EP2115759A1 - Schutzeinrichtung und verfahren zu deren betrieb - Google Patents
Schutzeinrichtung und verfahren zu deren betriebInfo
- Publication number
- EP2115759A1 EP2115759A1 EP07721899A EP07721899A EP2115759A1 EP 2115759 A1 EP2115759 A1 EP 2115759A1 EP 07721899 A EP07721899 A EP 07721899A EP 07721899 A EP07721899 A EP 07721899A EP 2115759 A1 EP2115759 A1 EP 2115759A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- switching device
- current
- switching element
- electrical
- 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
- 230000001681 protective effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 19
- 230000001960 triggered effect Effects 0.000 claims abstract description 7
- 230000010354 integration Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
- H01H71/125—Automatic release mechanisms with or without manual release using a solid-state trip unit characterised by sensing elements, e.g. current transformers
-
- 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
Definitions
- the invention relates to a protective device according to the preamble of claim 1 and a method for operating such a protective device.
- a circuit supplying the electrical load (s) must be automatically disconnected. Triggering of the interruption may be e.g. based on overloading associated with heating, e.g. of a heating wire connected to the circuit, e.g. Circuit breaker with bimetallic releases can be used. Electronic solutions for protection against overload are e.g. Overload relays, which include, for example, transducers. These transducers pass on a signal equivalent to the current flow in a current path to be monitored to a processing unit; Based on this signal, a simulation of a heating of the consumer takes place. If the simulated temperature exceeds a predetermined or specifiable value, an interruption of the current flow in the current path is triggered.
- Overload relays which include, for example, transducers. These transducers pass on a signal equivalent to the current flow in a current path to be monitored to a processing unit; Based on this signal, a simulation of a heating of the consumer takes place. If the simulated temperature exceeds a predetermined or specifiable value
- the switching device may additionally comprise at least one additional temperature sensor, which measures and reports a temperature increase, which is accompanied by a slow increase of the current in the event of an overcurrent, in order to be able to detect in the event of a fault whether there is an overcurrent or a short-circuit current.
- An object of the invention is to provide a particularly suitable device for protection against overload.
- a particularly suitable method for operating such a protective device should be specified.
- the object is achieved according to the invention by the features of claim 1.
- the protective device which is provided for combining with a, a main power line comprehensive electrical switching device or for integration into such a switching device and which at least one switching element, which as electrical or mechanical switching element may be designed, as well as provided for the actuation of the switching element, influenced by a current flow through the main power line switching device comprises, is integrated to influence the switching device in the main power line at least one current transformer.
- the main power line can form a primary line of the current transformer.
- an electrical resistance or an electrical conductivity of at least one secondary winding encompassed by the current transformer can be measured.
- the influencing of the switching device can also take place due to a current induced in the secondary winding.
- a weighting may be provided, e.g. Eliminate environmental effects.
- the term electrical switching device is here and below a switching device for enabling an electrical Current flow and / or interruption of the electrical current flow referred to.
- the switching element can be an electrical or mechanical switching element and can be actuated, for example, by means of at least one electrically magnetizable magnetic drive or a mechanical switch lock.
- this object is achieved according to the invention by the features of claim 2.
- the measurement of the resistance of the secondary winding takes place for influencing the switching device.
- the switching device for actuating the switching element is triggered when the measured resistance or conductance reaches a predetermined or predefinable threshold or exceeds or falls below.
- the threshold value is adapted or adaptable to the switching device or a consumer.
- the invention is based on the recognition that the resistance and electrical conductivity of a material change with its temperature, and that therefore can be concluded from such a change to a temperature change or the temperature / the temperature change can be determined.
- the temperature of its secondary winding changes as a function of the current flow through the main power line.
- a temperature change of the secondary winding but also in a general change in temperature of the environment take place.
- the resistance eg in the Determined secondary winding of the transducer eg measured, it can be based on the measured value, or on the basis of this determine temperature or temperature change, an interruption of the current flow.
- the resistance measurement takes place at predefined or predefinable points in time, in particular in accordance with a predetermined or predefinable measuring cycle.
- the resistance measurement can be carried out continuously. As a result, a continuous monitoring of the resistance and thus the temperature is possible.
- the switching element is arranged in a control circuit enclosing the switching device and, in the event of an interruption of the control circuit, by actuating the control circuit
- Switching element causes an interruption of the current flow through the main power line.
- the switching element is triggered by a switching mechanism of the switching device, e.g. a so-called switch lock, assigned and an actuation of the switching element causes a triggering of the switching mechanism and an interruption of the current flow through the main power line.
- a switching mechanism of the switching device e.g. a so-called switch lock
- the advantage of the invention and its embodiments lies in the fact that protection against overload is ensured in a simple and cost-effective manner, namely by means of the resistance measurement in the secondary winding of the current transformer assigned to the protective device.
- a combination of the protection and / or switching device can be done with other devices, e.g. at least one additional second switching device for detecting and protecting against short-circuits.
- FIG. 1 shows, as an example of an electrical switching device 10, with which the invention is concerned, a so-called contactor.
- a protective device 12 is combined.
- the electrical switching device 10 is provided for switching a main current line 14.
- the main current line 14 and a primary circuit formed therewith also extend into the protective device 12.
- a switching device 16 for detecting overcurrent in the main current line 14 is provided in the region of the main current line 14.
- the switching device 16 acts on a switching element 18 in a the protective device 12 and the electrical Switching device 10 comprehensive control circuit 20 is arranged.
- On the part of the electrical switching device 10 is located in the control circuit 20, a magnetic drive 22.
- the primary circuit can be interrupted by interrupting the Steuerstromkrei- ses 20 by a befindaji on the part of the electrical switching device 10 in the primary circuit switching contact 24 due to actuation by the Magnetic drive 22 is opened.
