CN2739855Y - Arcless digital protector - Google Patents
Arcless digital protector Download PDFInfo
- Publication number
- CN2739855Y CN2739855Y CN 200420076672 CN200420076672U CN2739855Y CN 2739855 Y CN2739855 Y CN 2739855Y CN 200420076672 CN200420076672 CN 200420076672 CN 200420076672 U CN200420076672 U CN 200420076672U CN 2739855 Y CN2739855 Y CN 2739855Y
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- CN
- China
- Prior art keywords
- switch
- circuit
- branch
- diode
- short circuit
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a non-arc digital protector, which comprises a digital monitoring module (4) and short circuit protective circuits, wherein the short circuit protective circuits are arranged in each branch switching return circuit, and is monitored by the digital monitoring module (4); each short circuit protective circuit is provided with a current-limiting resistor (11), a bidirectional controlled silicon (2) and a leakage controlling switch (3) which are connected with a branch switching main return circuit; the control electrode of the bidirectional controlled silicon is in series connected with a regulating resistor (12) and diodes (13), (14); the regulating resistor (12) is connected with cathodes of the diodes (13), (14) by a normally closed contact of a relay (46); the anode of the diode (13) is in parallel connected with a main return circuit under a main switch (1); anodes of each branch diode (14) are respectively connected with the upper side of each branch switch. The utility model has the advantages that the utility model has simple structure, is capable of limiting short circuit current, does not generate electrical arc when the short circuit switch trips, is capable of setting multi-path working electric current and time of switching on conveniently and in time, carries out control and protection of multi-path, etc.
Description
Technical field
The utility model relates to the low-voltage circuit short-circuit protection, particularly a kind of no arc numerical protection device.
Background technology
In the middle of existing various low-voltage circuit short-circuit protections, owing to be subjected to the restriction of its structure, thereby exist following defective: the one, can not limiting short-circuit current; The 2nd, during the short switch tripping operation, be accompanied by bigger electric arc; The 3rd, the impact that can not frequently bear short circuit current.
Summary of the invention
Problem to be solved in the utility model is: a kind of no arc numerical protection device is provided, and it can be used for short time energising, frequently trips and require the protection of the working equipment under the limiting short-circuit current condition, also can be used as the control and the protection of discontinuity working equipment.
The technical scheme that the utility model adopted is: comprise the digital supervision module and by the short-circuit protection circuit that is arranged on each branch switch loop of its monitoring; Each short-circuit protection circuit; be provided with the current-limiting resistance, bidirectional triode thyristor and the leakage control switch that are serially connected in the branch switch major loop; resistance, diode are regulated in the control utmost point series connection of bidirectional triode thyristor; the negative pole of this diode links to each other with the negative pole of another diode; adjusting resistance links to each other with the negative pole of these two diodes by the normally closed contact of relay; the positive pole of another diode is attempted by the major loop under the master switch, and the positive pole of each branch's diode is connected to the upside of each road branch switch.
The utility model compared with prior art has following major advantage:
One. can limiting short-circuit current;
They are two years old. during the short switch tripping operation, do not produce electric arc;
They are three years old. allow frequently to bear the impact of short circuit current;
They are four years old. and multiplex operation electric current and conduction time can be set easily, and multichannel is implemented control and protection;
They are five years old. have the function of digital communication.
They are six years old. and simple in structure, practical, be beneficial to and produce and promote.
Description of drawings
Accompanying drawing is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing.
Structure of the present utility model is as shown in drawings: comprise digital supervision module 4 and by the short-circuit protection circuit that is arranged on each branch switch loop of its monitoring.Each short-circuit protection circuit; be provided with current-limiting resistance 11, the bidirectional triode thyristor 2 that is serially connected in the branch switch major loop and leak control switch 3; resistance 12 and diode 13,14 are regulated in the control utmost point series connection of bidirectional triode thyristor 2; adjusting resistance 12 links to each other with the negative pole of diode 13,14 by the normally closed contact of relay 46; the positive pole of diode 13 is attempted by the major loop under the master switch 1, and the positive pole of each branch's diode 14 is connected to the upside of each road branch switch.
The utility model also comprises communication module 5, and it links to each other with the input of digital supervision module 4 and branch switch 7, master switch 1.Be provided with power module 6, it links to each other with the input of digital supervision module 4, communication module 5 and branch switch 7, master switch 1.Digital supervision module 4 comprises several relays 46, and for example relay 461,462,463,464,465 and 466, and its normally closed contact is respectively 4611,4621,4631,4641,4651,4661.
With main circuit that master switch 1 links to each other in be provided with electricity leakage sensor 8 and current transducer 9.In each branch switch major loop, be provided with current transducer 10.
