CN102208771A - Switching device and interlock test method thereof - Google Patents
Switching device and interlock test method thereof Download PDFInfo
- Publication number
- CN102208771A CN102208771A CN2011100410055A CN201110041005A CN102208771A CN 102208771 A CN102208771 A CN 102208771A CN 2011100410055 A CN2011100410055 A CN 2011100410055A CN 201110041005 A CN201110041005 A CN 201110041005A CN 102208771 A CN102208771 A CN 102208771A
- Authority
- CN
- China
- Prior art keywords
- cut
- instruction
- switching device
- switch
- protection relay
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
- H01H3/3047—Power arrangements internal to the switch for operating the driving mechanism using spring motor adapted for operation of a three-position switch, e.g. on-off-earth
-
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a switching device and an interlock test method thereof. The interlock test between a three-position switch with cutting off and circuit break functions and a protective relay can be carried out through the switching device. The switching device comprises a three-position switch with cutting off/ circuit break functions, a protective relay providing cutting off/ circuit break instructions for the switch, a circuit shifting device 6 shifting between cutting-off/ circuit-break functions when respective instruction is received from the protective relay, a bus supplying power to the switch, and cables supplying power from the switch to loads.
Description
Technical field
The present invention relates to possess the linkage test method of switching device and this switching device of switch, above-mentioned switch has concurrently and cuts off and cut-out function.
Background technology
Switching device is the equipment that carries out the connection/cut-out of electric current in power transmission system, and switch is responsible for the connection/cut-out of its main electric current.In switching device, vacuum insulated switch gear and existing SF
6Gas-insulated switchgear device is compared, and is not use the SF of expression global warming coefficient as about 23900 times high numerical value of CO2 fully
6The follow-on switching device of the environment-adaptive type of gas.
Wherein, have concurrently cut off and the three position switch device of cut-out function useful aspect the densification that can realize equipment.As having the three position switch device that cuts off cut-out function concurrently, for example has disclosed switching device in patent documentation 1 herein.A kind of switching device that possesses the cut-out of vacuum double break three positions and circuit breaker (CB and DS) and protection relay is disclosed in patent documentation 1.
At this; the following effect of protection relay performance: when when load-side detects overcurrent, switch being cut off instruction; cut off overcurrent; in possessing the switching device of protection relay; need carry out linkage test; this linkage test can normally link for testing protection relay and cutter termly, and cutter can cut off action according to the instruction from protection relay.
[patent documentation 1] spy opens the 2008-104338 communique
Summary of the invention
But; vacuum double break three positions of record cut off and circuit breaker in patent documentation 1; make a switch have the function of cut-out and cut-out function; when carrying out the linkage test of cut-out of protection relay and three positions and circuit breaker; although can only giving, protection relay cuts off instruction; because be in off-position originally as cut-out of homeposition three positions and circuit breaker; so can't carry out instruction again, the linkage test that three positions cut off and whether circuit breaker normally cuts off action at protection relay.
At this, first purpose of the present invention is to provide a kind of switching device that can have the linkage test of the three position switch that cuts off cut-out function and protection relay concurrently.In addition, second order of the present invention is to provide a kind of about the three position switch that has the cut-out cut-out function concurrently of this switching device and the linkage test method of protection relay.
In order to realize first purpose, switching device of the present invention is characterised in that to possess: three position switch, and it possesses cut-out/cut-out function; Protection relay, it is given described switch and cutting off and clearance order; Switching device shifter, its instruction that can switch from this protection relay is to cut off the situation of instruction and be the situation of clearance order; Bus, it provides electric power to described switch; And cable, it provides electric power from described switch to load-side.
In addition, in order to realize second purpose, in the linkage test method of switching device of the present invention, this switching device possesses: three position switch, and it possesses cut-out/cut-out function; Protection relay, it is given described switch and cuts off or clearance order; Bus, it provides electric power to described switch; Cable, it provides electric power from described switch to load-side; And switching device shifter; its instruction that can switch from described protection relay is to cut off the situation of instruction and be the situation of clearance order; this linkage test method is the linkage test method about the described protection relay and the described three position switch of this switching device; after described three position switch is cut off from on-state; switching described switching device shifter makes the instruction from described protection relay become clearance order; after described switching device shifter switches; according to instruction described three position switch is opened circuit, test the described protection relay in the described switching device and the linkage of described three position switch thus from described protection relay.