- FIG. 2 shows an embodiment of the protective device 12 according to the invention.
- a current transformer 26 is integrated in the main power line 14.
- the main power line 14 form a primary line of the current transformer 26.
- the switching device 16 is influenced by the current transformer 26, so that, if necessary, an actuation of the switching element 18 and thus opening of the switching contact 24 occurs.
- the electrical resistance or the electrical conductivity of a secondary winding encompassed by the current transformer 26 is measured by the switching device 16.
- the electrical resistance or the electrical conductivity of the secondary winding is dependent on its temperature, which in turn depends on a current flow in the secondary winding and, due to the spatial proximity of the secondary winding and the main current line 14, on the temperature of the main current line 14.
- the switching device 16 of the switching element 18 is triggered.
- the resistance measurement can be carried out continuously or at predetermined or predefinable points in time, in particular in accordance with a predetermined or predefinable measuring cycle.
- the resistance measurement according to the measuring Clock has the advantage that temperature changes in the secondary winding are reduced due to the measurement to a minimum.
- FIG. 3 shows an embodiment of the invention, in which the protective device 12 is integrated into the electrical switching device 10.
- a circuit breaker is shown here. 2
- a switching mechanism 28 e.g. a so-called switch lock, unlatched, which opens the switch contact 24.
- FIG. 3 also shows that a short-circuit release 30, which is likewise provided for releasing the switching mechanism 28, is integrated into the main current line 14.
- Specified is a protective device 12 for combination with a, a main power line 14 comprehensive electrical
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2007/000230 WO2008095454A1 (de) | 2007-02-07 | 2007-02-07 | Schutzeinrichtung und verfahren zu deren betrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2115759A1 true EP2115759A1 (de) | 2009-11-11 |
EP2115759B1 EP2115759B1 (de) | 2013-12-25 |
Family
ID=38537612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07721899.8A Not-in-force EP2115759B1 (de) | 2007-02-07 | 2007-02-07 | Schutzeinrichtung und verfahren zu deren betrieb |
Country Status (7)
Country | Link |
---|---|
US (1) | US8243409B2 (de) |
EP (1) | EP2115759B1 (de) |
KR (1) | KR101315935B1 (de) |
CN (1) | CN101601112B (de) |
DE (1) | DE112007003443A5 (de) |
ES (1) | ES2446091T3 (de) |
WO (1) | WO2008095454A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010038894B4 (de) * | 2010-08-04 | 2014-12-24 | Siemens Aktiengesellschaft | Messsystem, Leistungsschalter und Verfahren |
DE102013225732B4 (de) | 2013-12-12 | 2023-08-17 | Bayerische Motoren Werke Aktiengesellschaft | Hochvolt-Sicherung für Fahrzeuge |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4249068A (en) * | 1978-09-28 | 1981-02-03 | Joyal Products, Inc. | Method and apparatus for controlling heat energy of a bonding transformer |
US6242993B1 (en) * | 1995-03-13 | 2001-06-05 | Square D Company | Apparatus for use in arcing fault detection systems |
US6452767B1 (en) * | 1995-03-13 | 2002-09-17 | Square D Company | Arcing fault detection system for a secondary line of a current transformer |
DE59603470D1 (de) | 1995-08-31 | 1999-12-02 | Siemens Ag | Leitungsschutzschalter |
DE19532197C2 (de) | 1995-08-31 | 2000-05-18 | Siemens Ag | Stromwandler |
JP2001148312A (ja) | 1999-11-22 | 2001-05-29 | Seiko Epson Corp | 温度検出回路および温度検出方法 |
CN2483876Y (zh) * | 2001-06-21 | 2002-03-27 | 乐清市华美利电子有限公司 | 剩余电流动作断路器 |
DE10253018B4 (de) | 2002-11-14 | 2013-02-28 | Abb Ag | Schaltgerät sowie System und Verfahren zur Strommessung in dem Schaltgerät |
DE102004039601B3 (de) | 2004-08-13 | 2006-07-13 | Intedis Gmbh & Co. Kg | Schaltungsanordnung zum Schutz eines Leiterelements gegen Überstrom |
DE102004056436B4 (de) * | 2004-11-19 | 2019-04-04 | Jenoptik Advanced Systems Gmbh | Verfahren und Vorrichtung zur Erkennung von Fehlerstrom-Lichtbögen in elektrischen Stromkreisen |
-
2007
- 2007-02-07 EP EP07721899.8A patent/EP2115759B1/de not_active Not-in-force
- 2007-02-07 WO PCT/DE2007/000230 patent/WO2008095454A1/de active Application Filing
- 2007-02-07 CN CN2007800510727A patent/CN101601112B/zh not_active Expired - Fee Related
- 2007-02-07 KR KR1020097018655A patent/KR101315935B1/ko active IP Right Grant
- 2007-02-07 US US12/449,399 patent/US8243409B2/en active Active
- 2007-02-07 ES ES07721899.8T patent/ES2446091T3/es active Active
- 2007-02-07 DE DE112007003443T patent/DE112007003443A5/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2008095454A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR101315935B1 (ko) | 2013-10-08 |
WO2008095454A1 (de) | 2008-08-14 |
CN101601112B (zh) | 2013-09-04 |
US8243409B2 (en) | 2012-08-14 |
EP2115759B1 (de) | 2013-12-25 |
US20100002350A1 (en) | 2010-01-07 |
DE112007003443A5 (de) | 2010-01-21 |
KR20100014930A (ko) | 2010-02-11 |
ES2446091T3 (es) | 2014-03-06 |
CN101601112A (zh) | 2009-12-09 |
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