CN208721742U - A kind of portable high-pressure auxiliary switch for circuit breaker resistance meter - Google Patents
A kind of portable high-pressure auxiliary switch for circuit breaker resistance meter Download PDFInfo
- Publication number
- CN208721742U CN208721742U CN201821453393.1U CN201821453393U CN208721742U CN 208721742 U CN208721742 U CN 208721742U CN 201821453393 U CN201821453393 U CN 201821453393U CN 208721742 U CN208721742 U CN 208721742U
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- circuit
- switch
- auxiliary switch
- portable high
- resistance meter
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Abstract
The utility model discloses a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter, including master controller, contacting controling circuit, sub-gate control circuit, AD sample circuit, switching switch, constant current source generating circuit, touch screen and power module, wherein, master controller is connect with contacting controling circuit, sub-gate control circuit, AD sample circuit, touch screen and power module respectively, the output end connection switching switch of AD sample circuit, the switching switch is connect with measured switch, and the constant current source generating circuit is connect with measured switch.Such technical solution can find running high-voltage circuitbreaker failure in time, improve operational reliability.
Description
Technical field
The utility model belongs to the field of test technology, in particular to a kind of portable high-pressure auxiliary switch for circuit breaker resistance is surveyed
Try instrument.
Background technique
With the high speed development of smart grid, pith of the high-voltage circuitbreaker as electric system is directly related to electricity
The stabilization of the safety of net operation, high voltage breaker auxiliary switch[1]It is connected on high-voltage breaker operation mechanism driving lever axis
Low-voltage signal switch, frequently as the switching on and off control switch and interlock protection contact in secondary control loop[2].When height presses off
When the auxiliary switch of pass breaks down, it will affect control and signal circuit, whole breaker even power grid can all be caused sternly
The harm of weight.So must the breaking capacity of close inspection auxiliary switch and leading for all contacts during checking breaker
It is logical.When auxiliary switch contact closure conduction, then contact surface has contact resistance, and generating Joule heat makes contact surface temperature rise, increases
Big contact resistance, can make contact surface melt weldering, make auxiliary switch when the joule heating effect caused by contact resistance is serious
Act it is interrupted, therefore when periodic inspection measure auxiliary switch contact resistance value be also highly important.
Currently, it is to measure auxiliary switch contact circuit respectively by multimeter that the country, which inspects periodically auxiliary switch for circuit breaker,
Situation and resistance value is connected and using the hand-written collected data of method record institute[3], a killer switch contact probably has
16 pairs, such method is time-consuming and laborious, and measure during staff operation error or other factors, cause to measure
As a result the current state in which of breaker can not be really reacted, there will be a very big security risk.Therefore, it is necessary to
The instrument of one special detection auxiliary switch.
Wherein, the attachment being related to is as follows:
[1] analysis of Lv Xiangyun, Ji Xinming high voltage breaker auxiliary switch detection technique and research [J] water conservancy and hydropower,
2015.(13):162。
[2] discussion [J] the experience exchangement of Guan Jianxia medium voltage breaker auxiliary switch, 2015. (13): 41-48.
[3] Tan's exhibition, improvement [J] electrification of the countryside of the high voltage breaker auxiliary switch detection technique such as Liu Fei Dong Yuan,
2014.(07)。
Utility model content
The purpose of this utility model is to provide a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter, can
Running high-voltage circuitbreaker failure is found in time, improves operational reliability.
In order to achieve the above objectives, the solution of the utility model is:
A kind of portable high-pressure auxiliary switch for circuit breaker resistance meter, including master controller, contacting controling circuit, separating brake
Control circuit, AD sample circuit, switching switch, constant current source generating circuit, touch screen and power module, wherein master controller point
Do not connect with contacting controling circuit, sub-gate control circuit, AD sample circuit, touch screen and power module, AD sample circuit it is defeated
Outlet connection switching switch, the switching switch are connect with measured switch, and the constant current source generating circuit is connect with measured switch.
Above-mentioned master controller uses STC12LE5A60S2.
Above-mentioned AD sample circuit uses CS5464.
Above-mentioned constant current source generating circuit includes HT7533, first resistor, first capacitor and the second capacitor, wherein the first electricity
One end of appearance, the input terminal of HT7533 are all connected with VCC, and one end of the second capacitor, one end of first resistor connect the defeated of HT7533
Outlet, the other end of first capacitor, the ground terminal of HT7533, the other end of the second capacitor, first resistor the other end be grounded,
And the output end as constant current source generating circuit.
Above-mentioned contacting controling circuit includes optocoupler, second resistance, 3rd resistor, triode and solid-state relay, wherein light
The input anode of coupling connects VCC, and input cathode connects master controller, and the output head anode of optocoupler is connected via second resistance
The negative pole of output end of VCC, optocoupler are grounded via 3rd resistor, and negative pole of output end is also connected with the base stage of triode, the hair of triode
Emitter grounding, the third end of the collector connection solid-state relay of triode, the first end of solid-state relay connect VCC, solid-state
Output end of the second end of relay as contacting controling circuit.
Above-mentioned switching switch uses CD4051.
After adopting the above scheme, the utility model measures resistance value using voltammetry, is generated using voltage stabilizing chip HT7533
Constant electric current, and with 24 sampling with high precision chip CS5464 and switching switch chip CD4051 acquisition resistance both ends electricity
Pressure.In addition, system is connected by level signal chip SP3485EN with touch screen TK6070IQ, by intuitive measurement results show
Show on the touchscreen, and can save the data in touch screen.Auxiliary switch is carried out finally, building model in laboratory
Measurement experiment, measurement result show that the module can accurately test the value of auxiliary switch contact resistance, judge for service personnel auxiliary
The service life of switch is helped to provide reliable basis.
Detailed description of the invention
Fig. 1 is the hardware structure diagram of the utility model；
Fig. 2 is the AD sample circuit figure in the utility model；
Fig. 3 is the sampling switch circuit figure in the utility model；
Fig. 4 is output voltage and input voltage curve graph；
Fig. 5 is the constant current source circuit diagram in the utility model；
Fig. 6 is the contacting controling circuit figure in the utility model；
Fig. 7 is the main program flow chart of the utility model；
Fig. 8 is the touch screen interface schematic diagram in the utility model.
Specific embodiment
Below with reference to attached drawing, the technical solution of the utility model is described in detail.
As shown in Figure 1, the utility model from the aspect of storage, portability, processing accuracy, provides a kind of portable high-pressure
Auxiliary switch for circuit breaker resistance meter controls breaker by STC12LE5A60S2 and closes the movement of (dividing) lock, then to breaker
Auxiliary switch status is acquired, and it will be shown in touchings after being analyzed and processed using parameter of the STC12LE5A60S2 to acquisition
It touches screen above and is stored, specifically include master controller, contacting controling circuit, sub-gate control circuit, AD sample circuit, switch and open
Pass, constant current source generating circuit, touch screen and power module, wherein after system electrification, system parameter setting is completed by key,
It is issued by STC12LE5A60S2 and closes (dividing) lock control command, breaker is closed and (divided) lock movement.Constant current source generating circuit starts
Constant current value is generated, flows through measured switch contact, and generate voltage at the both ends of auxiliary switch, these voltage analogs are equal
Digital quantity is acquired and be converted to by CS5464, digital quantity signal is then acquired by STC12LE5A60S2, according to Ohm's law meter
Resistance value is calculated, and measured resistance value is uploaded touch screen by modbus protocol packing, after measurement, by resistance
Value is shown in above touch screen and is stored；Finally, carrying for convenience, system power supply module is supplied using high capacity cell
Electricity.
In order to realize high-precision sampling, increase the accuracy of acquisition analog quantity, the selection of AD sample circuit extends out sampling core
The CS5464 that piece is 24, the chip are one piece of electric energy computation chips, can acquire two-way line voltage, temperature and electric current and exportable have
Function power and reactive power.And built-in chip type filter, output voltage can be directly accessed the input pin of the analog quantity of chip.
And electric current input pin IIN full scale incoming signal level ± 50mV or ± 250mV, the input of voltage input pin VIN full scale
Signal level is ± 250mV.2 rank Δ ∑ modulators of voltage and temperature channel, two current channels will with 4 rank Δ ∑ modulators
Mould input is converted into digital signal.The rate of conversion sampling is DCLK/8.Therefore the analog signal in order to guarantee higher precision, it adopts
It is acquired with channel current signal IIN+.
AD sample circuit is as shown in Figure 2.Pin " 20 " is voltage analog input terminal, and other not applicable analog signals are drawn
Foot is all grounded, and pin " 23 " is A/D chip reset pin, low level is effective, needs to be answered to the no less than low level of 10ms
Position, pin " 8 " connect high level and indicate to be adopted as microcontroller using E2PROM, low level expression, which is defaulted as low level.
Pin " 7 " is that chip selection signal low level is effective, and pin " 5 ", " 6 ", " 27 " pin are respectively SPI high-speed synchronous serial clock, defeated
Enter, output pin, can SPI pin directly corresponding with STC12LE5A60S2 be connected.Start to carry out when sending 0x8e to CS5464
The data of storage in a register are read in sampling, the order for then sending corresponding registers.
Due to only with one input channel of A/D chip, but at least need to survey every time during breaker switching on and off
The value of 8 pairs of contact resistances is measured, therefore we select chip CD4051 that CS5464 is cooperated to use, CD4051 is equivalent to a hilted broadsword
8 switches thrown, which channel of switch connection is the three bit address codes " A ", " B ", " C " by inputting come what is determined, and pin is connected
To the corresponding pin of STC12LE5A60S2, by way of macrodefinition in a program, to determine using which channel.Pin " 7 "
To forbid holding, low level is effective, is directly connected to the ground.It is as shown in Figure 3 to switch on-off principle figure.
In the present embodiment, using HT7533 as voltage stabilizing chip, it has fixed three-terminal voltage-stabilizing circuit simplest
The advantages that form, and have low-power consumption, low pressure drop, output voltage may be up to 30V, input and output voltage known to inquiry datasheet
Relational graph (as shown in Figure 4), output voltage hardly follows the variation of input voltage and changes, and stablizes in 3.32V.Due to AD core
The range of piece is ± 50mV or ± 250mV, and inquires data auxiliary switch contact resistance and be generally tens milliohms between several Europe.
Therefore Constant Current-Source Design figure is as shown in Figure 5.IssIt is to adjust electric current,
General 2.5uA≤Iss≤ 4.0uA can be neglected, therefore Iout=16.6mA.
Contacting controling circuit is identical as the structure of sub-gate control circuit and principle.By taking contacting controling circuit as an example, principle is such as
Shown in Fig. 6, when touch screen, which issues, closes a floodgate order, P0.3 pin is low level, and optocoupler work exports electricity by voltage follower
Pressure, driving solid-state relay work, closing circuit conducting, breaker carry out feed motion；When otherwise P0.3 pin is high level,
Optocoupler does not work, and solid-state relay is not turned on, and mechanism is without feed motion.
System main flow chart initializes system as shown in fig. 7, after system electrification, and A/D chip is calibrated, at the beginning of I/O mouthfuls
Beginningization, the initialization of master controller inside SPI module, timer initialization set the timer sampling period；Initialization is completed
Afterwards, transport protocol is set, mainly baud rate, parity check bit, data bit etc.；Then it waits controller to issue to close
(dividing) lock control command, when detecting combined floodgate order, calls switching switch subprogram switching acquisition channel for closing a floodgate,
Combined floodgate sampling subprogram is called simultaneously, acquires voltage caused by tested contact both ends, when all successively sampling terminates in eight channels；
Call parameters counting subroutine calculates corresponding resistance value；It can control display by touch screen and store these information.
Using the VD4/CX 12.12.32 vacuum circuit breaker of ABB as test object, auxiliary switch for circuit breaker contact resistance is tested
Value, by Air Canada's blind plug and aviation plug be not added compare, because not knowing that practical auxiliary switch contact resistance value is big
It is small that measurement (as shown in Figure 8) is compared using multimeter.It is obtained shown in table 1 by measurement.Because the value of contact resistance is smaller,
In measurement process due to flow through an electric current fever and other irresistible interference, keep the certain value errors of measurement result excessive,
Worst error is 17%, minimal error 7%, due to resistance itself the experimental results showed that, the test result error of this system compared with
Small, precision is higher, can correctly measure the resistance value of auxiliary switch for circuit breaker.
The comparison of 1 test parameter of table
In summary, a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter of the utility model, realizes high pressure
The design of auxiliary switch for circuit breaker contact resistance tester, system collection control, test, data show, data processing, figure show
Show, data storage is integrated, can control breaker close (divide) lock movement, be able to achieve high voltage breaker auxiliary switch contact resistance believe
Number synchronous acquisition, can save the data on touch screen, eliminate the dependence to PC machine.Test result precision is up to standard, interface letter
Clean intuitive easily operated, system stability is good.System more can accurately test the resistance value and reliability of contact of auxiliary switch,
To provide reliable foundation for repair based on condition of component, there are boundless market prospects and research significance.
Above embodiments are only to illustrate the technical idea of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is all according to the utility model proposes technical idea, any changes made on the basis of the technical scheme each falls within this reality
Within the scope of novel protected.
Claims (6)
1. a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter, it is characterised in that: including master controller, shutting-brake control
Circuit, sub-gate control circuit, AD sample circuit, switching switch, constant current source generating circuit, touch screen and power module, wherein main
Controller is connect with contacting controling circuit, sub-gate control circuit, AD sample circuit, touch screen and power module respectively, AD sampling
The output end connection switching switch of circuit, the switching are switched and are connect with measured switch, the constant current source generating circuit with it is to be measured
Switch connection.
2. a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter as described in claim 1, it is characterised in that: described
Master controller uses STC12LE5A60S2.
3. a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter as described in claim 1, it is characterised in that: described
AD sample circuit uses CS5464.
4. a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter as described in claim 1, it is characterised in that: described
Constant current source generating circuit includes HT7533, first resistor, first capacitor and the second capacitor, wherein one end of first capacitor,
The input terminal of HT7533 is all connected with VCC, one end of the second capacitor, one end connection HT7533 of first resistor output end, first
The other end of capacitor, the ground terminal of HT7533, the other end of the second capacitor, first resistor the other end be grounded, and as perseverance
Flow the output end of source generating circuit.
5. a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter as described in claim 1, it is characterised in that: described
Contacting controling circuit includes optocoupler, second resistance, 3rd resistor, triode and solid-state relay, wherein the input of optocoupler is rectified
Pole connects VCC, and input cathode connects master controller, and the output head anode of optocoupler connects VCC via second resistance, optocoupler it is defeated
Outlet cathode is grounded via 3rd resistor, and negative pole of output end is also connected with the base stage of triode, the emitter ground connection of triode, three poles
The third end of the collector connection solid-state relay of pipe, the first end of solid-state relay connect VCC, the second end of solid-state relay
Output end as contacting controling circuit.
6. a kind of portable high-pressure auxiliary switch for circuit breaker resistance meter as described in claim 1, it is characterised in that: described
Switching switch uses CD4051.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821453393.1U CN208721742U (en) | 2018-09-06 | 2018-09-06 | A kind of portable high-pressure auxiliary switch for circuit breaker resistance meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821453393.1U CN208721742U (en) | 2018-09-06 | 2018-09-06 | A kind of portable high-pressure auxiliary switch for circuit breaker resistance meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208721742U true CN208721742U (en) | 2019-04-09 |
Family
ID=65981231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821453393.1U Expired - Fee Related CN208721742U (en) | 2018-09-06 | 2018-09-06 | A kind of portable high-pressure auxiliary switch for circuit breaker resistance meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208721742U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034280A (en) * | 2020-07-23 | 2020-12-04 | 郑州地铁集团有限公司运营分公司 | Portable platform door system multichannel detection switch testing arrangement |
| CN114200295A (en) * | 2021-12-13 | 2022-03-18 | 国网福建省电力有限公司晋江市供电公司 | Plug connector switching method for mechanical characteristic test of 10KV circuit breaker |
-
2018
- 2018-09-06 CN CN201821453393.1U patent/CN208721742U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034280A (en) * | 2020-07-23 | 2020-12-04 | 郑州地铁集团有限公司运营分公司 | Portable platform door system multichannel detection switch testing arrangement |
| CN112034280B (en) * | 2020-07-23 | 2023-08-08 | 郑州地铁集团有限公司运营分公司 | Portable platform door system multiplex detection switch testing arrangement |
| CN114200295A (en) * | 2021-12-13 | 2022-03-18 | 国网福建省电力有限公司晋江市供电公司 | Plug connector switching method for mechanical characteristic test of 10KV circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190409 Termination date: 20210906 |