CN100388139C - Full automatic five protection control system - Google Patents
Full automatic five protection control system Download PDFInfo
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- CN100388139C CN100388139C CNB2004100504480A CN200410050448A CN100388139C CN 100388139 C CN100388139 C CN 100388139C CN B2004100504480 A CNB2004100504480 A CN B2004100504480A CN 200410050448 A CN200410050448 A CN 200410050448A CN 100388139 C CN100388139 C CN 100388139C
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Abstract
The present invention discloses a full automatic multifunction control system which comprises a logical control circuit, and a detecting control device for a rear upper door, a detecting control device for a rear lower door, a barrow detecting control device, a ground wire detector and a high pressure detector which are connected with the logical control circuit. On the premises that the normal functions, the maintenance and the repair of a barrow switch cabinet are not influenced, the rear upper door, the rear lower door, the ground wire, the barrow and the high pressure state of the barrow cabinet can be detected in time. The barrow cabinet is rapidly locked during faulty operations and is automatically unlocked during normal operations. The locking and the unlocking are not limited by artificial factors and are realized completely according to the detected signals of the detecting devices. The present invention has the advantages of stable operation, high accuracy and multiple functions, ensures people and equipment security. Operators for the barrow cabinet do not need to carry any tools. The operation is simple and convenient.
Description
Technical field:
The present invention relates to a kind of supervisory system that prevents the power equipment maloperation, especially a kind of full-automatic five anti-control systems that are applicable to working power handcart cabinet, standby power supply handcart cabinet, transformer frequency response handcart cabinet and the load handcart cabinet of monitoring generating plant, large industrial enterprise.
Background technology:
In order to guarantee the person and property safety, China Ministry of Energy expressly provided once that all switch cubicles that comes into operation must have the security system of the maloperation of preventing, should reach " five is anti-" function, prevented that mistake from dividing, mistake is closed isolating switch that is:; Prevent that on-load from drawing, closing isolating switch; Prevent charged hanging ground-wire; Prevent to be with ground wire to close isolating switch and prevent mistakenly entering charged chamber.Above-mentioned five anti-functions are applied to being embodied as of handcart cabinet: prevent on-load push-and-pull handcart, prevent charged hanging earthing conductor, prevent to be with ground wire pushing hands car and prevent mistakenly entering charged chamber.The set cashier's office in a shop error-proof device of handcart all is a mechanical hook-up basically at present, exists following serious " anti-error " defective, can not satisfy " five is anti-" requirement of Ministry of Energy.
1. handcart cabinet bus-bar room pocket door does not have blocking device, and anyone can both open at any time; Handcart cabinet load side pocket door connects with screw, also can unload arbitrarily, and the hidden danger of mistakenly entering charged chamber is so just arranged.
2. locking mutually between some handcart cabinet load side pocket door and the ground connection cutter, prevent to be strayed into the back effect at charged interval down though can play, but but exist other problems: because the existence of locking, back load side pocket door can't be opened, like this no matter splice grafting ground cutter still be apparatus insulated test must the condition precedent of first electrical verification under, just can only enter in the switch gap manual unlocking insulation barrier, exposing behind the contact could electrical verification, exists the hidden danger that threatens personal safety equally.
3. there is not interlock between two working power handcart cabinets of double-speed motor or dual power supply motor, can't resolve a switch when " work " position, the load side pocket door of two handcart cabinets is all forbidden the problem opened, seriously has the possibility of mistakenly entering charged chamber or charged hanging ground-wire.
4. can't overcome the maloperation that under the low-tension transformer body away from the handcart cabinet hangs with the situation of ground wire, pushes handcart.
5. no interconnective or warning device between standby power supply cabinet, transformer case and the PT cabinet, when arbitrary handcart cabinet during in " work " position, all might make the bus of other handcart cabinets charged be connected ground wire, exist the possibility that mistakenly entering charged chamber and band ground wire push handcart.
6. owing to all do not have any interlocking between any handcart cabinet and other all handcart cabinets, when overhauling the bus hanging earthing conductor, at any time may be with the maloperation of ground wire pushing hands car cabinet.
7. owing to be not arranged on the on-load state under the device of restriction handcart push-and-pull, thus under the state of on-load, also can arbitrarily push away, the car of shaking hands, exist the hidden danger of on-load push-and-pull handcart.
Summary of the invention:
The objective of the invention is can't anti-error comprehensively technical matters in order to solve existing in prior technology, provide a kind of can ensure effectively life safely, prevent device damage, really accomplish five full-automatic five anti-anti-control systems.
Technical solution of the present invention is: a kind of full-automatic five anti-control systems, be provided with logic control circuit, with logic control circuit be connected to the back to the doorstep detection control apparatus, Xiamen, back detection control apparatus, handcart detection control apparatus, thread detector and high-voltage detector, the back to the doorstep detection control apparatus, Xiamen, back detection control apparatus, handcart detection control apparatus, thread detector and high-voltage detector detection signal is inputed to logic control circuit, by logic control circuit control back detection control apparatus, back Xiamen detection control apparatus and ground thread detector to the doorstep.
Also be connected to the Qianmen with described logic control circuit and detect control circuit, the Qianmen is detected control circuit detection signal is inputed to logic control circuit, detects control circuit by logic control circuit control Qianmen.
Described logic control circuit can be also can be the single-chip microcomputer of computer software support by the logical operation executive circuit that electric elements such as relay inclusive NAND door constitute.
Described back to the doorstep detection control apparatus, back Xiamen pick-up unit and handcart detection control apparatus be provided with electric control lock and with the switch testing circuit of electric control lock interlock.
Described electric control lock is electromagnetic lock SL325; Described and the switch testing circuit electric control lock interlock is to be provided with optical sensor IC325, be connected to resistance R 326 with optical sensor IC325, two ends in optical sensor IC325 and resistance R 326 are connected to capacitor C 326, C325, be connected to resistance R 325 and LED 325 with electromagnetic lock SL325, also be connected to unlock switch K325 with electromagnetic lock SL325.
Described handcart detection control apparatus is for being provided with handcart control lock and handcart position detecting circuit.
Described handcart position detecting circuit is the removable pin 2 that is provided with optical sensor 1 and places optical sensor 1, and removable pin 2 places on the fixed mount 3, and the front end of removable pin 2 is fixedly connected with dolly and touches wheel 4, and fixed mount 3 and dolly touch between the wheel 4 spring 5.The handcart position detecting circuit can be the mechanical microswitch that can induce the dolly position, phototriode or paired infrared ray launches and receives pipe etc. too.
Described ground thread detector has optical sensor 7 for to have the support of being propped by spring 56 at the ground wire housing screw at support 6, and this is the best form of thread detector just.Also can near the ground wire housing screw, be provided with and to induce mechanical microswitch that whether ground wire is installed, phototriode or paired infrared ray launches and receives pipe etc.
Described high-voltage detecting circuit can be any can detect bus charged circuit, but preferably be provided with high voltage induction coil B1, B1 is connected to filtering, rectification, voltage stabilizing, driving circuit with the high voltage induction coil.
Also be connected to the circuit of extendable functions such as display circuit and communicating circuit with described single-chip microcomputer, be connected to the anti-misoperation sub-controller, be connected to the anti-misoperation master controller, be convenient to classification and whole control with the anti-misoperation sub-controller with communicating circuit.
The present invention is a kind of full-automatic five anti-control systems, handcart cashier's office in a shop be separately installed with the back to the doorstep detection control apparatus that joins with logic control circuit, Xiamen, back detection control apparatus, handcart detection control apparatus, thread detector and high-voltage detector, under the prerequisite that does not influence wheelbarrow switch cabinet normal function, maintenance and maintenance, can in time detect the handcart cabinet back to the doorstep, states such as Xiamen, back, ground wire, handcart and high pressure, rapid locking when really accomplishing faulty operation; During normal running, automatic unlocking; The signal that unblocks and detect according to each pick-up unit fully is not subjected to the restriction of human factor, and is stable, accurate, can really reach five anti-requirements, guarantees the person and device security.Handcart cabinet operator need not to carry any instrument, and is simple to operation.Particularly adopted microcomputer (single-chip microcomputer) technology, the communication standard interface can be set to link to each other with the microcomputer that is arranged on production management portion, control room, frequency image monitoring system, the intercom system of the staff who makes production management portion, control room by joining with microcomputer, LED (sand table) system understands the operation and the repair of handcart cabinet in time, exactly.
Description of drawings:
Fig. 1 is the theory diagram of the embodiment of the invention 1.
Fig. 2 is the scheme of installation of the embodiment of the invention 1.
Fig. 3 is the circuit diagram of the embodiment of the invention 1 logic control circuit.
Fig. 4 is the embodiment of the invention 1 back theory diagram of detection control apparatus, Xiamen, back detection control apparatus, handcart detection control apparatus and embodiment 2 Qianmen detection control apparatuss to the doorstep.
Fig. 5 is the embodiment of the invention 1 back circuit diagram of detection control apparatus, Xiamen, back pick-up unit, Qianmen detection control apparatus and handcart detection control apparatus to the doorstep.
Fig. 6 is the structural representation of the embodiment of the invention 1 handcart detection control apparatus.
Fig. 7 is the circuit theory diagrams of the embodiment of the invention 1 handcart detection control apparatus.
Fig. 8 is the structural representation of the embodiment of the invention 1 ground thread detector.
Fig. 9 is the circuit theory diagrams of the embodiment of the invention 1 ground thread detector.
Figure 10 is the circuit theory diagrams of the embodiment of the invention 1 high-voltage detector.
Figure 11 is the connection diagram of the embodiment of the invention 3.
Embodiment:
Below in conjunction with description of drawings the specific embodiment of the present invention.
Embodiment 1:
The logic control circuit of the embodiment of the invention 1 is a single-chip microcomputer, its physical circuit is as shown in Figure 3: single-chip microcomputer IC1 selects the P89LPC935 8-bit microcontroller of PHILIPS Co. for use, also can be the single-chip microcomputer of companies such as Atmel, NEC, Hitachi, Motorola, Microchip, Toshiba.Be connected to capacitor C 100～C106 and 485 communication interface integrated circuit (IC) 2 (SP485) with P0.0～P0.7, P2.4～P2.7 port of single-chip microcomputer IC, the other end of capacitor C 100～C106 be the back to the doorstep detection control apparatus, Xiamen, back detection control apparatus, Qianmen detection control apparatus, the detection signal input end INA～ING and the earth terminal GND of thread detector, high-voltage detector.Be connected to resistance R 101, R102, capacitor C 100 with 485 communication interface integrated circuit (IC) 2.Be connected to not circuit IC3A～IC3E with output interface P1.0～P1.7, the P2.0～P2.3 of single-chip microcomputer IC, the output terminal of not circuit IC3A～IC3E joins by resistance R 103～R107 and photoelectrical coupler IC4～IC8, output NAND gate circuit IC9A～IC9E of photoelectrical coupler IC4～IC8 joins, the output terminal of not circuit IC9A～IC9E and relay J 1～J5 join, be connected to resistance R 201, R202 respectively, LED 1, LED2 with the electric contact of relay J 1～J5; Resistance R 203, R204, LED 3, LED4; Resistance R 205, R206, LED 5, LED6; Resistance R 207, R208, LED 7, LED8; Resistance R 209, R210, LED 9, LED10, and for behind the handcart cabinet to the doorstep, Xiamen, back, Qianmen, handcart detection control apparatus provide the control voltage and current, its contact is OUTA～OUTE.Be connected to capacitor C 107～C110 between the input end of power Vcc and single-chip microcomputer IC1, resistance R R108 is connected to capacitor C 111～C116 between power Vcc and the photoelectrical coupler IC4～IC8 input end.Be connected to capacitor C 201～C204 between power Vcc 1 and the ground, be connected to resistance R R210 between power Vcc 1 NAND gate circuit IC9A～IC9E, power Vcc 1 provides working power for relay J 1～J5 simultaneously, is connected to toggle switch SW1 with single-chip microcomputer IC1.
As shown in Figure 4: described back to the doorstep detection control apparatus, back Xiamen pick-up unit and handcart detection control apparatus be provided with electric control lock and with the switch testing circuit of electric control lock interlock, switch testing circuit and single-chip microcomputer join, the output control electric control lock of single-chip microcomputer.
Electric control lock also can be by motor-driven lock, also can be electromagnetic lock; The switch testing circuit can be and the dead bolt microswitch of interlock mutually, or phototriode that can the induction lock tonguing, paired infrared ray launches and receives pipe or the like, in a word, should be able in time induce the open and close state of electric control lock dead bolt.