The utility model can adopt commercially available components and parts.Wherein digital supervision module 4 includes data acquisition circuit 41, single-chip microcomputer 42, drive circuit 43, display 44 and keyboard circuit 45 and relay 461～466, and this module can be carried out sequential control to the controllable silicon of duplexure and the energising and the outage of switch.
Brief description operation principle of the present utility model once and process.
During normal the operation, power supply is by the connection lead in master switch 1, short circuit current limitation resistance 11, bidirectional triode thyristor 2, leakage control switch 3 and loop thereof, to each duplexure power supply; In limited time, the controllable silicon 2 of this branch, leak control switch 3 and successively turn-off when certain branch arrives its energising running time and is provided with, the cooperation of its course of action and operation time limit is identical with the situation of this branch after short circuit.
Under the state of certain branch's short circuit, limit its maximum short circuit current by current-limiting resistance 11; The current transducer 10 of this branch reaches monitoring module 4 with the analog quantity of short circuit current, when monitoring module 4 calculates and when relatively the effective value of short circuit current is greater than the permission operating current that sets, starting relay 461 immediately, the normally closed contact 4611 of relay disconnects the triggering loop of bidirectional triode thyristor 2 immediately, and controllable silicon is turn-offed short-circuit loop naturally; Then, monitoring module 4 starts the leakage control switch 3 of this fault branch, and this switch time-delay was disconnected under no current state in 0.5 second; After this, the operating state of monitoring module 4 and the relay controlled thereof is recovered.
When branch leaks control switch 3 trippings and short circuit current and does not eliminate, master switch 1 tripping operation in 1 second of will delaying time; 0.2 second before this, each branch's controllable silicon turn-offed in advance, and branch switch also should trip immediately; The short-circuit current value of this master switch reaches monitoring module 4 by current transducer 9, is calculated, compares, is handled by monitoring module 4 again.
The leakage control switch of each branch is provided with simulation earth leakage protective, and its operation time limit was less than 0.1 second; By electricity leakage sensor 8, monitoring module 4 can detect the electric leakage state; When electric leakage reached 0.5 second, 4 of monitoring modules turn-offed each branch's controllable silicon, branch switch, master switch and report to the police.
The fault that each branch and total power switch are reflected is all gathered, handles, stores, is shown by monitoring module 4 and the scene classification is reported to the police, and control carrier communication module 5 realizes the communication warning.
Power module 6 input 220V alternating voltages; Export one road 12V direct voltage, carrier communication power is provided; Export one road 3.3V direct voltage, the control module working power is provided.
Claims (4)
1. no arc numerical protection device is characterized in that comprising digital supervision module (4) and by the short-circuit protection circuit that is arranged on each branch switch loop of its monitoring; Each short-circuit protection circuit; be provided with current-limiting resistance (11), the bidirectional triode thyristor (2) that is serially connected in the branch switch major loop and leak control switch (3); the control utmost point series connection adjusting resistance (12) of bidirectional triode thyristor (2) and diode (13), (14); adjusting resistance (12) links to each other with the negative pole of diode (13), (14) by the normally closed contact of relay (46); the positive pole of diode (13) is attempted by the major loop under the master switch (1), and the positive pole of each branch's diode (14) is connected to the upside of each road branch switch.
2. no arc numerical protection device according to claim 1 is characterized in that being also comprising communication module (5), and it links to each other with the input of digital supervision module (4) and branch switch (7), master switch (1).
3. no arc numerical protection device according to claim 2 is characterized in that the input of digital supervision module (4), communication module (5) and branch switch (7), master switch (1) links to each other with power module (6).
4. according to claim 1 or 2 or 3 described no arc numerical protection devices, it is characterized in that digital supervision module (4) includes data acquisition circuit (41), single-chip microcomputer (42), drive circuit (43), display (44), keyboard circuit (45) and several relays (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420076672 CN2739855Y (en) | 2004-09-23 | 2004-09-23 | Arcless digital protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420076672 CN2739855Y (en) | 2004-09-23 | 2004-09-23 | Arcless digital protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2739855Y true CN2739855Y (en) | 2005-11-09 |
Family
ID=35354915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420076672 Expired - Fee Related CN2739855Y (en) | 2004-09-23 | 2004-09-23 | Arcless digital protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2739855Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582581B (en) * | 2008-08-14 | 2012-05-02 | 韩俊 | Electricity leakage-prevention and overcurrent protection device |
-
2004
- 2004-09-23 CN CN 200420076672 patent/CN2739855Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582581B (en) * | 2008-08-14 | 2012-05-02 | 韩俊 | Electricity leakage-prevention and overcurrent protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |