CN106443427A - Time delay characteristic detection test bed for thermal relays - Google Patents
Time delay characteristic detection test bed for thermal relays Download PDFInfo
- Publication number
- CN106443427A CN106443427A CN201610765229.3A CN201610765229A CN106443427A CN 106443427 A CN106443427 A CN 106443427A CN 201610765229 A CN201610765229 A CN 201610765229A CN 106443427 A CN106443427 A CN 106443427A
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- CN
- China
- Prior art keywords
- current
- relays
- tap
- test bed
- time delay
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention relates to a time delay characteristic detection test bed for thermal relays. The test bed comprises a current transformer on an output side of a transformer, an output side of a voltage regulator of the test bed is a primary side, four sequentially adjacent output taps are arranged on a secondary side of the current transformer, the first tap is connected with an input end of a current transmitter, the second tap, the third tap and the fourth tap are relatively connected with ends of normally open contacts of three relays respectively, the other ends of the normally open contacts of the three relays are parallelly connected and then connected to the other end of an input interface of the current transmitter, and an output port of the current transmitter is an output port of a sampling circuit. Owing to the current transmitter with high linearity and accuracy, excellent temperature characteristics and long-term operating stability, the regulating current of the time delay characteristic detection test bed for the thermal relays in test is safe, reliable, rapid and accurate.
Description
Technical field
The invention belongs to a kind of low-voltage electrical apparatus testing stand, more particularly to a kind of thermorelay time-delay characteristics detection test
Platform.
Background technology
Thermorelay time-delay characteristics Detecting data in the prior art, due to sample circuit and industrial computer clock reference
Easily affected by temperature, electromagnetic interference, mechanical vibration etc., sampled data fluctuating margin ratio can be led to larger, through routine processes
There is deviation in value of calculation afterwards and actual value, cause electric current unstable.Experimenter measures such product attribute, manually adjusts
Section pressure regulator measurement product attribute, causes inconvenience, affects efficiency, and long-time heating leads to the change of internal resistance, can shadow
Ring accuracy of detection.
Content of the invention
The present invention provides one kind to adjust electric current in testing and safely may be used for solving technical problem present in known technology
Lean on, fast and accurately thermorelay time-delay characteristics Detecting data.
The present invention is adopted the technical scheme that by solving technical problem present in known technology：It includes described examination
Test the current transformer exporting in the transformator output as former limit with pressure regulator of platform, the two of described current transformer
The adjacent output tap of first, second, third and fourth 4 orders is had on secondary side；First described tap and a current transducer
One end of input connect；Described second and third, four taps respectively relative to connect second and third, the normal opened contact of four relays
One end, described second and third, the other end parallel connection of the normal opened contact of four relays be followed by the another of described current transducer input interface
One end；The delivery outlet of the described current transducer i.e. delivery outlet as sample circuit；One 12 volts of power supply supplies electricity to described electricity
Flow transmitter, described second and third, the control coil of four relays controls by the control relay circuit of described testing stand.
The present invention has the advantages and positive effects that：Due to employing current transducer, and the feature of current transducer：
The linearity is high, accuracy is high, excellent temperature characterisitic and the stability of long-term work.So that the inspection of thermorelay time-delay characteristics
Survey testing stand regulation electric current in testing, safe and reliable, quick and precisely.
Brief description
Fig. 1 is the circuit theory diagrams of the present invention.