Back to the doorstep detection control apparatus in the embodiment of the invention 1 is as shown in Figure 5: electric control lock is electromagnetic lock SL325; Described and the switch testing circuit electric control lock interlock is to be provided with optical sensor IC325, be connected to resistance R 326 with optical sensor IC325, two ends in optical sensor IC325 and resistance R 326 are connected to capacitor C 326, C325, be connected to resistance R 325 and LED 325 with electromagnetic lock SL325, also be connected to unlock switch K325 with electromagnetic lock SL325.INB shown in Fig. 5, OUTB and single-chip microcomputer IC1 join.
The handcart detection control apparatus is for being provided with handcart control lock and handcart position detecting circuit, and the handcart control lock is exactly the block that can stop the handcart push-and-pull, can be by motor-driven lock, also can be electromagnetic lock.The structure of the handcart detection control apparatus of present embodiment 1 as shown in Figure 6, its handcart control lock is an electromagnetic lock 10, the handcart position detecting circuit is the removable pin 2 that is provided with optical sensor 1 and places optical sensor 1, removable pin 2 places on the fixed mount 3, the front end of removable pin 2 is fixedly connected with dolly and touches wheel 4, and fixed mount 3 and dolly touch between the wheel 4 spring 5.The handcart position detecting circuit can be the mechanical microswitch that can induce the dolly position, phototriode or paired infrared ray launches and receives pipe etc. too.
The physical circuit of handcart detection control apparatus is as shown in Figure 7: be provided with electromagnetic lock 10 (SL310), be parallel with diode D310 with electromagnetic lock SL310, be connected to resistance R 310, R311 and capacitor C 310, C311 with optical sensor (IC310), its tie point INA, OUTA and single-chip microcomputer IC1 join.
Ground thread detector structure as shown in Figure 8: described ground thread detector has optical sensor 9 for to have the support of being propped by spring 78 at ground wire housing screw 6 at support 8.This is the best form of thread detector just.Also can near the ground wire housing screw, be provided with and to induce mechanical microswitch that whether ground wire is installed, phototriode or paired infrared ray launches and receives pipe etc.Also can near the ground wire housing screw, install simultaneously a plurality of can induce whether install ground wire induction installation 11, i.e. dual fail-safe thread detector.
The ground thread detector of present embodiment 1 is a kind of ground thread detector of dual fail-safe, its circuit theory is as shown in Figure 9: be provided with two optical sensor IC315, IC316, be connected to resistance R 315, R316 with optical sensor IC316, be connected to resistance R 318 with optical sensor IC315, the LED 315 and the resistance R 319 that also be connected to capacitor C 315, C316 simultaneously, are in series, its tie point INE, INF and single-chip microcomputer IC1 join.
High-voltage detecting circuit can be and anyly can detect the charged circuit of bus.The circuit theory of present embodiment 1 high-voltage detector is as shown in figure 10: be provided with high voltage induction coil B1, B1 is connected to the high voltage induction coil
By filtering, rectification, voltage stabilizing, the driving circuit that diode D331, capacitor C 331, C332, resistance R 331, R332, stabilivolt D332, triode Q330 constitute, its contact ING and single-chip microcomputer IC1 join.
Embodiment 2:
Other just are provided with the Qianmen that also joins with logic control circuit and detect control circuit as embodiment 1 on the Qianmen of the handcart cabinet with Qianmen.The theory diagram of Qianmen detection control circuit and circuit diagram are shown in Fig. 4,5, promptly with back detection control apparatus to the doorstep, afterwards the Xiamen pick-up unit is identical.
Embodiment 3:
As shown in figure 11: other and embodiment 1 or embodiment 2, just also be connected to display circuit and be connected to the anti-misoperation sub-controller with 485 communication interfaces with described single-chip microcomputer IC1, be connected to the anti-misoperation master controller with the anti-misoperation sub-controller, be convenient to classification and whole control.Be connected to LED display system, video camera intercom etc. with the anti-misoperation sub-controller.Be connected to camera supervised system, intercom system and LED (sand table) display with the anti-misoperation master controller.
Principle of work:
Logic control circuit A after receiving all working power handcart cabinets, standby power supply handcart cabinet, transformer frequency response handcart cabinet and load handcart cabinet to the doorstep detection control apparatus, Xiamen, back detection control apparatus, Qianmen detection control apparatus, handcart detection control apparatus, high-voltage detector, behind the status signal of thread detector, carrying out logic analysis handles, detection control apparatus B, back Xiamen detection control apparatus C, handcart detection control apparatus E send instruction to the doorstep backward, make its locking or release, the handcart cabinet reaches " five is anti-" requirement.Simultaneously can send the relevant detection control information, be convenient to classification and whole control to anti-misoperation sub-controller, anti-misoperation master controller.
1. the back duty of detection control apparatus to the doorstep
When working power handcart cabinet, standby power supply handcart cabinet, transformer frequency response handcart cabinet have one during in the working position, handcart detection control apparatus E detects this signal, signal is delivered to logic control circuit A, logic control circuit A backward to the doorstep detection control apparatus send instruction, the action of control electromagnetic lock is pinned (locking) to the doorstep with the back; If the back opening that is in to the doorstep of a handcart cabinet is wherein arranged, to detect door with the switch testing circuit of electric control lock interlock is in the signal of opening and is sent to logic control circuit A, logic control circuit A then detects control circuit E to handcart and sends instruction, control its electromagnetic lock work, block handcart and can't be pushed into the working position; The charged interval of calling after can preventing from effectively to be strayed into.
2. the duty of Xiamen detection control apparatus after
When working power handcart cabinet, standby power supply handcart cabinet, transformer frequency response handcart cabinet have one during in the working position, handcart detection control apparatus E detects this signal, when perhaps high-voltage detector F detects high-voltage signal, signal is delivered to logic control circuit A, logic control circuit A Xiamen detection control apparatus backward sends instruction, the action of control electromagnetic lock is pinned (locking) with the Xiamen, back, prevents to be strayed into charged interval, Xiamen, back and charged hanging earthing conductor; Wherein there is the back Xiamen of a handcart cabinet to be in opening, to detect door with the switch testing circuit of electric control lock interlock is in the signal of opening and is sent to logic control circuit A, logic control circuit A then detects control circuit E to handcart and sends instruction, control its electromagnetic lock work, block handcart, make it can't be pushed into the working position, can prevent to be strayed into charged interval, Xiamen, back effectively.
3. the duty of handcart detection control apparatus
A. as previously mentioned, the handcart cabinet back to the doorstep, when the Xiamen, back is in opening, the electromagnetic lock action in the handcart detection control apparatus is blocked handcart and can't be pushed into the working position, can prevent to be strayed into upper and lower charged interval of door, back and charged hanging earthing conductor effectively;
B. as long as the ground thread detector detects signal and delivers to logic control circuit A, logic control circuit A sends instruction to the handcart detection control apparatus, and handcart is blocked in the action of control electromagnetic lock, makes it can't be pushed into the working position, can prevent to be with ground wire pushing hands car;
C. handcart is when the working position, and the handcart position detecting circuit will detect this signal, delivers to logic control circuit A, logic control circuit A sends instruction to the handcart detection control apparatus, and handcart is blocked in the action of control electromagnetic lock, make it can't push away, draw, prevent on-load push-and-pull handcart.
Claims (8)
1. prevent the control system for one kind full-automatic five, it is characterized in that: be provided with logic control circuit, be connected to back detection control apparatus to the doorstep with logic control circuit, back Xiamen detection control apparatus, the handcart detection control apparatus, ground thread detector and high-voltage detector, the back is detection control apparatus to the doorstep, back Xiamen detection control apparatus, the handcart detection control apparatus, ground thread detector and high-voltage detector input to logic control circuit with detection signal, by the detection control apparatus of calling after the logic control circuit control, back Xiamen detection control apparatus and ground thread detector, described logic control circuit is a single-chip microcomputer, described back is detection control apparatus to the doorstep, back Xiamen pick-up unit and handcart detection control apparatus be provided with electric control lock and with the switch testing circuit of electric control lock interlock, switch testing circuit and single-chip microcomputer join, the output control electric control lock of single-chip microcomputer.
2. according to claim 1 full-automatic five anti-control systems, it is characterized in that: also be connected to the Qianmen with logic control circuit and detect control circuit, the Qianmen is detected control circuit detection signal is inputed to logic control circuit, detects control circuit by logic control circuit control Qianmen.
3. according to claim 2 full-automatic five anti-control systems, it is characterized in that: described electric control lock is electromagnetic lock SL325; Described and the switch testing circuit electric control lock interlock is to be provided with optical sensor IC325, be connected to resistance R 326 with optical sensor IC325, two ends in optical sensor IC325 and resistance R 326 are connected to capacitor C 326, C325, be connected to resistance R 325 and LED 325 with electromagnetic lock SL325, also be connected to unlock switch K325 with electromagnetic lock SL325.
4. according to claim 2 full-automatic five anti-control systems, it is characterized in that: described handcart detection control apparatus is for being provided with handcart control lock and handcart position detecting circuit.
5. according to claim 4 full-automatic five anti-control systems, it is characterized in that: described handcart position detecting circuit is the removable pin (2) that is provided with optical sensor (1) and places optical sensor (1), removable pin (2) places on the fixed mount (3), the front end of removable pin (2) is fixedly connected with dolly and touches wheel (4), and fixed mount (3) and dolly touch between the wheel (4) spring (5).
6. according to claim 2 full-automatic five anti-control systems, it is characterized in that: described ground thread detector has optical sensor (9) for to have the support of being propped by spring (7) (8) at ground wire housing screw (6) at support (8).
7. according to claim 2 full-automatic five anti-control systems, it is characterized in that: described high-voltage detecting circuit is for being provided with high voltage induction coil B1, and B1 is connected to filtering, rectification, voltage stabilizing, driving circuit with the high voltage induction coil.
8. according to claim 2 full-automatic five anti-control systems, it is characterized in that: be connected to display circuit and communicating circuit with described single-chip microcomputer, be connected to the anti-misoperation sub-controller with communicating circuit, be connected to the anti-misoperation master controller with the anti-misoperation sub-controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100504480A CN100388139C (en) | 2004-09-14 | 2004-09-14 | Full automatic five protection control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100504480A CN100388139C (en) | 2004-09-14 | 2004-09-14 | Full automatic five protection control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1588248A CN1588248A (en) | 2005-03-02 |
| CN100388139C true CN100388139C (en) | 2008-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100504480A Expired - Fee Related CN100388139C (en) | 2004-09-14 | 2004-09-14 | Full automatic five protection control system |
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| Country | Link |
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| CN (1) | CN100388139C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050903B (en) * | 2013-01-11 | 2015-08-12 | 山西省电力公司大同供电分公司 | 10kv middle dolly power switch cabinet contact baffle locking device |
| CN106020028A (en) * | 2016-06-02 | 2016-10-12 | 国网山东省电力公司经济技术研究院 | Five-prevention blocking acceptance device |
| CN107834416B (en) * | 2017-10-09 | 2023-08-15 | 广东明阳电气股份有限公司 | Switch room chassis car device of electric multiple locking |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163465Y (en) * | 1993-07-13 | 1994-04-27 | 长沙市高压开关厂 | Trolley annular net switch cabinet |
| CN2442436Y (en) * | 2000-09-22 | 2001-08-08 | 广州擎天电器实业有限公司 | Electromalgnetic safety protector for high voltage switch equipment |
| CN2504620Y (en) * | 2001-11-16 | 2002-08-07 | 费万民 | High voltage switch contactor/bus temp detecting system |
| EP1366396B1 (en) * | 2001-02-22 | 2005-04-06 | Rittal GmbH & Co. KG | Switch cupboard or switch cupboard arrangement comprising a monitoring device arranged therein |
-
2004
- 2004-09-14 CN CNB2004100504480A patent/CN100388139C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2163465Y (en) * | 1993-07-13 | 1994-04-27 | 长沙市高压开关厂 | Trolley annular net switch cabinet |
| CN2442436Y (en) * | 2000-09-22 | 2001-08-08 | 广州擎天电器实业有限公司 | Electromalgnetic safety protector for high voltage switch equipment |
| EP1366396B1 (en) * | 2001-02-22 | 2005-04-06 | Rittal GmbH & Co. KG | Switch cupboard or switch cupboard arrangement comprising a monitoring device arranged therein |
| CN2504620Y (en) * | 2001-11-16 | 2002-08-07 | 费万民 | High voltage switch contactor/bus temp detecting system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1588248A (en) | 2005-03-02 |
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Granted publication date: 20080514 Termination date: 20130914 |