CN201477187U - Protection characteristic tester of DC circuit breaker - Google Patents
Protection characteristic tester of DC circuit breaker Download PDFInfo
- Publication number
- CN201477187U CN201477187U CN2009201712690U CN200920171269U CN201477187U CN 201477187 U CN201477187 U CN 201477187U CN 2009201712690 U CN2009201712690 U CN 2009201712690U CN 200920171269 U CN200920171269 U CN 200920171269U CN 201477187 U CN201477187 U CN 201477187U
- Authority
- CN
- China
- Prior art keywords
- circuit
- control panel
- interface
- power supply
- input
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a protection characteristic tester of a DC circuit breaker. The protection characteristic tester of DC circuit breaker comprises a control panel, a power source circuit, a display device, an input device, a RS232 interface and a U-disc interface. An input signal from the input device respectively flows to the power source circuit, the display device, the RS232 interface and the U-disc interface from the control panel. The output end of the power source circuit is connected with the control panel. The power source circuit is a low-pressure constant-flow source circuit. The current parameters are set through the input device (a rotary encoder). The constant-flow power circuit is controlled by a master control panel for outputting according a preset current and timing is performed. Meanwhile, the testing result is displayed on the display device (liquid crystal screen). The tested data can be copied to a computer through the U disc interface and can be uploaded to the computer through the RS232 interface. As the power source circuit is a low-pressure constant-flow source circuit, the protection characteristic of the DC circuit breaker can be measured more accurately.
Description
Technical field
The utility model belongs to a kind of dc circuit breaker protection feature tester.
Background technology
Power engineering must have reliable work control power supply.The control power supply is divided into two classes: the one, and direct supply, the 2nd, AC power.Because direct supply is independent of outside the ac power power-supply system, be not subjected to the influence of AC system accident, have safe and reliable, characteristics such as operation maintenance is convenient, thereby be widely used, particularly for the higher power equipment of reliability requirement of high voltage and high capacity unit, direct supply becomes unique alternative control power supply.Dc circuit breaker is power system transformer substation, the most frequently used protecting component of generating plant straight-flow system, and its good performance obtains the consistent of people with practicality to be approved, and is widely used.Present DC feedback network adopts tree structure more, and each consumer in arriving at a station from accumulator is generally at least through three grades of distribution.Along with generating plant, transformer station's control load and living load are more and more higher to the requirement of direct supply; the overload protection of its protection electrical equipment, short-circuit protection require also more and more stricter; it can not have arbitrary tripping and malfunction; especially the malfunction of bypassing the immediate leadership will cause the power equipment damage and the system failure even cause accidents such as large-area power-cuts.The situation of malfunction of bypassing the immediate leadership mainly is that protection electrical equipment is selected unreasonable and isolating switch unstable properties etc.Because the protection feature of dc circuit breaker is improper; in the straight-flow system operational process; when short trouble appears in the consumer of the bottom; often cause the overstep tripping of upper level dc circuit breaker; thereby cause the loss of power accident of other feeder line; fault is further enlarged, seriously jeopardize the safe operation of electrical network.For preventing that this overstep tripping accident from taking place; be necessary each the dc circuit breaker protection feature in the straight-flow system is tested; determine the drop-away time of isolating switch under different short-circuit currents; effectively dc circuit breaker protection feature and protection class selection cooperation etc. is analyzed, thereby whether the differential cooperation of checking between straight-flow system the superior and the subordinate isolating switch is reasonable.
But the technical indicator of the dc circuit breaker that uses in the electric system at present all is the data that provided when equipment dispatches from the factory by manufacturer.The site examining and repairing maintainer is difficult to confirm because of not possessing the coherent detection means whether the dc circuit breaker protection feature meets the requirements.And operation facts have proved that As time goes on, the protection feature of equipment also can change, and after particularly putting into operation 3 years, the technical indicator of equipment is offset, and typically consequence is that isolating switch changes because of characteristic, and causes tripping or malfunction.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of measurement dc circuit breaker protection feature tester accurately.
The technical scheme that addresses the above problem is: the tester of this small-sized DC breaker protective property comprises control panel, power circuit, display device, input equipment, RS232 interface, USB flash disk interface; input signal from input equipment flows to power circuit, display device, RS232 interface, USB flash disk interface respectively from control panel; the output terminal of power circuit links to each other with control panel, and power circuit is the low pressure constant-current source circuit.
