CN107479017A - A kind of intermediate frequency low-voltage high-current test device - Google Patents
A kind of intermediate frequency low-voltage high-current test device Download PDFInfo
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- CN107479017A CN107479017A CN201710898396.XA CN201710898396A CN107479017A CN 107479017 A CN107479017 A CN 107479017A CN 201710898396 A CN201710898396 A CN 201710898396A CN 107479017 A CN107479017 A CN 107479017A
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- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ac-Ac Conversion (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention relates to a kind of intermediate frequency low-voltage high-current test device, including auto-transformer, step-down transformer, current transformer, 100A contacts of contactor, load resistance, band switch, contactor coil, 115V400Hz intermediate frequency power supplies are exported to step-down transformer by auto-transformer, step-down transformer exports 4V low-tension supplies, and by band switch selection connection, wherein load resistance produces 83.5A400Hz test electric currents all the way, for detecting current transformer.Instant invention overcomes old exerciser to consume energy the shortcomings that too big, reduces noise during intermediate frequency power supply work, reduces cost, simplify structure, easily fabricated, fault rate is low, and securely and reliably, energy-conserving and environment-protective are easy to operation.
Description
Technical field
The present invention relates to current testing device technical field, specifically a kind of intermediate frequency low-voltage high-current test device.
Background technology
The rated operational current of current transformer is 83.5A (frequency 400Hz), the Current Mutual Inductance that former production scene uses
Device exerciser, it is the electric current that 83.5A is directly produced using 115V intermediate frequency power supplies (frequency 400Hz), the capacity of intermediate frequency power supply is 10
Kilovolt-ampere, and power consumption is too big during use, and the noise of intermediate frequency power supply is also very big.According to step-down transformer by intermediate frequency power supply 115V
30 to 50 volts are dropped to, produces 83.5A electric current, then the capacity of step-down transformer needs three to five kilovolt-amperes, and the decompression becomes
Depressor is also very heavy, and power consumption is also larger.Need to manufacture a kind of intermediate frequency low-voltage high-current test device and meet production test demand.
The content of the invention
The technical problems to be solved by the invention are to propose a kind of intermediate frequency low-voltage high-current test device, meet that electric current is mutual
The small size of sensor test, economy, low noise, portable demand.
The technical problems to be solved by the invention are realized using following technical scheme：
A kind of intermediate frequency low-voltage high-current test device, including first switch, auto-transformer, step-down transformer, electric current are mutual
Sensor, the first contact, the second contact, the 3rd contact, the first load resistance, the second load resistance, the 3rd load resistance, second open
Pass, the 3rd switch, first coil, the second coil, tertiary coil；
The first switch connects the auto-transformer primary side control input power switch, the auto-transformer
Secondary side connects the primary side of the step-down transformer；
One end of the step-down transformer secondary side connects the current transformer, the step-down transformer secondary side it is another
One end connects one end of first load resistance, the second load resistance and the 3rd load resistance；
First load resistance, the second load resistance, the 3rd load resistance be connected respectively in first contact,
Second contact, the 3rd contact, first contact, the second contact, one end on the 3rd contact away from load resistance and the electricity
One end away from the step-down transformer is connected on the primary side of current transformer；
The second switch is connected with 24V Switching Power Supply control input power switches, the positive pole string of the 24V Switching Power Supplies
It is connected to the energization that the 3rd switch controls the first coil, the second coil, tertiary coil.
The intermediate frequency power supply of the auto-transformer input 115V400Hz, export 0-130V variable voltage.
The primary side second siding ring turn ratio of the step-down transformer is 115:4.
The rated current no-load voltage ratio of the current transformer is 100/5.
First load resistance, the second load resistance, the 3rd load resistance use special thick brass bar.
First contact, the second contact, the 3rd contact are 100A contactor normally opened contacts, first contact, second
Contact, the 3rd contact correspondingly control break-make by the first coil, the second coil, tertiary coil.
3rd switch uses band switch.
The beneficial effects of the invention are as follows：Instant invention overcomes old exerciser to consume energy the shortcomings that too big, reduces medium frequency electric
Noise when source works, reduces cost, simplifies structure, easily fabricated, fault rate is low, securely and reliably, energy-conserving and environment-protective, is easy to
Operation.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the circuit diagram of the present invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, below it is right
The present invention is expanded on further.
A kind of rated current of current transformer is 83.5A, and supply frequency 400Hz, rated current no-load voltage ratio is 100/5,
A kind of current testing device is needed to test the current transformer, current testing device output 83.5A electric currents, frequency 400Hz.With
The current transformer exerciser of preceding production onsite application, is directly to produce 83.5A using 115V intermediate frequency power supplies (frequency 400Hz)
Electric current, the capacity of intermediate frequency power supply is 10 kilovolt-amperes, and power consumption is too big during use, and the noise of intermediate frequency power supply is also very big.According to
Intermediate frequency power supply 115V is dropped to 30 to 50 volts by step-down transformer, produces 83.5A electric current, then the capacity of step-down transformer needs
Three to five kilovolt-amperes are wanted, the step-down transformer is also very heavy, and power consumption is also larger.By theoretical calculation and actual measuring and calculating, will can drop
The output of pressure transformer is set as 4V.Intermediate frequency power supply 115V is now dropped to by 4V using step-down transformer, then the appearance of step-down transformer
As long as 0.5 kilovolt-ampere of amount, very economical, the volume of equipment is also smaller, easy to operate.
As shown in figure 1, a kind of intermediate frequency low-voltage high-current test device, including first switch K1, auto-transformer B1, decompression
It is transformer B2, current transformer B3, the first contact KA, the second contact KB, the 3rd contact KC, the first load resistance RA, second negative
Carry resistance RB, the 3rd load resistance RC, second switch K2, the 3rd switch K3, first coil C1, the second coil C2, tertiary coil
C3。
The first switch K1 connections auto-transformer B1 primary sides control input power switch, input power are
115V400Hz intermediate frequency power supply, auto-transformer B1 secondary side connection step-down transformer B2 primary side output 115V400Hz
Intermediate frequency power supply, one end of the secondary side of the step-down transformer B2 connects the low of the current transformer B3 outputs 4V400Hz
Voltage source, the other end connects the first load resistance RA, the second load resistance RB, the 3rd load resistance RC one end, described
First load resistance RA, the second load resistance RB, the 3rd load resistance RC are corresponded to and the first contact KA, the second contact respectively
KB, the 3rd contact KC are connected, the first contact KA, the second contact KB, one end on the 3rd contact KC away from load resistance with
One end away from the step-down transformer B2 is connected on the primary side of the current transformer B3, and the second switch K2 is connected with
The break-make of 24V Switching Power Supply control input power supplys, the input power are 220V50Hz power supplys, and the 24V Switching Power Supplies are just
Pole connection the 3rd switch K3 common port, the 3rd switch K3 use band switch, and the described 3rd switchs other of K3
Three ends connect the first coil C1, the second coil C2, tertiary coil C3, the first coil C1, the second coil C2, respectively
Three-winding C3 correspondingly controls the first contact KA, the second contact KB, the 3rd contact KC adhesive.
Three 100A contactors are controlled with band switch, can only once have a contactor job, 83.5A can only be produced.
Such as three 100A contactors are controlled using three one-way switches, it is possible to two or three switch controls are connected, so that two
Or three 100A contactor adhesives, and then make two or three load resistance parallel connections, two or three load resistance parallel connections just make
Obtain actual load resistance and become original half or 1/3rd, the 83.5A of two times or three times will be produced, pole has
Auto-transformer and 4V stationary transformers may be caused to damage, current transformer and ammeter may be made to overload.
Auto-transformer B1 input is 115V, and output is 0-130V.The exerciser produce 83.5A high currents process be
Output voltage is first adjusted by automatic coupling voltage regulator, the output voltage is added to fixed step-down transformer input, auto-transformer B1's
When output voltage is 115V, the output of fixed step-down transformer is 4V, exports and is added to for 4V or so voltage on load resistance, is born
It is special thick brass bar to carry resistance, and by adjusting auto-transformer B1 output, trace regulation fixes step-down transformer B2's
Output voltage values (4V or so), and then produce 83.5A high current.The testing requirements of current transformer can be met.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, that described in above-described embodiment and specification is the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these change and
Improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
Thing defines.
Claims (7)
- A kind of 1. intermediate frequency low-voltage high-current test device, it is characterised in that：Including first switch (K1), auto-transformer (B1), Step-down transformer (B2), current transformer (B3), the first contact (KA), the second contact (KB), the 3rd contact (KC), the first load Resistance (RA), the second load resistance (RB), the 3rd load resistance (RC), second switch (K2), the 3rd switch (K3), first coil (C1), the second coil (C2), tertiary coil (C3), the first switch (K1) connect auto-transformer (B1) the primary side control Input power switch processed, the secondary side of the auto-transformer (B1) connect the primary side of the step-down transformer (B2)；One end of the secondary side of the step-down transformer (B2) connects the current transformer (B3), the step-down transformer (B2) The other end of secondary side connect first load resistance (RA), the second load resistance (RB), the 3rd load resistance (RC) One end；First load resistance (RA), the second load resistance (RB), the 3rd load resistance (RC) are connected respectively in described First contact (KA), the second contact (KB), the 3rd contact (KC), first contact (KA), the second contact (KB), the 3rd contact (KC) one end on away from load resistance and the remote step-down transformer (B2) on the primary side of the current transformer (B3) One end be connected；The second switch (K2) is connected with 24V Switching Power Supply control input power switches, the positive pole string of the 24V Switching Power Supplies It is connected to the energization that the 3rd switch (K3) controls the first coil (C1), the second coil (C2), tertiary coil (C3).
