EP3245697A1 - Method and device for eliminating an electric arc in a multi-phase system - Google Patents
Method and device for eliminating an electric arc in a multi-phase systemInfo
- Publication number
- EP3245697A1 EP3245697A1 EP16700436.5A EP16700436A EP3245697A1 EP 3245697 A1 EP3245697 A1 EP 3245697A1 EP 16700436 A EP16700436 A EP 16700436A EP 3245697 A1 EP3245697 A1 EP 3245697A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switches
- arc
- phases
- detected
- controller
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/065—Means for detecting or reacting to mechanical or electrical defects
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
-
- 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
- H02H3/08—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 excess current
- H02H3/083—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 excess current for three-phase systems
Definitions
- the invention relates to a method for extinguishing an arc in a
- Multi-phase system in which at least one short-circuit switch is closed when an arc is detected.
- the invention relates to a device for extinguishing an arc in a polyphase system by means of a plurality of switches, which are connected between the phases of the polyphase system such that a short circuit path between phases can be switched.
- Such a method and apparatus are known in principle and are used, for example, in electrical installations, in order to protect people and / or the plant itself against the destructive effects of a short-circuited arc or at least to mitigate its effects. For example, animals or even
- dropping tool as well as (damp) dirt reduce the insulation or the spark gap between two conductors at different voltage potential such that such an arc is formed. Due to the sometimes very high resulting currents may cause violent explosions due to the heating up in a short time air.
- This object is achieved by a method of the type mentioned, in which with the closing of the switch, a short circuit is generated only between those phases between which an arc is detected.
- the object of the invention is also achieved with a device of the type mentioned, in which
- the switches are individually controllable and
- the presented device can basically be freely installed on an electrical system, but it is advantageous if it is installed in a control cabinet.
- switches are connected in a triangle. In this way, only a single switch must be closed to extinguish an arc burning between two phases. With two arcs between each two phases only two switches must be closed.
- the device has a plurality of current sensors connected to the control, one of which is assigned to one respective phase is. Similarly, it is advantageous if an arc is detected with the aid of a plurality of current sensors, one of which is assigned to a respective one phase. In this way, an arc can be accurately located, that is, it can be determined between which phases an arc burns. It is also advantageous if the device is one with the controller
- an arc is detected by means of a light sensor, in particular with a single light sensor.
- a light sensor With the aid of a light sensor, it can be determined whether there is an extraordinary bright light in the electrical system (for example in a control cabinet) which can be assigned to an electric arc. In this way, the probability of false triggering can be reduced.
- the device has a plurality of light sensors connected to the control, of which one each is associated with one phase. Similarly, it is beneficial to use an arc with the help of several
- Light sensors is detected, one of which is assigned to a respective one phase. In this way, an arc can also be accurately located, that is, it can be determined between which phases an arc burns.
- the housing may also have all the necessary connections for the control, so for example, connections for current sensors, light sensors and other controlled switches (for example, the device upstream NC).
- Fig. 1 shows an exemplary apparatus for extinguishing an arc in one
- Fig. 1 shows an apparatus 1 for extinguishing an arc X in one
- Multi-phase system 2 with the aid of several individually controllable switch S1 ..S3, which are connected between the phases L1 ..L3 of the polyphase system 2 such that a short-circuit path between phases L1 ..L3 is switchable.
- the switches S1 ..S3 are connected via the connecting rail 3 in the star.
- the star point is free in this example, but it could also be connected to a (not shown) neutral conductor. It would also be conceivable, however, that the switches S1 ..S3 are connected in a triangle.
- the switches S1 ..S3 are formed in the example as a semiconductor switch. Specifically, each switch S1 ..S3 has two anti-parallel arranged thyristors, with which both the positive and the negative half-wave of an alternating current
- switches S1 ..S3 could also be constructed of other semiconductors, for example of IGBTs (Insulated Gate Bipolar Transistor), or else designed as (mechanical) switching contacts.
- IGBTs Insulated Gate Bipolar Transistor
- the device 1 has one with the switches S1 ..S3, the device 1 has one with the switches S1 ..S3, the device 1 has one with the switches S1 ..S3, the device 1 has one with the switches S1 ..S3, the device 1 has one with the switches S1 ..S3, the device 1 has one with the switches S1 ..S3, the device 1 has one with the switches S1 ..S3, the device 1 has one with the
- Switches S1 ..S3 connected control 4 which is adapted to generate a short circuit only between those phases L1 ..L3, between which an arc X is detected.
- Switch S1 ..S3 in particular all switches S1 ..S3, in a common
- Housing a short-circuit switch may be arranged.
- the Control 4 may be arranged in the common housing.
- the components mentioned can also be accommodated in separate housings.
- a plurality of current sensors 11... 13 connected to the controller 4 are provided, of which one each is assigned to one phase L 1 .L 3.
- a light sensor 5 connected to the controller 4 is also provided. In the example shown specifically, only a single light sensor 5 connected to the controller 5 is provided. However, it is also conceivable that the arrangement has several connected to the controller 4
- the current sensors 11 and 12 measure one
- Short-circuit current which is detected by the controller 4.
- the controller 4 controls the two switches S1 and S2 to extinguish the arc X.
- the switch S3 remains open. For two arcs X between each two phases L1 ..L3 or arcs between all three phases L1 ..L2, however, all switches S1 ..S3 would be closed.
- this phenomenon should be taken into account, so that the switch is not destroyed by overvoltage.
- the upstream switches S4..S6 are opened in the event of a fault. This can, as shown in the figure, be taken over by the controller 4, or the switches S4..S6 are opened in case of overcurrent by a self-sufficient controller.
- the switches S4..S6 can in particular as
- Overcurrent protection switch may be formed.
- the downstream switches S7..S9 can also be opened. This is particularly useful if there are memories in the downstream network with large amounts of electrical energy (for example, capacitances, inductances, accumulators), which are high even when the switches S4..S6 are open
- Switches S1 ..S3 an all-pole short circuit switched.
Landscapes
- Power Conversion In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015100448 | 2015-01-13 | ||
PCT/EP2016/050491 WO2016113270A1 (en) | 2015-01-13 | 2016-01-12 | Method and device for eliminating an electric arc in a multi-phase system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3245697A1 true EP3245697A1 (en) | 2017-11-22 |
Family
ID=55129857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16700436.5A Withdrawn EP3245697A1 (en) | 2015-01-13 | 2016-01-12 | Method and device for eliminating an electric arc in a multi-phase system |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3245697A1 (en) |
WO (1) | WO2016113270A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112021007890A5 (en) * | 2021-06-29 | 2024-04-11 | Siemens Aktiengesellschaft | Short circuiter |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4438593B4 (en) * | 1994-10-28 | 2006-07-06 | Moeller Gmbh | Arrangement for extinguishing arcs between conductors in switchgear or busbar trunking |
DE202006020625U1 (en) * | 2006-05-30 | 2009-03-26 | Abb Technology Ag | Short circuit device for extinguishing an arc within a medium and high voltage switchgear |
DE102006030671B4 (en) * | 2006-07-04 | 2008-10-02 | Moeller Gmbh | Breaker short-O combination |
-
2016
- 2016-01-12 WO PCT/EP2016/050491 patent/WO2016113270A1/en active Application Filing
- 2016-01-12 EP EP16700436.5A patent/EP3245697A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2016113270A1 (en) | 2016-07-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
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17P | Request for examination filed |
Effective date: 20170704 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: EATON INTELLIGENT POWER LIMITED |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
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17Q | First examination report despatched |
Effective date: 20200210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20200821 |