By reaching first purpose, can provide a kind of switching device that can have the linkage test of the three position switch that cuts off cut-out function and protection relay concurrently.
In addition, by reaching second purpose, can carry out about the three position switch that has the cut-out cut-out function concurrently of switching device and the linkage test of protection relay.
Description of drawings
Fig. 1 is the integrally-built side cross-sectional view that is used to illustrate the switching device of embodiment 1.
Fig. 2 is the function about the switching device till providing electric power from bus to load, the circuit diagram of simplifying for embodiment is described.
Fig. 3 is the circuit diagram of simplifying for the order of the linkage test that embodiment 1 is described.
Symbol description
1 switch; 2 protection relays; 5 transmitting elements; 6 circuit switching device shifters; 7 connection → cut-out coils; 8 cut-out → trip coils; 9 closing coils; 10 control basal plate; 100 switching devices; 101 buses; 102 cables; 103 operators; 104 vacuum earthed switches; 105,110 movable electrodes; 106,111 fixed electrodes; 107 bonding conductors; 108 bus side conductors; 109 load-side conductors; But 112,122 moving-conductors; 113,123 fixed conductors; 114,124 vacuum tanks; 120 current transformers
Embodiment
Below embodiments of the invention are described.
Use Fig. 1～Fig. 3 that present embodiment is described.The switching device 100 of present embodiment is made of following substantially: possess the vacuum double break three position switch 1 that cuts off cut-out function; This vacuum double break three position switch 1 is provided the bus 101 of electric power; The cable 102 of electric power is provided to load-side from vacuum double break three position switch 1; Vacuum earthed switch 104; Be provided for carrying out the operator 103 of operating physical force of the switch of vacuum double break three position switch 1 and vacuum earthed switch 104; In case of emergency give the protection relay 2 that cuts off instruction to vacuum double break three position switch 1; And control basal plate 10.
Vacuum double break three position switch 1 mainly is made of following: make the inner vacuum tank 114 of vacuum that is; Two pairs of movable electrode 105 and fixed electrodes 106 in opposite directions; But the moving-conductor 112 that is connected with movable electrode 105; The fixed conductor 113 that is connected with fixed electrode 106; But with two moving-conductor bonding conductors 107 connected to one another; The arc shield of the electric arc during mask switch; But and the bellows (bellows) that moving-conductor 112 is moved under the state of the vacuum that keeps vacuum tank 114.
Vacuum earthed switch 104 is made of following: make the inner vacuum tank 124 of vacuum that is; Movable electrode 110 in opposite directions and fixed electrode 111; But the moving-conductor 122 that is connected with movable electrode 110; The fixed conductor 123 that is connected with fixed electrode 111; The arc shield of the electric arc during mask switch; But and the bellows (bellows) that moving-conductor 122 is moved under the state of the vacuum that keeps vacuum tank 114.Can make in the switching device 100 by connection vacuum grounding opening-closing device 104 and become earthing potential.
In addition, by solid insulator to vacuum double break three position switch 1 and vacuum grounding opening-closing device 104 one Cheng Mo.In addition, the current transformer 120 that detects the electric current that load-side flows through is set,, can detects by current transformer 120 when when load-side flows through overcurrent in the load-side of vacuum double break three position switch 1.
Use Fig. 2, Fig. 3 that the circuit structure of giving cut-out/clearance order is described.In switching device 100, possess: the transmitting element 5 card outside, give cut-out/clearance order by normally used button that is arranged on switching device 100; And at protection relays 2 that in emergency circumstances use, that can send the cut-out instruction to vacuum double break three position switch 1 such as load-side generation overcurrent.Transmitting element 5 can send instruction to connection → cut-out coil 7, cut-out → trip coil 8 and closing coil 9, and can connect/cut off/action of opening circuit.Under normal conditions, by carry out the operation of vacuum double break three position switch 1 based on the transmitting element 5 of this button.
