CN208443983U - Small-sized DC circuit breaker anti-time limit characteristic measurement device - Google Patents
Small-sized DC circuit breaker anti-time limit characteristic measurement device Download PDFInfo
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- CN208443983U CN208443983U CN201821251230.5U CN201821251230U CN208443983U CN 208443983 U CN208443983 U CN 208443983U CN 201821251230 U CN201821251230 U CN 201821251230U CN 208443983 U CN208443983 U CN 208443983U
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Abstract
A kind of small-sized DC circuit breaker anti-time limit characteristic measurement device has power supply circuit with rectifier on working plate, with rheostat, detection ammeter, the detection circuit of dc circuit breaker and timing circuit with digital timer.When measurement, the power input of working plate is connected with power supply, close dc circuit breaker, standardsizing rheostat allows the electric current of detection ammeter in the initial Ie value of the different multiples Ie of selection, separate dc circuit breaker, the separated small-sized DC circuit breaker that needs are detected is connected in the detection terminals of working plate, close small-sized DC circuit breaker, then small-sized DC circuit breaker works at an overload current Ie of selection, digital timer indicates operating time of protection, with a series of this available corresponding overload current and operating time of protection, produce the anti-time limit characteristic curve of small-sized DC circuit breaker.The device structure of the utility model is simple, cheap, easy to operate.
Description
Technical field
The utility model relates to a kind of measurement device of small-sized DC circuit breaker, especially a kind of small-sized DC circuit breaker
Overcurrent anti-time limit characteristic measurement device.
Background technique
Small-sized DC circuit breaker is one of the most common type in low-voltage circuit breaker, is mainly used for voltage rating 250V ~ 1000v,
Rated operational current infrequently turns into the DC line of 1 ~ 60A as the overload to DC line, short-circuit protection and route
Alternatively use.
Small-sized DC circuit breaker is worked at rated current Ie.Small-sized DC circuit breaker has the inverse time lag to overload current
Characteristic.Anti-time limit characteristic is the relationship between overload current and operating time of protection, and overload current is bigger, and operating time of protection is got over
Short, overload current is smaller, and operating time of protection is longer, and the overload current and operating time of protection of small-sized DC circuit breaker have one
Fixed curved line relation.
The quality and performance of small-sized DC circuit breaker have the inverse time of certain difference or even same model different batches of product
Limit characteristic also has certain difference, and after a period of use, anti-time limit characteristic can create a difference small-sized DC circuit breaker, to prevent
Because small-sized DC circuit breaker expands accident because of anti-time limit characteristic difference failure, it is desirable that every just to be needed using a period of time to small-sized
The anti-time limit characteristic of dc circuit breaker measures.In the prior art, making measurement to the anti-time limit characteristic of small-sized DC circuit breaker is
It is spaced apart tester with direct current and carries out substep test inspection.This anti-time limit characteristic to small-sized DC circuit breaker makees the equipment measured
Complexity, price are higher, troublesome in poeration.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, propose that a kind of equipment is simple, cheap, easy to operate
Small-sized DC circuit breaker anti-time limit characteristic measurement device.
The utility model is realized with the following method.
Small-sized DC circuit breaker anti-time limit characteristic measurement device has working plate, and working plate has power input and detection
Terminals have measurement circuit on working plate, and measurement circuit has power supply circuit, detection circuit and timing circuit, and power supply circuit has
The input terminal of rectifier, rectifier is connected by switch with the power input on working plate, and rectifier has DC output end,
Measurement circuit has dc circuit breaker, and the input terminal of dc circuit breaker is connected with the DC output end of rectifier, and dc circuit breaker is defeated
Rheostat, rheostat ammeter and detection ammeter, rheostat ammeter and detection electricity are sequentially connected between the positive and negative electrode of outlet
The control terminal of DC relay, dc circuit breaker are connected between tie point between flow table and the anode of dc circuit breaker output end
Input terminal and output end respectively with detection terminals be connected, timing circuit has digital timer, the control of digital timer
End processed is connected with the output end of DC relay, the power input phase of the power input and working plate of digital timer
Even.
The utility model can operating current be greater than rated current Ie when serial different multiples Ie under, measure it is small-sized
The corresponding operating time of protection of dc circuit breaker can produce small-sized DC circuit breaker with corresponding Ie and operating time of protection
Anti-time limit characteristic curve, with the anti-time limit characteristic curve comparison of the anti-time limit characteristic curve determined and standard, it is known that small-sized
The deviation of dc circuit breaker anti-time limit characteristic.
Before measurement, first choose measurement when Ie different multiples, such as 0.5,1.0,1.5,2.0,2.5,3.0,
3.5 ..., rheostatic resistance is transferred to resistance maximum.
When measurement, the power input of working plate is connected with power supply, closes dc circuit breaker, standardsizing rheostat allows inspection
The electric current of survey ammeter separates dc circuit breaker, has separated what needs detected in the initial Ie value of the different multiples Ie of selection
Small-sized DC circuit breaker be connected in the detection terminals of working plate, close small-sized DC circuit breaker, then small-sized DC circuit breaker
It works at an overload current Ie of selection, digital timer starts timing, when small-sized DC circuit breaker is jumped because of overload
When opening, DC relay output switching signal, digital timer stops timing, obtains corresponding overload current and protection is dynamic
Make the time, with this same method, a series of available corresponding overload currents and operating time of protection, with a series of phases
Corresponding overload current and operating time of protection can produce the anti-time limit characteristic curve of small-sized DC circuit breaker.
The device structure of the utility model is simple, cheap, easy to operate.
With reference to the accompanying drawing, the utility model is further described.
Detailed description of the invention
Fig. 1 is a kind of small-sized DC circuit breaker anti-time limit characteristic measurement dress that scheme of the invention according to the present utility model proposes
The schematic front view set；
Fig. 2 is the schematic top plan view of Fig. 1；
Fig. 3 is the electronic schematic diagram for measuring circuit.
Specific embodiment
In Fig. 1 ~ Fig. 3, small-sized DC circuit breaker anti-time limit characteristic measurement device has working plate 1, and working plate has power supply
Input terminal 2 and detection terminals 3, there is measurement circuit CD on working plate, measurement circuit have power supply circuit GD, detection circuit JC and
Timing circuit JS, power supply circuit have rectifier 4, and the input terminal of rectifier passes through the power input on switch 5 and working plate
Be connected, rectifier has a DC output end 6, and measurement circuit has a dc circuit breaker 7, the input terminal of dc circuit breaker and rectifier it is straight
It flows output end to be connected, rheostat 8, rheostat ammeter 9 and detection is sequentially connected between the positive and negative electrode of dc circuit breaker output end
Ammeter 10 is connected between rheostat ammeter and the anode for detecting the tie point and dc circuit breaker output end between ammeter
The control terminal of DC relay 11, the input terminal and output end of dc circuit breaker are connected with detection terminals respectively, timing circuit
There is digital timer 12, the control terminal 13 of digital timer is connected with the output end of DC relay, digital timer
Power input 14 be connected with the power input of working plate.
Claims (1)
1. a kind of small-sized DC circuit breaker anti-time limit characteristic measurement device, it is characterised in that:
There is working plate, working plate has power input and detection terminals, has measurement circuit on working plate, measure circuit
There are power supply circuit, detection circuit and timing circuit, power supply circuit has rectifier, and the input terminal of rectifier passes through switch and workbench
Power input on plate is connected, and rectifier has DC output end, and measurement circuit has dc circuit breaker, the input of dc circuit breaker
End is connected with the DC output end of rectifier, and rheostat, rheostat are sequentially connected between the positive and negative electrode of dc circuit breaker output end
Ammeter and detection ammeter, tie point and dc circuit breaker output end between rheostat ammeter and detection ammeter are just
The control terminal of DC relay is connected between pole, the input terminal and output end of dc circuit breaker are connected with detection terminals respectively,
Timing circuit has digital timer, and the control terminal of digital timer is connected with the output end of DC relay, digital meter
When device power input be connected with the power input of working plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821251230.5U CN208443983U (en) | 2018-08-06 | 2018-08-06 | Small-sized DC circuit breaker anti-time limit characteristic measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821251230.5U CN208443983U (en) | 2018-08-06 | 2018-08-06 | Small-sized DC circuit breaker anti-time limit characteristic measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208443983U true CN208443983U (en) | 2019-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821251230.5U Active CN208443983U (en) | 2018-08-06 | 2018-08-06 | Small-sized DC circuit breaker anti-time limit characteristic measurement device |
Country Status (1)
| Country | Link |
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| CN (1) | CN208443983U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114707102A (en) * | 2022-06-06 | 2022-07-05 | 广东鹰视能效科技有限公司 | Test method and system for relay protection device with inverse time limit characteristic |
-
2018
- 2018-08-06 CN CN201821251230.5U patent/CN208443983U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114707102A (en) * | 2022-06-06 | 2022-07-05 | 广东鹰视能效科技有限公司 | Test method and system for relay protection device with inverse time limit characteristic |
| CN114707102B (en) * | 2022-06-06 | 2022-09-09 | 广东鹰视能效科技有限公司 | Test method and system for relay protection device with inverse time limit characteristic |
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