- A kind of 2. intermediate frequency low-voltage high-current test device according to claim 1, it is characterised in that：The auto-transformer (B1) 115V400Hz intermediate frequency power supply is exported, exports 0-130V variable voltage.
- A kind of 3. intermediate frequency low-voltage and high-current tester according to claim 1, it is characterised in that：The step-down transformer (B2) primary side second siding ring turn ratio is 115:4, the step-down transformer exports 4V voltages.
- A kind of 4. intermediate frequency low-voltage high-current test device according to claim 1, it is characterised in that：The current transformer (B3) rated current no-load voltage ratio is 100:5.
- A kind of 5. intermediate frequency low-voltage high-current test device according to claim 1, it is characterised in that：The first load electricity (RA), the second load resistance (RB), the 3rd load resistance (RC) are hindered using special thick brass bar.
- A kind of 6. intermediate frequency low-voltage high-current test device according to claim 1, it is characterised in that：First contact (KA), the second contact (KB), the 3rd contact (KC) are 100A contactor normally opened contacts, first contact (KA), the second contact (KB), the 3rd contact (KC) is corresponding controls break-make by the first coil (C1), the second coil (C2), tertiary coil (C3).
- A kind of 7. intermediate frequency low-voltage high-current test device according to claim 1, it is characterised in that：3rd switch (K3) band switch is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898396.XA CN107479017B (en) | 2017-09-28 | 2017-09-28 | Medium-frequency low-voltage high-current tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898396.XA CN107479017B (en) | 2017-09-28 | 2017-09-28 | Medium-frequency low-voltage high-current tester |
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| Publication Number | Publication Date |
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| CN107479017A true CN107479017A (en) | 2017-12-15 |
| CN107479017B CN107479017B (en) | 2023-10-24 |
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| CN201710898396.XA Active CN107479017B (en) | 2017-09-28 | 2017-09-28 | Medium-frequency low-voltage high-current tester |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044479A (en) * | 2015-01-30 | 2015-11-11 | 国网河南省电力公司电力科学研究院 | Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method |
| CN205017222U (en) * | 2015-09-18 | 2016-02-03 | 深圳Tcl新技术有限公司 | Switching power supply and electronic equipment |
| WO2016201968A1 (en) * | 2015-06-16 | 2016-12-22 | 江苏现代电力科技股份有限公司 | Low-voltage power distribution voltage-regulating device |
| CN106740221A (en) * | 2017-01-06 | 2017-05-31 | 中国计量大学 | A kind of V2G radio energy two-way transmission apparatus based on low frequency PWM rectifier |
| CN207318697U (en) * | 2017-09-28 | 2018-05-04 | 国营芜湖机械厂 | A kind of intermediate frequency low-voltage high-current test device |
-
2017
- 2017-09-28 CN CN201710898396.XA patent/CN107479017B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044479A (en) * | 2015-01-30 | 2015-11-11 | 国网河南省电力公司电力科学研究院 | Apparatus for large-scale oil-immersed transformer no-load and on-load comprehensive tests and method |
| WO2016201968A1 (en) * | 2015-06-16 | 2016-12-22 | 江苏现代电力科技股份有限公司 | Low-voltage power distribution voltage-regulating device |
| CN205017222U (en) * | 2015-09-18 | 2016-02-03 | 深圳Tcl新技术有限公司 | Switching power supply and electronic equipment |
| CN106740221A (en) * | 2017-01-06 | 2017-05-31 | 中国计量大学 | A kind of V2G radio energy two-way transmission apparatus based on low frequency PWM rectifier |
| CN207318697U (en) * | 2017-09-28 | 2018-05-04 | 国营芜湖机械厂 | A kind of intermediate frequency low-voltage high-current test device |
Non-Patent Citations (1)
| Title |
|---|
| 金良盛;郑于海;: "大电流恒流源***的设计与实现" * |
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| CN107479017B (en) | 2023-10-24 |
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