In addition; form in the switching device 100 in the present embodiment and can send the circuit of instruction, and in control basal plate 10, also possess the switching device shifter 6 that circuit that the instruction from protection relay 2 is sent to connection → cut-out coil 7 and the circuit that sends cut-out → trip coil 8 to are switched from 2 pairs of cut-out → trip coils of protection relay 8.Promptly under this routine situation; when switching preceding switch 1 is on-state; instruction from protection relay 2 is sent to connection → cut-out coil 7; therefore only connection → cut-out coil 7 reacts; become and cut off instruction; when switch 1 is dissengaged positions after switching, only send to cut-out → trip coil 8, therefore become clearance order.And, above-mentioned protection relay 2 and the same electric signal of transmitting element 5 outputs.
Switching device 100 is by the instruction of connections → cut-out coil 7 acceptance from protection relay 2 or transmitting element 5, and operator 103 moves vacuum double break three position switch 1 is moved to off-position from on-position.That is, connection → cut-out coil 7 comes work as accepting to cut off the cut-out instruction accepting unit of instructing.In addition, accept instruction from protection relay 2 or transmitting element 5 by cut-out → trip coil 8, operator 103 moves vacuum double break three position switch 1 is moved to off position from off-position.That is, cut-out → trip coil 8 is accepted the unit as the clearance order of accepting clearance order and is come work.And 8 pairs of same instructions of connection → cut-out coil 7 and cut-out → trip coil are reacted, and operator 103 begins to cut off or the action of opening circuit thus.At this, cut-out → trip coil 8 only reacts when vacuum double break three position switch 1 is in off position.Thus, do not produce misoperation mistakenly during move instruction although can prevent switch in off-position.
Importance to the interlock of protection relay 2 and vacuum double break three position switch 1 describes.When the 1 normal interlock of protection relay 2 and vacuum double break three position switch, in system, when for example when having an accident, flowing through overcurrent, current transformer 120 detection of excessive current that are provided with in load-side, and will flow through overcurrent and convey to protection relay 2.After receiving described reception and registration, protection relay 2 sends instruction, can cut off vacuum double break three position switch 1 according to the instruction from this protection relay 2, prevents to flow through overcurrent in load-side.On the other hand, take place to prevent to flow through overcurrent when unusual, lack the suitable protection of the equipment that connects in load-side in load-side in the linkage of protection relay 2 and vacuum double break three position switch 1.Therefore need confirm termly whether the linkage of protection relay 2 and vacuum double break three position switch 1 is normal.
At this, the order that the linkage of protection relay 2 and vacuum double break three position switch 1 is tested describes.In linkage before on-test; be in common "on" position; instruction from protection relay 2 is that electric signal is communicated to connection → cut-out coil 7; under this state when flowing through overcurrent; instruction from protection relay 2 is that electric signal is communicated to connection → cut-out coil 7; connection → cut-out coil 7 reacts, and operator 103 moves, and cuts off action thus.In the linkage test, at first make vacuum double break three position switch 1 move to off-position, cut off electric current.The cut-out instruction of this moment is not from protection relay 2 outputs, but according to carrying out from instructing based on the common cut-out of the transmitting element 5 of button.Then, by circuit switching device shifter 6 commutation circuits, so that the cut-out → trip coil 8 that passes to vacuum double break three position switch 1 from the electric signal of protection relay 2.After circuit switches, the instruction from protection relay 2 is delivered to cut-out → trip coil 8, vacuum double break three position switch 1 is moved to off position from off-position.
The content that can confirm by above-mentioned linkage test is described.At first, by give the transmitting element 5 of cut-out/clearance order based on normally used button, make vacuum double break three position switch 1 move to off-position and cut off electric current.Thus, can confirm to connect → cut off coil 7 and can normally accept instruction from transmitting element 5, and can confirm to accept this instruction, operator 103 can normally cut off action.But described test is according to the test of common cut-out instruction, only can't confirm whether sent normal instruction from protection relay 2 by this test.
Therefore in the present embodiment, further carry out the instruction from protection relay 2 being transferred to cut-out → trip coil 8 after circuit switches, vacuum double break three position switch 1 is moved to off position from off-position at circuit switching device shifter 6.By this test, can confirm normal instruction to be sent to cut-outs → trip coil 8, and can confirm to accept described instruction operator 103 action of normally opening circuit afterwards from protection relay 2.