The data of test can copy host computer to by the USB flash disk interface, also can be uploaded to computing machine by the RS232 interface.Because power circuit is the low pressure constant-current source circuit, so can measure the dc circuit breaker protection feature more exactly.
Description of drawings
Fig. 1 is a hardware configuration synoptic diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of the power circuit among Fig. 1;
Fig. 3 is an isolating switch test wiring diagram.
Fig. 4 is time current curve template figure.
Embodiment
As shown in Figure 1; this small-sized DC breaker protective property tester; comprise control panel, power circuit, display device, input equipment, RS232 interface, USB flash disk interface; input signal from input equipment flows to power circuit, display device, RS232 interface, USB flash disk interface respectively from control panel; the output terminal of power circuit links to each other with control panel, and power circuit is the low pressure constant-current source circuit.By input equipment (rotary encoder) current parameters is set, exports by the electric current of setting by control panel control constant-current power supply circuit, and timing.Simultaneously, the result with test is presented on the display device (liquid crystal display).The data of test can copy host computer to by the USB flash disk interface, also can be uploaded to computing machine by the RS232 interface.Because power circuit is the low pressure constant-current source circuit, so can measure the dc circuit breaker protection feature more exactly.
Further, also be provided with between power circuit and the control panel and cut-off controller, D/A regulator, A/D sampling thief, control panel by cut-off controller, the D/A regulator is connected with power circuit, the output terminal of power circuit is connected with the input end of control panel by the A/D sampling thief.
Wherein: power circuit becomes direct current with alternating current, and for test provides controllable big electric current, this power supply can provide 1～500A direct current, and power supply opening voltage is+12VDC; Cut-off controller and be used to control the output of power supply, can open or power cutoff; The D/A regulator is used to regulate the size of electric power outputting current; The A/D sampling thief is used to detect the size of direct supply output current, is convenient to the closed loop adjustment of electric current; Control panel is the core of whole device, the Single Chip Microcomputer (SCM) system that employing high-performance CPU and FPGA form (for example, the single-chip microcomputer model is STC89C516RD+, EPM7128SQC100 etc.), cut-offfing of control power supply, the output current size adjustment, and the size of sampling output current, finish human-computer interaction functions such as demonstration, input simultaneously, also can carry out communication with host computer; Adopt 5.7 cun wrongly written or mispronounced character liquid crystal displays of the blue end as display device, rotary encoder is as input equipment, and it is very convenient that this device is manipulated, and human-computer interaction function is very perfect; The RS232 interface is used for upper machine communication, realizes the dual operation function; The USB flash disk interface is used for copying data to the USB flash disk interface, makes things convenient for the preservation of data.
Fig. 2 is the circuit theory diagrams of the constant-current power supply circuit among Fig. 1.Described constant-current power supply circuit comprises input filter circuit; rectification circuit; inverter circuit; output rectifier and filter; accessory power supply; control circuit; the protection actuating circuit; testing circuit; electric main passes through input filter circuit successively; rectification circuit; inverter circuit; output rectifier and filter and export required direct current; the output termination accessory power supply of input filter circuit; the input end of the equal connection control circuit of output terminal of the output terminal of accessory power supply and output rectifier and filter; the input end of the output termination inverter circuit of control circuit, the output terminal of accessory power supply and output rectifier and filter all connect the input end of protection actuating circuit by testing circuit.Control circuit comes control inverter output by detecting output DC stream, thereby reaches the purpose of any constant current DC current output of control.Holding circuit is used for overheat protector, prevents that power supply apparatus Yin Wendu is too high and damages.
Fig. 3 is the wiring diagram of this tester test small-sized DC breaker protective property.During with this tester test small-sized DC isolating switch, only need big electric current output wiring terminal and tested isolating switch to be coupled together with special-purpose high-current test line, this tester is judged the circuit breaker tripping time by the break-make of electric current, thereby measures the time-current characteristic of tested isolating switch.Also the auxiliary contact of isolating switch can be linked on the switch value input interface of tester, tester is judged the drop-away time of isolating switch by calculating current switching and auxiliary tap information.But this tester unit work also can connect computing machine by the RS232 interface, by computer-controlled operation.
