367218B2 (ja) | 2018-08-01 |
CN105027377A (zh) | 2015-11-04 |
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