Test by initial cut-out action; can confirm to connect → cut off coil 7 can normally accept from after the instruction of transmitting element 5 and can confirming to accept described instruction; memory 103 can normally cut off action; test according to the action of opening circuit of last action based on protection relay 2; after can confirming that 2 pairs of cut-out → trip coils 8 of protection relay have sent normal instruction and can confirm to accept described instruction, operator 103 action of can normally opening circuit.At this, as mentioned above, protection relay 2 and the same electric signal of transmitting element 5 outputs, and 8 pairs of identical instructions of connection → cut-out coil 7 and cut-out → trip coil are reacted.By with reference to this condition, protection relay 2 can also send normal call instruction to connection → cut-out coil 7, and guarantees that connection → cut-out coil 7 accepts this instruction, and operator 103 normally cuts off action.
By said structure, about possessing the switching device of three position switch, this three position switch has the cut-out cut-out function, can carry out the linkage test of protection relay 2 and three position switch by taking above-mentioned steps.
In addition, be that example is illustrated also in the present embodiment, but be not limited to double break with the double-break switch device.
In addition, about switch, be that example is illustrated also with vacuum insulation or solid insulation, even but for example air insulation or gas-insulated also have the switch after these and vacuum insulation or solid insulation made up, also can be suitable for.
In addition; in the present embodiment; protection relay 2 and the same electric signal of transmitting element 5 outputs have been described; and the situation that 8 pairs of same instructions of connection → cut-out coil 7 and cut-out → trip coil are reacted; but same or identical is not necessary, as long as connection → cut-out coil 7 and cut-out → trip coil 8 can both react any one signal of protection relay 2 and transmitting element 5.In addition, also being not limited to electric signal, for example can be the signal of other kinds such as optical communication.As illustrated in the present embodiment, under same and identical situation, need only connection → cut-out coil 7 and 8 pairs of instructions of cut-out → trip coil and react, therefore, for example there is no need to be provided with the needed structure of a plurality of reactions etc., this point is of value to and reduces cost.
Claims (9)
1. switching device is characterized in that possessing:
Three position switch, it possesses cut-out/cut-out function;
Protection relay, it is given described switch and cutting off and clearance order;
Switching device shifter, its instruction of switching from this protection relay is to cut off the situation of instruction and is the situation of clearance order;
Bus, it provides electric power to described switch; And
Cable, it provides electric power from described switch to load-side.
2. switching device according to claim 1 is characterized in that,
Described switching device also possesses current transformer, is determined at the electric current that the load-side of described switch flows through by this current transformer.
3. switching device according to claim 1 and 2 is characterized in that,
Described switch is by vacuum insulation, and possesses the switch of two pairs of fixed electrodes and movable electrode.
4. according to any described switching device of claim 1～3, it is characterized in that,
This switching device also possesses:
Cut off instruction accepting unit, the cut-out instruction of described switch is given in its acceptance;
Clearance order is accepted the unit, and the clearance order of described switch is given in its acceptance;
Transmitting element, it accepts unit transmission instruction to described cut-out instruction accepting unit and described clearance order;
First circuit, it sends to described cut-out instruction accepting unit from the instruction that described protection relay sends; And
Second circuit, its instruction that sends from described protection relay sends to described clearance order and accepts the unit,
Described protection relay is accepted unit transmission instruction to described cut-out instruction accepting unit and described clearance order; described circuit switching device shifter can send to the instruction that sends from described protection relay described first circuit of described cut-out instruction accepting unit and send to the described second circuit that described clearance order is accepted the unit by switching, and the instruction of switching from described protection relay is to cut off the situation of instruction and be the situation of clearance order.
5. switching device according to claim 4 is characterized in that,
Described clearance order is accepted the unit only when described switch is positioned at off-position, to reacting from the instruction of described protection relay or described transmitting element.
6. according to claim 4 or 5 described switching devices, it is characterized in that,
Described protection relay and the identical instruction of described transmitting element output.
7. according to any described switching device of claim 4～6, it is characterized in that,
Described cut-out instruction accepting unit and described clearance order are accepted the unit same instruction are reacted.
8. the linkage test method of a switching device, this switching device possesses: three position switch, it possesses cut-out/cut-out function; Protection relay, it is given described switch and cuts off or clearance order; Bus, it provides electric power to described switch; Cable, it switches described switch provides electric power to load-side; And switching device shifter; it is to cut off the situation of instruction and is the situation of clearance order the instruction from described protection relay; this linkage test method is the linkage test method about the described protection relay and the described three position switch of this switching device; this linkage test method is characterised in that
After described three position switch is cut off from on-state, switch described switching device shifter and make instruction become clearance order from described protection relay,
After described switching device shifter switches, according to instruction described three position switch is opened circuit from described protection relay, test the described protection relay in the described switching device and the linkage of described three position switch thus.