Fig. 4 is time current curve template figure.According to GB GB10963-1999 " family expenses and similar site overcurrent protection isolating switch " time-electric current acting characteristic form, designed special-purpose isolating switch and cut-off the family curve template.According to isolating switch B, C, D different types, designed three kinds of typical curve templates, template is logarithmic coordinate systems, and horizontal ordinate is a current axis, and ordinate is a time shaft.This template is made up of two envelopes, if test result drops on left side extra curvature, then isolating switch is too short actuation time, if test point just in time drops in the middle of two curves, then test result is qualified, if test point drops on the right extra curvature, then isolating switch is long actuation time.Each test figure directly is presented on this template curve, be convenient to directly test result and GB be required comparison, whether test result is qualified comes into plain view, and directly causes that because of counting curve error is big by the test point trace less with regard to having avoided like this, causes inaccurate to test result.This tester software according to GB GB10963-1999 " family expenses and similar site overcurrent protection isolating switch " time-the electric current acting characteristic designed special-purpose isolating switch and cut-off the family curve template; each test figure directly is presented on this template curve; be convenient to directly test result and GB be required comparison, whether test result is qualified very clear.
The beneficial effects of the utility model: this instrument can realize that different capabilities small-sized DC breaker protective property detects and test, and 0A～500A can be provided constant big electric current, can export bigger electric current by expansion.Can accurately measure the circuit breaker tripping time under the different short-circuit currents, thereby whether the checking breaker protective property meets the requirements.It is main frame that this instrument adopts up-to-date microprocessor, is equipped with equipment such as LCD, rotary encoder.Long-term actual motion by the scene shows: this device has advantages such as perfect in shape and function, strong interference immunity, reliability height, transparency be good, simple in structure, easy to carry.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection domain of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. dc circuit breaker protection feature tester; it is characterized in that: comprise control panel, power circuit, display device, input equipment, RS232 interface, USB flash disk interface; input signal from input equipment flows to power circuit, display device, RS232 interface, USB flash disk interface respectively from control panel; the output terminal of power circuit links to each other with control panel, and power circuit is the low pressure constant-current source circuit.
2. dc circuit breaker protection feature tester according to claim 1; it is characterized in that: described constant-current power supply circuit comprises input filter circuit; rectification circuit; inverter circuit; output rectifier and filter; accessory power supply; control circuit; the protection actuating circuit; testing circuit; electric main passes through input filter circuit successively; rectification circuit; inverter circuit; output rectifier and filter and export required direct current; the output termination accessory power supply of input filter circuit; the input end of the equal connection control circuit of output terminal of the output terminal of accessory power supply and output rectifier and filter; the input end of the output termination inverter circuit of control circuit, the output terminal of accessory power supply and output rectifier and filter all connect the input end of protection actuating circuit by testing circuit.
3. dc circuit breaker protection feature tester according to claim 1; it is characterized in that: also be provided with between constant-current power supply circuit and the control panel and cut-off controller, D/A regulator, A/D sampling thief; the output terminal of control panel by cut-off controller, the D/A regulator is connected with the input end of power circuit, the output terminal of power circuit is connected with the input end of control panel by the A/D sampling thief.
4. dc circuit breaker protection feature tester according to claim 1 is characterized in that: described control panel adopts singlechip chip, and model is STC89C516RD+.