Specific embodiment
For present disclosure, feature and effect can be further appreciated that, hereby enumerate following examples, and coordinate accompanying drawing detailed
It is described as follows：
As shown in Figure 1：220V alternating current, as power supply, connects the input of electric voltage regulator T1 through the outfan of chopper J1
Side, pressure regulator T1 outlet side one end be simultaneously connected with one end of normally opened contact of catalyst J2 and catalyst J3 normally opened contact one
End, another termination transformator T2 former limit terminal 1 of catalyst J2 normally opened contact, the other end of catalyst J3 normally opened contact connects change
Depressor T2 former limit terminal 2, transformator T2 former limit terminal 3 connects the zero line of pressure regulator T1；One end of catalyst J6 normally opened contact is even
Connect transformator T2 secondary terminal 4；One end connection transformer T2 secondary terminal 5 of catalyst J5 normally opened contact, catalyst J4 is normally opened
One end connection transformer T2 secondary terminal 6 of contact, the other end of catalyst J4 normally opened contact, catalyst J5 normally opened contact another
One end, the other end of catalyst J6 normally opened contact are connected in parallel, and form a wiring tap 1,5 volts of sides of transformator T2 secondary
Output connects sample circuit.Transformator T2 secondary terminal 7 passes through from the center of Current Transmit via wire and connects catalyst
One end of J7 normally opened contact, Current Transmit output tap 1 connects current transducer B input interface 1, and Current Transmit is defeated
Go out one end that tap 2,3,4 connects relay KA2, KA3, KA4 normally opened contact respectively, relay KA2, KA3, KA4 normally opened contact
The other end be connected in parallel connection current transducer B input interface 2.The effect of current transducer B can will collect
Current signal is processed, the more accurate voltage signal of transmission 0-5V.Delivery outlet ao, a2 of current transducer B will be used as adopting
The delivery outlet on sampling point road.Current Transmit is wound around a fixing turn (changing no-load voltage ratio, increase sample signal strength) with wire
End is connected to one end of catalyst J7 normally-closed contact, and the other end of catalyst J7 normally-closed contact is another with catalyst J7 normally opened contact
One end connects formation wiring tap 2.One 12 volts of power supply supplies electricity to current transducer B.Second and third, the control line of four relays
Circle is controlled by the control relay circuit of described testing stand.
The effect of relay KA2, KA3, KA4 normally opened contact is to be processed the electric current of major loop, through a rated transformation ratio
Change, allow its enter transmitter current value range in 0-20A.The catalyst control section of testing stand, Control portion
Divide, motor is adjusted, LED indicating section all employs original device.
Specific work process is as follows：
1., according to test current size, select to connect relay；
2. by the current value needed for touch screen setting test；
3. enter current stabilization 1 link；
4. whether the error of the actual current value of computer internal monitoring and setting value in the range of precision of steady current ± 1%, such as
Fruit error≤1%, then go to the 5th step；If error >=1%, go to the 3rd step；
5. start timing (inside program, the test period of setting is 60 minutes)；
6. whether monitoring lasting accuracy is more than ± 1%, if precision is more than ± 1%, goes to the 7th step；If precision is less than
± 1%, go to the 8th step；
7. enter current stabilization 2 link, go to the 6th step；
8. whether timing time is more than 60 minutes, if no more than 60 minutes, go to the 6th step；If greater than 60 minutes, turn
To the 9th step；
9. power-off terminates.
Claims (1)
1. a kind of thermorelay time-delay characteristics Detecting data, it include described testing stand with pressure regulator output side as former limit
Transformator export side on current transformer, it is characterized in that：The secondary side of described current transformer has first and second,
3rd, the adjacent output tap of four or four orders；One end phase of first described tap and the input of a current transducer
Connect；Described second and third, four taps respectively relative to connect second and third, one end of the normal opened contact of four relays, described second,
3rd, the other end parallel connection of the normal opened contact of four relays is followed by the other end of described current transducer input interface；Described electric current
The delivery outlet of the transmitter i.e. delivery outlet as sample circuit；One 12 volts of power supply supplies electricity to described current transducer, described
Second and third, the control coil of four relays controls by the control relay circuit of described testing stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610765229.3A CN106443427A (en) | 2016-08-29 | 2016-08-29 | Time delay characteristic detection test bed for thermal relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610765229.3A CN106443427A (en) | 2016-08-29 | 2016-08-29 | Time delay characteristic detection test bed for thermal relays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106443427A true CN106443427A (en) | 2017-02-22 |
Family
ID=58091343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610765229.3A Withdrawn CN106443427A (en) | 2016-08-29 | 2016-08-29 | Time delay characteristic detection test bed for thermal relays |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106443427A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163347A (en) * | 2013-03-13 | 2013-06-19 | 绍兴电力局 | Adjustable current transducer with high accuracy |
| CN105334457A (en) * | 2015-11-12 | 2016-02-17 | 天津市百利电气有限公司 | Testing apparatus of low-voltage multifunctional characteristic detection and control method |
-
2016
- 2016-08-29 CN CN201610765229.3A patent/CN106443427A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163347A (en) * | 2013-03-13 | 2013-06-19 | 绍兴电力局 | Adjustable current transducer with high accuracy |
| CN105334457A (en) * | 2015-11-12 | 2016-02-17 | 天津市百利电气有限公司 | Testing apparatus of low-voltage multifunctional characteristic detection and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170222 |
|
| WW01 | Invention patent application withdrawn after publication |