9. the linkage test method of a switching device, this switching device possesses: three position switch, it possesses cut-out/cut-out function; Protection relay, it accepts unit transmission instruction to cut-out instruction accepting unit described later and clearance order; Transmitting element, it accepts unit transmission instruction to cut-out instruction accepting unit described later and clearance order; Cut off instruction accepting unit, the cut-out instruction of described switch is given in its acceptance; Clearance order is accepted the unit, and the clearance order of described switch is given in its acceptance; The circuit switching device shifter, it switches an instruction that sends from described protection relay and sends to the circuit of described cut-out instruction accepting unit and send to the circuit that described clearance order is accepted the unit; Bus, it provides electric power to described switch; And cable, it provides electric power from described switch to load-side, and this linkage test method is the linkage test method about the described protection relay and the described three position switch of this switching device, and this linkage test method is characterised in that,
Described circuit switching device shifter is under the condition that has formed the circuit that the instruction that sends from described protection relay is sent to described cut-out instruction accepting unit; sending the cut-out instruction by described transmitting element to described three position switch; after making described three position switch move to off-position; make described circuit switching device shifter action; switch so that form the instruction that sends from described protection relay is sent to the circuit that described clearance order is accepted the unit
By described protection relay described three position switch is sent clearance order, make described three position switch move to off position, test the described protection relay in the described switching device and the linkage of described three position switch thus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-055224 | 2010-03-12 | ||
| JP2010055224A JP4982579B2 (en) | 2010-03-12 | 2010-03-12 | Switchgear and switchgear interlocking test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102208771A true CN102208771A (en) | 2011-10-05 |
| CN102208771B CN102208771B (en) | 2015-07-15 |
Family
ID=44697480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110041005.5A Expired - Fee Related CN102208771B (en) | 2010-03-12 | 2011-02-17 | Switching device and interlock test method thereof |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP4982579B2 (en) |
| KR (1) | KR101155533B1 (en) |
| CN (1) | CN102208771B (en) |
| BR (1) | BRPI1100812A2 (en) |
| SG (1) | SG174679A1 (en) |
| TW (1) | TWI472110B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808974B (en) * | 2012-11-05 | 2016-09-07 | 英业达科技有限公司 | switch plate device |
| CN108896907B (en) * | 2018-08-27 | 2024-01-23 | 云南电网有限责任公司电力科学研究院 | Switching-on and switching-off time testing device and method for double-break circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007014087A (en) * | 2005-06-29 | 2007-01-18 | Hitachi Ltd | Vacuum insulation switchgear |
| CN101106258A (en) * | 2006-07-12 | 2008-01-16 | 株式会社东芝 | Gas insulated switchgear |
| CN101150247A (en) * | 2006-09-20 | 2008-03-26 | 株式会社日立制作所 | Vacuum insulated switchgear |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06119861A (en) * | 1992-10-06 | 1994-04-28 | Mitsubishi Electric Corp | Operation circuit |
| JP3234901B2 (en) * | 1993-09-13 | 2001-12-04 | オムロン株式会社 | Protection relay / breaker test system and tester used for same |
| JPH10304520A (en) * | 1997-04-22 | 1998-11-13 | Hitachi Ltd | Unit testing device |
| JP4146125B2 (en) * | 2002-01-10 | 2008-09-03 | 株式会社東芝 | Switch operating device |
| JP4135870B2 (en) * | 2002-04-16 | 2008-08-20 | 株式会社日立製作所 | Vacuum switch |
| JP4190320B2 (en) | 2003-03-17 | 2008-12-03 | 株式会社東芝 | Switchgear |
| TWI263236B (en) * | 2003-05-19 | 2006-10-01 | Hitachi Ltd | Vacuum switchgear |
| KR20050098360A (en) * | 2004-04-06 | 2005-10-12 | 주식회사 효성 | Disconnecting/earthing switch for gas-insulated switchgear |
| JP4423598B2 (en) | 2004-08-17 | 2010-03-03 | 株式会社日立製作所 | Single phase module of vacuum switchgear and vacuum switchgear |
| JP4841875B2 (en) * | 2005-06-29 | 2011-12-21 | 株式会社日立製作所 | Vacuum insulated switchgear |
| KR200420968Y1 (en) | 2006-04-24 | 2006-07-07 | 선도전기주식회사 | Operating Device of the third -type Disconnecting Switch for a Gas Insulated Switchgear |
| JP4268991B2 (en) * | 2006-09-20 | 2009-05-27 | 株式会社日立製作所 | Vacuum insulated switchgear |
| JP2009106006A (en) * | 2007-10-19 | 2009-05-14 | Toshiba Corp | Protection interlocking inspection system |
| JP4686555B2 (en) * | 2008-01-09 | 2011-05-25 | 株式会社日立製作所 | Vacuum switchgear |
-
2010
- 2010-03-12 JP JP2010055224A patent/JP4982579B2/en not_active Expired - Fee Related
-
2011
- 2011-01-06 TW TW100100478A patent/TWI472110B/en not_active IP Right Cessation
- 2011-02-08 KR KR1020110011261A patent/KR101155533B1/en not_active IP Right Cessation
- 2011-02-17 CN CN201110041005.5A patent/CN102208771B/en not_active Expired - Fee Related
- 2011-02-24 SG SG2011013364A patent/SG174679A1/en unknown
- 2011-02-25 BR BRPI1100812-1A patent/BRPI1100812A2/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007014087A (en) * | 2005-06-29 | 2007-01-18 | Hitachi Ltd | Vacuum insulation switchgear |
| CN101106258A (en) * | 2006-07-12 | 2008-01-16 | 株式会社东芝 | Gas insulated switchgear |
| CN101150247A (en) * | 2006-09-20 | 2008-03-26 | 株式会社日立制作所 | Vacuum insulated switchgear |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011193558A (en) | 2011-09-29 |
| TWI472110B (en) | 2015-02-01 |
| SG174679A1 (en) | 2011-10-28 |
| CN102208771B (en) | 2015-07-15 |
| BRPI1100812A2 (en) | 2012-11-20 |
| TW201206001A (en) | 2012-02-01 |
| JP4982579B2 (en) | 2012-07-25 |
| KR20110103318A (en) | 2011-09-20 |
| KR101155533B1 (en) | 2012-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8462486B2 (en) | Gas-insulated medium-voltage switchgear assembly | |
| KR101051113B1 (en) | Vacuum insulated switchgear | |
| CN100585971C (en) | Encapsulated, gas-insulated switching installation | |
| JP5615839B2 (en) | Medium voltage distribution cubicle | |
| US20080217153A1 (en) | Insulating Body For a Medium-Voltage Switchgear Assembly | |
| EP1218995B1 (en) | Gas-insulated switchgear device | |
| EP1054493B1 (en) | Gas-insulated switchgear | |
| KR20030051278A (en) | Circuit breaker and substation using thereof | |
| EP2048682B1 (en) | Modular encapsulated electrical device for power distribution networks | |
| CN102208771B (en) | Switching device and interlock test method thereof | |
| CN100524562C (en) | Switching protective device comprising fuses | |
| CN106972397A (en) | Inflatable ac metal closing switch gear | |
| EP2495833A1 (en) | Solid insulated busbar arrangement, especially for medium voltage switchgear | |
| CN206865005U (en) | Inflatable ac metal closing switch gear | |
| KR100237585B1 (en) | A complex-type gas insulated switchgear | |
| JP7237868B2 (en) | gas insulated switchgear | |
| KR102047606B1 (en) | Removable contact switch of protection and distribution board terminal block | |
| CN218447429U (en) | Novel combined transformer | |
| KR101831850B1 (en) | 25.8KV bypass built-in variable load break switch | |
| JPH10136519A (en) | Transformation facility | |
| JP2000253519A (en) | Gas-insulated switch device | |
| JP2004236398A (en) | Power receiving facility | |
| KR20230010513A (en) | Input expansion type module device for protection switchboard and protection switchboard system having the same | |
| JP2014039350A (en) | Ground fault accident protection system | |
| EP2876755A1 (en) | Electrical distribution unit for subsea applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170307 Address after: Tokyo, Japan, Japan Patentee after: Hitachi Sanki System Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Hitachi Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20180217 |