5. dc circuit breaker protection feature tester according to claim 1 is characterized in that: described control panel adopts singlechip chip, and model is STC89C58RD+.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201712690U CN201477187U (en) | 2009-08-11 | 2009-08-11 | Protection characteristic tester of DC circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201712690U CN201477187U (en) | 2009-08-11 | 2009-08-11 | Protection characteristic tester of DC circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201477187U true CN201477187U (en) | 2010-05-19 |
Family
ID=42413439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201712690U Expired - Fee Related CN201477187U (en) | 2009-08-11 | 2009-08-11 | Protection characteristic tester of DC circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201477187U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419418A (en) * | 2010-06-02 | 2012-04-18 | 伊顿公司 | Metering apparatus |
| CN102707180A (en) * | 2012-06-28 | 2012-10-03 | 南京南车浦镇城轨车辆有限责任公司 | Ground testing device for electrical element of rail vehicle and testing method of electric element |
| CN102944833A (en) * | 2012-10-10 | 2013-02-27 | 陕西富集电力科技股份有限公司 | Device for testing protective feature of direct current circuit breaker |
| CN104502840A (en) * | 2015-01-04 | 2015-04-08 | 北京慧智神光科技有限公司 | Breaker health diagnosis instrument |
| CN104635153A (en) * | 2015-02-07 | 2015-05-20 | 福州大学 | Low-voltage circuit breaker feature test analysis platform |
| CN105158705A (en) * | 2015-09-01 | 2015-12-16 | 国家电网公司 | Loop difference testing apparatus of transformer substation direct-current power supply system |
| CN104251976B (en) * | 2014-09-24 | 2017-06-06 | 河北工业大学 | A kind of operation method of the protection feature test device of miniature circuit breaker |
| CN112485663A (en) * | 2020-11-26 | 2021-03-12 | 国营芜湖机械厂 | Online detection device and detection method for aircraft circuit breaker |
-
2009
- 2009-08-11 CN CN2009201712690U patent/CN201477187U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419418A (en) * | 2010-06-02 | 2012-04-18 | 伊顿公司 | Metering apparatus |
| CN102707180A (en) * | 2012-06-28 | 2012-10-03 | 南京南车浦镇城轨车辆有限责任公司 | Ground testing device for electrical element of rail vehicle and testing method of electric element |
| CN102944833A (en) * | 2012-10-10 | 2013-02-27 | 陕西富集电力科技股份有限公司 | Device for testing protective feature of direct current circuit breaker |
| CN104251976B (en) * | 2014-09-24 | 2017-06-06 | 河北工业大学 | A kind of operation method of the protection feature test device of miniature circuit breaker |
| CN104502840A (en) * | 2015-01-04 | 2015-04-08 | 北京慧智神光科技有限公司 | Breaker health diagnosis instrument |
| CN104635153A (en) * | 2015-02-07 | 2015-05-20 | 福州大学 | Low-voltage circuit breaker feature test analysis platform |
| CN104635153B (en) * | 2015-02-07 | 2017-06-06 | 福州大学 | Low-voltage circuit breaker characteristic test analysis platform |
| CN105158705A (en) * | 2015-09-01 | 2015-12-16 | 国家电网公司 | Loop difference testing apparatus of transformer substation direct-current power supply system |
| CN112485663A (en) * | 2020-11-26 | 2021-03-12 | 国营芜湖机械厂 | Online detection device and detection method for aircraft circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201477187U (en) | Protection characteristic tester of DC circuit breaker | |
| CN102780206B (en) | Electric leakage detection protecting circuit | |
| CN203119606U (en) | Intelligent dual-power supply automatic change-over switch controller | |
| CN102565696B (en) | Quick measuring device of protective pressing plate and measuring method thereof | |
| CN216013591U (en) | Multifunctional handcart switch control loop tester | |
| CN104991482A (en) | Dual transformation ratio metering intelligent controlling device and control mode thereof | |
| CN104065034A (en) | Low-voltage failure detector | |
| CN105529698B (en) | A kind of Intelligent electric gas holder of band self-checking function | |
| CN202453445U (en) | Testing device for stage difference coordination of transformer substation direct-current system | |
| CN109581208A (en) | High-voltage circuitbreaker auxiliary contact and the intelligent detection device of circuit detection | |
| CN205898968U (en) | Electronic relay coil overload detection test bench | |
| CN202177679U (en) | One-point grounding detection device for secondary coil neutral wire of voltage transformer | |
| CN205263212U (en) | Select testing arrangement that closes a floodgate mutually | |
| CN202159123U (en) | Portable detection instrument of characteristics of direct-current circuit breaker | |
| CN208795801U (en) | A kind of automatic no-load voltage ratio tester | |
| CN203337754U (en) | Resonance eliminator detection apparatus | |
| CN203630312U (en) | Direct current motor armature fault detection device | |
| CN203951163U (en) | Low voltage failure detector | |
| CN204595529U (en) | Two no-load voltage ratio metering intelligent controlling device | |
| CN209432967U (en) | A kind of 10kV breaker auxiliary node automatic detection device | |
| CN210776298U (en) | Pressure degumming control system | |
| CN203849399U (en) | Single-phase carrier wave intelligent electric energy meter mis-power failure fault analyzer | |
| CN202929173U (en) | Device testing protective features of dc breaker | |
| CN203387298U (en) | Digital programmable protective device | |
| CN104914848A (en) | Electric locomotive brake logic control device test equipment and test method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20170811 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |