CN208443978U - A kind of DC relay tester - Google Patents
A kind of DC relay tester Download PDFInfo
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- CN208443978U CN208443978U CN201820758730.1U CN201820758730U CN208443978U CN 208443978 U CN208443978 U CN 208443978U CN 201820758730 U CN201820758730 U CN 201820758730U CN 208443978 U CN208443978 U CN 208443978U
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Abstract
The utility model relates to a kind of DC relay testers, for the verification to direct current 220V and following current mode, voltage-type, power-type relay and similar devices, to guarantee the correct operation of substation relay protection device.The tester is mainly made of single-chip microcontroller, adjustable DC power supply, over-current and -load protection, power module, liquid crystal display panel, switch acquisition processing system, Current Voltage acquisition system module etc.；Single-chip microcontroller is electrically connected with switch acquisition processing system, adjustable DC power supply, power module, liquid crystal display panel respectively, single-chip microcontroller has the function of to store program, monitoring input, internal calculation, output control instruction etc., by serial communication mode and Current Voltage acquisition system, liquid crystal display panel, adjustable DC power source communications completion input/output function.The DC relay tester can have many advantages, such as safe and reliable, high-efficient, applied widely, easy to carry according to different needs and environmental selection automatic mode or manual mode.
Description
Technical field
The utility model relates to verify the instrument of electrical equipment, specifically: being that a kind of pair of relay performance verifies
Instrument.
Background technique
DC relay is the important devices of the relay protection of substation equipment.When transfer trip occurs for equipment, failure opens
When dynamic, the protection of transformer non-electricity etc. is usually accessed through long cable, is grounded in direct current system, is mixed into direct current in exchange
And in the case where there is stronger external electromagnetic field, it is easily introduced interference signal.For this reason, it may be necessary to carry out school to its operating power etc.
It tests, to guarantee its anti-interference ability.
Element similar with DC relay, such as optic coupling element, from isolating and protecting device and external circuit electrical link
Angle is set out, and certain Anti-Jamming can be played, and for opening the optic coupling element introduced into signal, operation voltage should be controlled
Reasonable horizontal.But too low operation voltage cannot play due inhibiting effect to external disturbance；Excessively high movement electricity
Pressure, then may be decreased sensitivity.
General office of State Grid Corporation of China makes " the great anti-accident of 18 power grids of State Grid Corporation of China on March 27th, 2012
Measure " (revised edition) regulation: the important circuit directly tripped is related to, it should be using operation voltage in nominal DC power supply voltage
55%~70% range within intermediate relay, and require its operating power not less than 5W；Optocoupler open into operation voltage
It should control within 55%~70% range of nominal DC power supply voltage.So be sought after one kind can to such direct current after
The instrument that electric appliance or like device performance are specially debugged.
Summary of the invention:
The purpose of this utility model is to provide a kind of DC relay tester, which can be quickly and conveniently right
Direct current 220V and following current mode, voltage-type, power-type relay are verified, and DC relay movement can be accurately measured
Electric current, operation voltage and operating power.
The utility model is realized in this way:
DC relay tester is mainly made of following component: single-chip microcontroller, adjustable DC power supply, over-current and -load are protected
The composition such as shield, power module, liquid crystal display panel, switch acquisition system, Current Voltage acquisition system.
The single-chip microcontroller is core component, has the function such as storage program, monitoring input, internal calculation, output control instruction
Can, input/output function relies on serial communication mode and Current Voltage acquisition system, liquid crystal display panel, adjustable DC power supply
Communication is to complete.
The switch acquisition processing system completes ordinary tap amount and enters the processing of circuit before single-chip processor i/o system, protects
The external acquisition switching value resolution ratio such as card feedback contact input terminal switch amount, mode selection switch is not more than 1ms, disappears and trembles the time
Not less than 5ms.On circuit --- directly by treated On-off signal single-chip processor i/o system.
The liquid crystal display panel is connected by serial communication mode with single-chip microcontroller, and display single-chip microcontroller transmits direct current
The output real time datas such as Current Voltage power magnitude and operating mode in real time, on circuit --- pass through connection and single-chip microcontroller connects
It connects.
The power module, offer 5V DC power supply makes for single-chip microcontroller and liquid crystal display panel after inputting 220V AC power source
With.On circuit --- it is connected directly with over-current and -load protection, single-chip microcontroller and liquid crystal display panel.
The over-current and -load protection after AC power source enters tester, first passes around over-current and -load protection: when electric current is more than
3A guarantees reliably to cut off verification when preventing various instrument internal short circuits to adjustable dc voltage and power module power supply in 1 second
The aggravation of instrument damaged condition.
The adjustable DC power supply: in a manual mode --- changed by thick (micro-) tune knob and exports direct current；Certainly
Under dynamic model formula --- communication instruction is controlled by single-chip microcontroller, changes and exports direct current.On circuit --- pass through connection and monolithic
Machine connection, output loop are connected with DC output terminal, power input circuit and over-current and -load protection connection.
The tester includes automatic mode and manual mode.
In test process under automatic mode: introducing DC relay and feed back contact, when tester output voltage boosts to
When actuating of relay value, relay feeds back contact as On-off signal single-chip microcontroller, and adjustable DC power supply is immediately controlled in single-chip microcontroller
Stop boosting, and records DC voltage value U0 at this time；Then single-chip microcontroller controls adjustable DC power voltage step down to zero, makes relay
After return, the 95% of first time operation voltage U0 is instantaneously boosted to for the second time, is then slowly risen by the rate of U0*0.5%V/S
Pressure records until relay acts again and shows DC voltage, electric current, performance number at this time, as final relay performance
Index value.
In test process under manual mode: manual adjustment knob makes adjustable DC electric power output voltage boost to relay
When device action value, relay feeds back contact as On-off signal single-chip microcontroller, while panel contact indicator light reddens, and single-chip microcontroller is vertical
I.e. control stops boosting, records and shows DC voltage, electric current, performance number at this time, as final relay performance index value.
The DC relay tester of the utility model, preferably solves following problems:
First is that the debugging function for once-through type electric current, voltage, power relay is incorporated, in relay protection check
It can be used for the verification of DC relay or its like device performance.
Second is that introducing feedback contact under automatic mode in test process, lifting DC voltage is controlled using single-chip microcontroller, is guaranteed
Test speed, reduces the relay coil pressure-bearing time, prevents the damage of relay in test process.
Third is that using DC relay: when measuring for the first time, DC voltage value is initial value under automatic mode in test process；
When double measurement, the 95% of initial value is instantaneously boosted to, relay is then slowly boosted to and acts again, by the direct current of double measurement
Voltage and current performance number ensure that the accuracy of measurement data as final measured value.
The tester is suitable for the qualification of direct current 220V and following relay and similar products.Can guarantee direct current after
Electrical function tests the correctness of instrument, has many advantages, such as safe and reliable, high-efficient, applied widely, easy to carry.
With reference to the accompanying drawings and examples, the utility model is described further.
Detailed description of the invention
Fig. 1, the present embodiment debugging instrument circuit theory schematic diagram.
Fig. 2, the utility model embodiment debugging instrument man-machine panel layout and operation setting schematic diagram.
Specific embodiment
Embodiment 1, a kind of once-through type relay characteristic tester
Fig. 1 shows the circuit theory of the present embodiment once-through type relay characteristic tester: mainly by single-chip microcontroller, straight-adjustable
The groups such as galvanic electricity source, over-current and -load protection, power module, liquid crystal display panel, switch acquisition system, Current Voltage acquisition system
At.
Single-chip microcontroller has the function of to store program, monitor input, internal calculation, output control instruction etc. as core component,
Its input/output function is logical by serial communication mode and Current Voltage acquisition system, liquid crystal display panel, adjustable DC power supply
Letter is completed.
Switch acquisition processing system completes ordinary tap amount and enters the processing of circuit before single-chip processor i/o system, guarantees anti-
Contact input terminal switch amount, mode selection switch etc. are presented, outside acquisition switching value resolution ratio is not more than 1ms, disappears and tremble the time not
Less than 5ms.Its circuit --- directly by treated On-off signal single-chip processor i/o system.
Liquid crystal display panel is connected by serial communication mode with single-chip microcontroller, and it is real-time that display single-chip microcontroller transmits direct current
Export the real time datas such as Current Voltage power magnitude and operating mode.Its circuit-is connected by connection with single-chip microcontroller.
Power module provides 5V DC power supply for single-chip microcontroller and liquid crystal display panel use after inputting 220V AC power source.
Its circuit --- it is connected directly with over-current and -load protection, single-chip microcontroller and liquid crystal display panel.
Over-current and -load protection after AC power source enters tester, first passes around over-current and -load protection, when electric current is more than 3A
When, guarantee reliably to cut off verification when preventing various instrument internal short circuits to adjustable dc voltage and power module power supply in 1 second
The aggravation of instrument damaged condition.
Adjustable DC power supply changes and exports direct current by thick (micro-) tune knob in a manual mode, in automatic mode
Changed by the control communication instruction of single-chip microcontroller and exports direct current.Its circuit --- it is connected, is exported with single-chip microcontroller by connection
Circuit is connected with DC output terminal, power input circuit and over-current and -load protection connection.
Fig. 2 shows the layout and operation setting of the man-machine panel of the present embodiment debugging instrument.Below in conjunction with operating procedure and
Practical operation on man-machine panel describes the course of work of debugging instrument:
1. tester is tested, power supply line and device ground line are connected first, is turned on the power switch, determination " starts/stops
Only " button indicating lamp is green, and the corresponding direct current output for being connected to tester panel of DC relay coil positive and negative anodes is positive and negative
One group of normal opened contact of DC relay is connected at feedback contact input terminal by end.
Mode switch is such as selected as automatic mode, presses " starting/stopping " button, button indicating lamp becomes red, school
It tests instrument to start to test automatically, liquid crystal display panel real-time display relay current, voltage and power.After the completion of test, liquid crystal
Display panel can show the final action current of relay, operation voltage and operating power, press " starting/stopping " again and press
Button, button indicating lamp become green, and liquid crystal display resets, and test terminates.
Mode switch is such as selected as manual mode, presses " starting/stopping " button, button instruction etc. becomes red, school
It tests instrument to start to test, manually adjusts coarse adjustment knob and vernier knob changes output DC voltage value, liquid crystal display panel is shown in real time
Show relay current, voltage and power；After the actuating of relay, contact indicator light brightens, while cutting manually adjusts function,
Direct current output drops to zero automatically, and liquid crystal display panel shows actuating of relay electric current, operation voltage and operating power；It presses again
Under " starting/stopping " button, button indicating lamp becomes green, and liquid crystal display resets, and test terminates.
When occurring internal short circuit fault in test process, electric current more than 3A, can once be protected in 1 second by over-current and -load
It cuts off to adjustable dc voltage and power module power supply.
The main specifications parameter of the tester of the present embodiment is as follows:
1. input voltage: 220V 50Hz
2. measuring relay voltage range: DC 0-300V
3. measuring relay current range: DC 0-0.5A
4. display resolution: voltage 0.1V, electric current 0.1mA
5. voltage stability :≤0.2%
6. current stability:≤0.5%
7. laod stability :≤0.5%
8. ripple and noise :≤1%RMS
9. working environment: 0-40 DEG C of relative humidity < 80%
10. storage condition: -20-80 DEG C of relative humidity < 80%
11. apparent size: long 320mm* wide 200mm* high 150mm.
Claims (1)
1. a kind of DC relay tester, it is characterised in that: mainly protected by single-chip microcontroller, adjustable DC power supply, over-current and -load,
Power module, liquid crystal display panel, switch acquisition processing system, Current Voltage acquisition system composition；Single-chip microcontroller respectively with open
Measure acquisition processing system, adjustable DC power supply, power module, liquid crystal display panel electrical connection in pass；
The single-chip microcontroller is logical by serial communication mode and Current Voltage acquisition system, liquid crystal display panel, adjustable DC power supply
Letter stores program, monitoring input, internal calculation, the input/output function for exporting control instruction to complete to have；
The switch acquisition processing system, switching value resolution ratio are not more than 1ms, disappear and tremble the time not less than 5ms；It will be by processing
On-off signal single-chip processor i/o system；
The liquid crystal display panel, over-current and -load protection, single-chip microcontroller and liquid crystal display panel are connected；By serial communication mode
It is connected with single-chip microcontroller；
The power module provides 5V DC power supply and uses for single-chip microcontroller and liquid crystal display panel；
The adjustable DC power supply: under manual mode, changed by thick, vernier knob and export direct current；In automatic mode,
By the control communication instruction of single-chip microcontroller, changes and export direct current；It is connected by connection with single-chip microcontroller, the same direct current of output loop
Output terminal connection, electric current input circuit and over-current and -load protection connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758730.1U CN208443978U (en) | 2018-05-14 | 2018-05-14 | A kind of DC relay tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820758730.1U CN208443978U (en) | 2018-05-14 | 2018-05-14 | A kind of DC relay tester |
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| Publication Number | Publication Date |
|---|---|
| CN208443978U true CN208443978U (en) | 2019-01-29 |
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ID=65091974
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| CN201820758730.1U Active CN208443978U (en) | 2018-05-14 | 2018-05-14 | A kind of DC relay tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161429A (en) * | 2019-05-24 | 2019-08-23 | 深圳市乐得瑞科技有限公司 | Power supply adaptor test method, device, server and storage medium |
| CN110504656A (en) * | 2019-07-12 | 2019-11-26 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of overcurrent protective device of DC earthing |
| CN110749819A (en) * | 2019-11-20 | 2020-02-04 | 中国南方电网有限责任公司超高压输电公司广州局 | Circuit breaker divide-shut brake dropout action voltage testing arrangement |
| CN116706924A (en) * | 2023-04-27 | 2023-09-05 | 华能澜沧江水电股份有限公司 | Voltage stabilization control method based on relay calibrator |
-
2018
- 2018-05-14 CN CN201820758730.1U patent/CN208443978U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161429A (en) * | 2019-05-24 | 2019-08-23 | 深圳市乐得瑞科技有限公司 | Power supply adaptor test method, device, server and storage medium |
| CN110504656A (en) * | 2019-07-12 | 2019-11-26 | 国网浙江省电力有限公司嘉兴供电公司 | A kind of overcurrent protective device of DC earthing |
| CN110749819A (en) * | 2019-11-20 | 2020-02-04 | 中国南方电网有限责任公司超高压输电公司广州局 | Circuit breaker divide-shut brake dropout action voltage testing arrangement |
| CN116706924A (en) * | 2023-04-27 | 2023-09-05 | 华能澜沧江水电股份有限公司 | Voltage stabilization control method based on relay calibrator |
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