CN202256613U - Device for testing mechanical properties of special circuit breakers - Google Patents
Device for testing mechanical properties of special circuit breakers Download PDFInfo
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- CN202256613U CN202256613U CN2011202778334U CN201120277833U CN202256613U CN 202256613 U CN202256613 U CN 202256613U CN 2011202778334 U CN2011202778334 U CN 2011202778334U CN 201120277833 U CN201120277833 U CN 201120277833U CN 202256613 U CN202256613 U CN 202256613U
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- circuit
- current source
- fracture
- isolating switch
- current
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Abstract
The utility model discloses a device for testing mechanical properties of special circuit breakers. A test current source and a current sensor are connected in turn; a constant current source and a fracture voltage sensor are connected in turn; the current sensor and the fracture voltage sensor are connected with a multi-channel data conditioning circuit; the multi-channel data conditioning circuit and a multi-channel analog-to-digital (AD) converter are connected in turn and connected to a field programmable gate array (FPGA); a speed sensor and a speed measuring circuit are connected in turn and connected to the FPGA; a switch-off and switch-on control circuit and a fracture recording circuit are connected to the FPGA; and the FPGA, a personal computer 104 (PC104) bus interface, an industrial personal computer and a touch display are connected in turn. The device can meet the requirements of testing two kinds of special circuit breakers, namely a circuit breaker with a switch-on resistor, and a graphite contact circuit breaker from Siemens Company on site, and has the advantages of high automation degree in the whole test process, high test result accuracy, visual display and the like.
Description
Technical field
The utility model relates to a kind of equipment that the mechanical property of the extraordinary isolating switch that uses in the electric system is carried out verification; Relate in particular to a kind of isolating switch of band switching-on resistance and graphite contact breaker mechanic property testing system of Siemens Company of being applicable to.
Background technology
Isolating switch is control and a protection equipment important in the electric system, and to the important role in safe operation of electrical network, the reliability of isolating switch depends on the reliability of its mechanically actuated system to a great extent.According to GB50150-2006 " electrical equipment commissioning test standard " requirement, commissioning test must be carried out the test of mechanical property parameter.
Isolating switch is of a great variety, and wherein special with the graphite contact isolating switch method of testing of the isolating switch of switching-on resistance and Siemens Company, data analysis is complicated, and is high to relevant testing tool performance requirement, still do not have test macro effectively easily at present.
Summary of the invention
The purpose of the utility model provides testing requirements, the testing precision high extraordinary breaker mechanic property proving installation of a kind of satisfied scene to the graphite contact isolating switch of isolating switch and the Siemens Company of band switching-on resistance.
For realizing this purpose; The extraordinary breaker mechanic property proving installation that the utility model designed comprises measuring current source, current sensor, constant current source, fracture voltage sensor, multi-channel data modulate circuit, hyperchannel AD converter speed pickup, velocity survey circuit, divide-shut brake control circuit, fracture record wave circuit, field programmable gate array (FPGA), PC 104 EBIs, industrial computer, touch display;
Said measuring current source output terminal connects current sensor; Said 10A constant current source output terminal connects the fracture voltage sensor; The output terminal of current sensor and fracture voltage sensor is connected to the multi-channel data modulate circuit; Multi-channel data modulate circuit output terminal connects the hyperchannel AD converter, and hyperchannel AD converter output terminal connects said on-site programmable gate array FPGA;
The output terminal connection speed metering circuit of said speed pickup, the velocity survey circuit output end connects on-site programmable gate array FPGA;
Said fracture record wave circuit output terminal is connected to on-site programmable gate array FPGA, and the output terminal of programmable gate array FPGA connects the input end of divide-shut brake control circuit;
Said on-site programmable gate array FPGA, PC104 EBI, industrial computer are connected with touch display successively.
In technique scheme; Said measuring current source is in series through inner current-limiting resistance R and inner dc constant voltage source circuit; Connect with the switching-on resistance of tested isolating switch again; Produce the DC test electric current of 0-100mA, in the output test loop in measuring current source, be provided with the connection terminal that is used for connecting band switching-on resistance isolating switch fracture.
Further, said constant current source is provided with the connection terminal that is used to connect isolating switch graphite contact port for the DC source of output 10A electric current in the output test loop of constant current source.
Further; Be provided with six drive tests examination current source; Every drive test examination current source is in series through inner current-limiting resistance R and inner dc constant voltage source circuit; Connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of 0-100mA, in the output test loop in each measuring current source, be provided with the connection terminal that is used for connecting band switching-on resistance isolating switch fracture.
Further, be provided with six road constant-current source circuits, every road constant-current source circuit is the DC source of output 10A electric current, and the output test loop of constant current source is provided with the connection terminal that is used to connect isolating switch graphite contact port on every road.
In technique scheme, the multi-channel data modulate circuit carries out the conversion of electric current to voltage to the current signal of No. six current sensors output respectively, and the voltage signal after the conversion is carried out signal condition.The multi-channel data modulate circuit carries out the conversion of electric current to voltage to the current signal of No. six current sensors output respectively, and the voltage signal after the conversion is carried out signal condition.Simultaneously, the multi-channel data modulate circuit is also nursed one's health the voltage signal of six road fracture voltage sensors output respectively.12 channel voltage signals through behind the signal condition are switched by the action of the signal relay of 6 passages.Accomplish graphite contact fracture isolating switch or with the test of switching-on resistance fracture isolating switch.
Said hyperchannel AD converter carries out synchronous analog to digital conversion to six road voltage signals simultaneously, and the multi-channel data of conversion is outputed to field programmable gate array (FPGA) at a high speed
Said divide-shut brake control circuit is by constant pressure source; Action current sensor and power switch are formed; Action current sensor punching is connected in the test loop that constant pressure source and power switch be in series; Test loop is connected to the control output end, when the power switch conducting, constant voltage is applied to tested switching winding or closing coil.Simultaneously, the action current sensor is accomplished isolation conversion and the processing to the divide-shut brake coil current.
The isolation that said fracture record wave circuit is accomplished fracture voltage by photoisolator is changed, and the signal after the conversion is carried out discrete sampling.Obtain the action waveforms of fracture.
Can know that by technique scheme extraordinary breaker mechanic property proving installation is accomplished the separating brake and the combined floodgate of isolating switch through the divide-shut brake control circuit.The velocity survey circuit is accomplished the measurement of mechanical motion part travelling speed in the isolating switch course of action.The real-time waveform of fracture when fracture record wave circuit is accomplished the action of record isolating switch.The multi-channel data modulate circuit is accomplished the switching of the required passage of test event, and the sampling of real-time great dynamic range is carried out by the hyperchannel AD converter in the back.By field programmable gate array (FPGA) each data is carried out scratchpad in data-carrier store again; The instruction of the man-machine interaction of the data based touch display in the data-carrier store; Import temporary data high-speed into industrial computer through the PC104 EBI, by industrial computer analysis, calculating and demonstration as a result etc.
Therefore, the utility model adopts technique scheme, has following beneficial effect and advantage:
1, the utility model proving installation satisfies the requirement of breaker mechanic property parameter test among the GB GB50150-2006 " electrical equipment commissioning test standard ";
2, gather through the multi-channel and high capacity data in high speed, the automatic processing and the calculating of back-end data replace the analytical work of extraordinary isolating switch complex manual, reduce the randomness of test figure;
3, integrated extraordinary isolating switch and conventional circuit breaker pilot project satisfy the various testing requirementss of on-the-spot isolating switch in one;
4, the isolating switch configuration parameter of different model can remembered and manage to test macro automatically, thereby strengthen the standardization of site test, improves the work efficiency of site test.
Description of drawings
Fig. 1 is the block diagram of the utility model;
Fig. 2 is the breaker mechanic property measuring principle figure of single channel band switching-on resistance;
Fig. 3 is single channel graphite contact breaker mechanic property measuring principle figure.
Wherein:
1-measuring current source;
The 2-current sensor;
The 3-10A constant current source;
4-fracture voltage sensor;
5-multi-channel data modulate circuit;
6-hyperchannel AD converter;
The 7-speed pickup;
8-velocity survey circuit;
9-divide-shut brake control circuit,
10-fracture record wave circuit;
11-field programmable gate array (FPGA);
The 12-PC104 EBI;
The 13-industrial computer;
The 14-touch display.
Embodiment
Below in conjunction with accompanying drawing and instance the utility model is done further to specify:
One, general structure
Extraordinary breaker mechanic property proving installation as shown in Figure 1 comprises measuring current source 1, current sensor 2,10A constant current source 3, fracture voltage sensor 4, multi-channel data modulate circuit 5, hyperchannel AD converter 6, speed pickup 7, velocity survey circuit 8, divide-shut brake control circuit 9, fracture record wave circuit 10, on-site programmable gate array FPGA 11, PC104 EBI 12, industrial computer 13 and touch display 14; Measuring current source 1 output terminal connects current sensor 2; 10A constant current source 3 output terminals connect fracture voltage sensor 4; The output terminal of current sensor 2 and fracture voltage sensor 4 is connected to multi-channel data modulate circuit 5; Multi-channel data modulate circuit 5 output terminals connect hyperchannel AD converter 6, and hyperchannel AD converter 6 output terminals connect on-site programmable gate array FPGA 11.On-site programmable gate array FPGA 11, PC104 EBI 12, industrial computer 13 and touch display 14 link to each other successively.
Be provided with six drive tests examination current source 1; As shown in Figure 2; Every drive test examination current source is in series through inner current-limiting resistance R and inner dc constant voltage source circuit; Connect with the switching-on resistance of tested isolating switch, produce the DC test electric current of six road 0-100mA, six current sensors are connected in six tunnel output test loops through the mode of punching.In the output test loop in each measuring current source, be provided with the connection terminal that is used for connecting band switching-on resistance isolating switch fracture.Can accomplish test simultaneously with the mechanical property of the isolating switch of six road switching-on resistances.
Be provided with six road 10A constant current sources 3, as shown in Figure 3, it is not the DC current of 10A with the current constant of load variations that every road 10A constant current source is exported one respectively.Six road 10A constant current sources output test loop is drawn through the connection terminal that is used to connect graphite contact fracture isolating switch respectively.During test, be connected respectively to tested graphite fracture.Six fracture voltage sensors are connected in parallel on the two ends of the connection terminal that connects isolating switch graphite contact fracture respectively.Can accomplish the test of the mechanical property of six road graphite contact fracture isolating switchs simultaneously.
On-site programmable gate array FPGA 11; Form by a fpga chip and the coupled outer SDRAM of sheet; Carry out sequential through 11 pairs of hyperchannel AD converters of on-site programmable gate array FPGA and control collection accurately; Simultaneously, the data of the high-speed figure stream of 11 pairs of hyperchannel AD converter outputs of on-site programmable gate array FPGA are handled, are transmitted and preserve.
Principle of work of the utility model and function realize:
Extraordinary isolating switch test is meant the test to two kinds of isolating switchs, and a kind of is the isolating switch of band switching-on resistance, and a kind of is the graphite contact isolating switch of Siemens Company.Their method of testing is different from conventional isolating switch method of testing.
The isolating switch of band switching-on resistance has two moving contacts, and one is main contact, and another is auxilliary contact, has a switching-on resistance on the auxilliary contact.During combined floodgate, auxilliary contact closes earlier, and main contact closes again immediately, and after main contact closed, through the very short time time-delay, auxilliary contact can retract automatically, promptly only leans on main contact through-flow; During separating brake, by the main contact disjunction.This isolating switch mainly is used in transmission line of electricity and surpasses the high-tension line more than 100 kilometers, and purpose is the switching overvoltage of restriction making process.
Single channel transition resistance test philosophy such as Fig. 2.There is one road constant voltage power supply circuit Vcc proving installation inside, is connected through a current-limiting resistance R, current sensor and outside fracture.When closing a floodgate test, when auxilliary contact and main contact all do not close, test loop no current, current sensor no-output.When auxilliary contact closed, the isolating switch transition resistance inserted test loop, and test loop has electric current I, and current sensor has output.When main contact closed, the isolating switch transition resistance was by the main contact short circuit, and electric current I can increase, and remains certain value.Test loop range of current 0-100mA, full test transition resistance are 5k Ω.If the voltage of inner constant pressure source is Vcc, the resistance of inner current-limiting resistance is R, and the electric current that flows through test loop is I.The transition resistance resistance Rx of test does
Rx＝Vcc/I?-R
Can know according to following formula, after inner constant source voltage and current-limiting resistance are confirmed, the hyperchannel AD converter carried out the accurate high speed analog-to-digital conversion of sequential, obtain test loop electric current and sampling instant through on-site programmable gate array FPGA.By industrial computer the parameters such as time of closing transition resistance resistance, transition resistance turn-on time, main contact are analyzed, calculated to test data.Separating brake in like manner.There are 6 tunnel identical measurement loops proving installation inside, can measure the fracture of 6 road band switching-on resistance isolating switchs simultaneously.
And the structure of graphite contact isolating switch is special, and its moving contact front end roughly has the graphite section of 22mm, mainly is used for bearing the arcing of divide-shut brake process, reduces the scaling loss degree of contact metal part, prolongs the contact life-span.The characteristics of graphite contact section present the good conductor characteristic when being big electric current, and the nonmetal characteristic that appears during little electric current.
Single channel graphite contact test philosophy is seen Fig. 3; In every drive test examination loop, 10A constant current source outlet opening voltage 5V, the measuring current of the constant 10A of short-circuit current; Be connected to the fracture of tested graphite contact through splicing ear; At the two ends of the fracture of tested graphite contact parallel connection range is the fracture voltage sensor of 250mV, through measuring voltage sensor secondary voltage, can obtain fracture voltage.During the graphite contact breaker closing, graphite arcing contact and static contact metal water conservancy diversion bridge joint touch, and the constant measuring current I of 10A punctures graphite arcing contact, continuity test loop.Because of the characteristic of semiconductor of graphite arcing contact, graphite arcing contact contact area is little, and contact resistance value R is bigger, and fracture voltage U is also big.Along with the slip of graphite arcing contact, fracture voltage U is reduced to when equaling 10mV, has according to Ohm law
R＝U/I＝10mV/10A＝1mΩ
When being reduced to, graphite arcing contact contact resistance equals 1m Ω; Decidable moving contact graphite section contacts with static contact fully; Present moving contact back segment metal short circuit characteristic,, can obtain the feed motion time of graphite contact isolating switch through to the measurement constantly of metal short circuit.The principle that the separating brake process is same, along with the slip of graphite contact, the graphite contact contact resistance increases to the Ω greater than 1m, and fracture voltage is during greater than 10mV, and decidable moving contact metal section and part separates with static contact fully, is rendered as the characteristic of graphite contact contact.Through to metal separation measurement constantly, can obtain the separating brake actuation time of graphite contact isolating switch.There are six road 10A constant current sources proving installation inside, can measuring current is provided for simultaneously six fractures of graphite contact isolating switch, carries out the test of Siemens's six fracture graphite contact breaker mechanic properties.
On-site programmable gate array FPGA is made up of a fpga chip and the coupled outer SDRAM of sheet.On-site programmable gate array FPGA control hyperchannel AD converter carries out the sequential accurate signal to be changed synchronously.Simultaneously, the data of the high-speed figure stream of 11 pairs of hyperchannel AD converter outputs of on-site programmable gate array FPGA are handled, are transmitted and preserve.
Industrial computer is made up of industrial control computer.Link to each other with touch display.Touch display is accomplished the man-machine interaction work in the test process, shows various test datas, waveform and instruction input.Data by on-site programmable gate array FPGA control hyperchannel AD converter high speed acquisition are transferred to calculating, analysis, preservation and the output that industrial computer carries out signal data through the PC104 interface.Device can show fracture state waveform, the current waveform of divide-shut brake coil, stroke-time S-t curve by corresponding time coordinate, helps the accurate judgement to the breaker mechanism fault.Can obtain close time, main contact of auxilliary contact through computational analysis and close time, switching-on resistance turn-on time, switching-on resistance value, closing rebound number of times, the alternate same period etc., thereby accomplish test job band switching-on resistance isolating switch to waveform; And obtain graphite contact isolating switch metal short circuit constantly, and circuit-breaker switching on-off time, spring number of times, the alternate same period etc., thus test job accomplished to the graphite contact isolating switch.
Claims (5)
1. an extraordinary breaker mechanic property proving installation is characterized in that: comprise measuring current source (1), current sensor (2), constant current source (3), fracture voltage sensor (4), multi-channel data modulate circuit (5), hyperchannel AD converter (6) speed pickup (7), velocity survey circuit (8), divide-shut brake control circuit (9), fracture record wave circuit (10), field programmable gate array (11), PC 104 EBIs (12), industrial computer (13), touch display (14);
Said measuring current source (1) output terminal connects current sensor (2); Said 10A constant current source (3) output terminal connects fracture voltage sensor (4); The output terminal of current sensor (2) and fracture voltage sensor (4) is connected to multi-channel data modulate circuit (5); Multi-channel data modulate circuit (5) output terminal connects hyperchannel AD converter (6), and hyperchannel AD converter (6) output terminal connects said field programmable gate array (11);
The output terminal connection speed metering circuit (8) of said speed pickup (7), velocity survey circuit (8) output terminal connects field programmable gate array (11);
Said fracture record wave circuit (10) output terminal is connected to field programmable gate array (11), and the output terminal of programmable gate array (11) connects the input end of divide-shut brake control circuit (9);
Said field programmable gate array (11), PC104 EBI (12), industrial computer (13) and touch display (14) are connected successively.
2. extraordinary breaker mechanic property proving installation according to claim 1; It is characterized in that: said measuring current source (1) is in series through inner current-limiting resistance R and inner dc constant voltage source circuit; Connect with the switching-on resistance of tested isolating switch again; Produce the DC test electric current of 0-100mA, in the output test loop of measuring current source (1), be provided with the connection terminal that is used for connecting band switching-on resistance isolating switch fracture.
3. extraordinary breaker mechanic property proving installation according to claim 1; It is characterized in that: said constant current source (3) is provided with the connection terminal that is used to connect isolating switch graphite contact port for the DC source of output 10A electric current in the output test loop of constant current source (3).
4. extraordinary breaker mechanic property proving installation according to claim 2; It is characterized in that: be provided with six drive tests examination current source (1); Every drive test examination current source (1) is in series through inner current-limiting resistance R and inner dc constant voltage source circuit; Connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of 0-100mA, in the output test loop in each measuring current source (1), be provided with the connection terminal that is used for connecting band switching-on resistance isolating switch fracture.
5. extraordinary breaker mechanic property proving installation according to claim 3; It is characterized in that: be provided with six road constant-current source circuits (3); Every road constant-current source circuit (3) is the DC source of output 10A electric current, and the output test loop of constant current source (3) is provided with the connection terminal that is used to connect isolating switch graphite contact port on every road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202778334U CN202256613U (en) | 2011-08-02 | 2011-08-02 | Device for testing mechanical properties of special circuit breakers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202778334U CN202256613U (en) | 2011-08-02 | 2011-08-02 | Device for testing mechanical properties of special circuit breakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202256613U true CN202256613U (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202778334U Withdrawn - After Issue CN202256613U (en) | 2011-08-02 | 2011-08-02 | Device for testing mechanical properties of special circuit breakers |
Country Status (1)
| Country | Link |
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| CN (1) | CN202256613U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411124A (en) * | 2011-08-02 | 2012-04-11 | 广东威恒输变电工程有限公司 | Mechanical property test device for special breaker |
| CN106646218A (en) * | 2017-02-10 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Device for simulating high-voltage circuit breakers and method for simulating and testing same |
-
2011
- 2011-08-02 CN CN2011202778334U patent/CN202256613U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411124A (en) * | 2011-08-02 | 2012-04-11 | 广东威恒输变电工程有限公司 | Mechanical property test device for special breaker |
| CN106646218A (en) * | 2017-02-10 | 2017-05-10 | 云南电网有限责任公司电力科学研究院 | Device for simulating high-voltage circuit breakers and method for simulating and testing same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120530 Effective date of abandoning: 20130925 |
|
| RGAV | Abandon patent right to avoid regrant |