CN207067379U - The non-critical point high-precision measuring load device of vertical cut formula under trystate - Google Patents
The non-critical point high-precision measuring load device of vertical cut formula under trystate Download PDFInfo
- Publication number
- CN207067379U CN207067379U CN201720584901.9U CN201720584901U CN207067379U CN 207067379 U CN207067379 U CN 207067379U CN 201720584901 U CN201720584901 U CN 201720584901U CN 207067379 U CN207067379 U CN 207067379U
- Authority
- CN
- China
- Prior art keywords
- resistance
- line
- switch
- contact
- trystate
- Prior art date
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 230000006378 damage Effects 0.000 abstract description 4
- 208000033999 Device damage Diseases 0.000 abstract description 2
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a kind of non-critical point high-precision measuring load device of vertical cut formula under trystate, including test circuit cabinet and setting in the chassis, it is characterized in that the test circuit includes three groups of loads Z1, Z2, Z3 and four switch S1, S2, S3, S4, input line L1, output line L2 and two resistance R1, R2；Z1, R1, Z2, R2, Z3 are sequentially connected in series between the input line L1, output line L2.Advantage：Prevent because misoperation causes the device damage and personal injury that non-energy metering device second open circuit brings.Moreover, the load device can switch secondary load under non-energy metering device experiment state, test period is saved, reduces experiment work amount, reduced the time that non-energy metering device works by experiment, reduce empirical risk.The metering device considers line resistance, improves the degree of accuracy of device.
Description
Technical field
A kind of non-critical point high-precision measuring load device of vertical cut formula under trystate is the utility model is related to, for non-pass
Mouth metering device error testing, belongs to non-energy metering device to test technical field.
Background technology
Non- energy metering device error information in the case of band different loads differs, and basic linear change, is true
Non- energy metering device error information in the case of different loads is protected in error limit, to carry out to non-energy metering device
Need to carry out under its band rated load and lower limit condition during error checking.JJG1021-2007《Electric power mutual-inductor》Calibrating rule
Journey, JJG313-2010《Verification of Measuring Current Transformer》Vertification regulation has regulation, therefore is measured in non-energy metering directional error
When, it is necessary to be tested non-energy metering device secondary winding access load, generally realized with Burden box, Burden box needs when in use
To use two grades of lower limited load shelves and rated load shelves.
Traditional Burden box, when internal structure reason is in switchable load gear can caused by metering device secondary circuit open a way,
So it can not directly switch its Burden box load value under metering device test mode, it is necessary to will be cut again after primary current back to zero
Change, the situation that primary circuit has electric current secondary loop to open a way otherwise occurs in metering device, it is possible to create high voltage damage electricity
Current transformer or testing equipment, or even threaten personal safety.
The content of the invention
Technical problem to be solved in the utility model is the defects of overcoming prior art, there is provided straight under a kind of trystate
The non-critical point high-precision measuring load device of cut, the device all correspond to a load value under free position, will not operated
During there is the state for disconnecting non-energy metering device secondary load to produce, it is therefore prevented that because misoperation causes non-energy metering to fill
Put device damage and the personal injury that second open circuit is brought.Moreover, the load device can be in non-energy metering device experiment shape
Switch secondary load under state, save test period, reduce experiment work amount, reduce non-energy metering device because of experiment and
The time of work, reduce empirical risk.The metering device considers line resistance, improves the degree of accuracy of device.
In order to solve the above technical problems, the utility model provides the non-critical point high-precision measuring of vertical cut formula under a kind of trystate
With load device, including cabinet and test circuit in the chassis is set, it is characterized in that, the test circuit includes three groups of loads
Z1, Z2, Z3 and four switch S1, S2, S3, S4, input line L1, output line L2 and two resistance R1, R2；The input line
Z1, R1, Z2, R2, Z3 are sequentially connected in series between L1, output line L2；
S1 uses double-pole single throw in described switch S1, S2, S3, S4, and S2, S3, S4 use single-pole single-throw switch (SPST)；
Switch S1 including the first blade both ends the first contact, the second contact and the second blade both ends the 3rd contact,
4th contact, wherein the first contact is connected with input line L1, the second contact and switch S2 one end contact portion, the 3rd contact connect
Connect R1 and Z2 tie point, the 4th contact and the tie point that Z1 and R1 are connected after the second contact portion；
Switch one end contact portion of S2 another terminal contacts and switch S4；
Switch S3 one end contact portion R2 and Z3 tie point, the other end contact portion of S3 another terminal contacts and S2
Z2 and R2 tie point is reconnected afterwards；
Switch S4 another terminal contacts are connected with output line L2.
Further, the component connecting line in the test circuit is in parallel using multiply, reduces contact resistance.
Further, load described in every group includes the resistance and inductance of series connection.
Further, described resistance R1, R2 resistance are equal.
Further, described resistance R1, R2 resistance are the line resistance sum b of input line and output line.
Further, the line resistance of three groups of load Z1, Z2, Z3, input line and output line and two resistance R1, R2
Three kinds of output loads Z1+b, Z2+b, Z3+b are constituted, three kinds of output loads are in enter formula relation again.
The beneficial effect that the utility model is reached：
Conventional load device realizes 8 kinds of different loads, trystate of the present utility model by 8 groups of inductance, resistance and switch
The lower non-critical point high-precision measuring of vertical cut formula is with load device only with 3 groups of resistance, inductance and 4 switches, and component is less, using negative
The mode of lotus superposition, the utilization rate of single load is improved, substantially reduces component number, saves material cost；
During conventional load device is by a load gear switch to another load gear, current capacity case is in disconnected
Line state so that the open circuit of metering device secondary circuit, such as operated in the case of powered, most probably produce high voltage damage metering dress
Put or other testing equipments, or even threaten personal safety；The utility model load device, any switch are opened or closed,
Load device will not have the state for disconnecting metering device secondary load to produce in operation all without there is off state,
Can under metering device trystate switchable load, save test period, reduce experiment work amount, shorten metering device
The time to be worked by experiment, reduce empirical risk；
There is line loss in the input line and output line of load device, and the value of line loss is larger, such as using the side of load superposition
Formula design (calculated) load device, and as shown in figure 1, as do not considered line loss, the load of L1 ', L2 ' both ends output for Z1 '+b ', Z2 '+
B ', Z3 '+b ', Z1 '+Z2 '+b ', Z1 '+Z3 '+b ', Z2 '+Z3 '+b ', Z1 '+Z2 '+Z3 '+b ', do not form overlaying relation,
The degree of accuracy of load device is have impact on, the utility model device has taken into full account input line and the line loss of output line, such as Fig. 2 institutes
Show, two resistance equivalent with line loss sealed among Z1, Z2, Z3, by the foldings of 4 switches ensure that every group of load with
And the accuracy of the impedance value after load superposition.
Brief description of the drawings
Fig. 1 is the load device based on load principle of stacking（Do not consider that line hinders）Schematic diagram；
Fig. 2 is the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating this
The technical scheme of utility model, and the scope of protection of the utility model can not be limited with this.
As shown in Fig. 2 the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate, including cabinet and set
Put test circuit in the chassis, it is characterized in that, the test circuit include three groups of loads Z1, Z2, Z3 and four switch S1,
S2, S3, S4, input line L1, output line L2 and two resistance R1, R2；It is sequentially connected in series between the input line L1, output line L2
Z1、R1、Z2、R2、Z3；
S1 uses double-pole single throw in described switch S1, S2, S3, S4, and S2, S3, S4 use single-pole single-throw switch (SPST)；
Switch the 3rd contact at first contacts 1 of the S1 including the first blade both ends, the second contact 3 and the second blade both ends
2nd, the 4th contact 4, wherein the first contact 1 is connected with input line L1, the second contact 3 is connected with switching a S2 terminal contacts 5, and the 3rd
Contact 2 connects R1 and Z2 tie point 12, and the 4th contact 4 connects Z1 and R1 tie point 11 after being connected with the second contact 3；
Another terminal contacts 6 for switching S2 are connected with switching a S4 terminal contacts 9；
Switch a S3 terminal contacts 7 connection R2 and Z3 tie point 14, S3 another terminal contacts 8 and S2 another terminal contacts
Z2 and R2 tie point 13 is reconnected after 6 connections；
Switch S4 another terminal contacts 10 are connected with output line L2.
In the present embodiment, the component connecting line in the test circuit is in parallel using multiply, reduces contact resistance.
In the present embodiment, load described in every group includes the resistance and inductance of series connection.
In the present embodiment, described resistance R1, R2 resistance are equal.
In the present embodiment, described resistance R1, R2 resistance hinder sum b for the line of input line and output line.
In the present embodiment, three groups of load Z1, Z2, Z3, the line resistance of input line and output line and two resistance R1,
R2 constitutes three kinds of output loads Z1+b, Z2+b, Z3+b, and three kinds of output loads are in enter formula relation again.
Illustrate the implementation of load：
（1）When S1, S2, S3, S4 are all closed, Z1, R1, Z2, R2, Z3 are short-circuited, load value bVA.
（2）S1 is disconnected, and when S2, S3, S4 are closed, R1, Z2, R2, Z3 are short-circuited, and load value is Z1+b=2.5VA.
（3）S2 is disconnected, and when S1, S3, S4 are closed, Z1, R1, R2, Z3 are short-circuited, and load value is Z2+b=5VA.
（4）S1, S2 are disconnected, and when S3, S4 are closed, R2, Z3 are short-circuited, and load value is Z1+R1+Z2+b=7.5VA.
（5）S4 is disconnected, and when S1, S2, S3 are closed, Z1, R1, Z2, R2 are short-circuited, and load value is Z3+b=10VA.
（6）S1, S3, S4 are disconnected, and when S2 is closed, R1, Z2 are short-circuited, and load value is Z1+R2+Z3+b=12.5VA.
（7）S2, S3, S4 are disconnected, and when S1 is closed, Z1, R1 are short-circuited, and load value is Z2+R2+Z3+b=15VA.
（8）When S1, S2, S3, S4 are all off, load value is Z1+R1+Z2+R2+Z3+b=17.5VA.
By controlling 4 switches, achievable b-17.5VA has 8 kinds of different loads altogether.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and deformation can also be made, these change
Enter and deform and also should be regarded as the scope of protection of the utility model.
Claims (6)
1. the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate, including cabinet and set in the chassis
Test circuit, it is characterized in that, the test circuit includes three groups of loads Z1, Z2, Z3 and four switch S1, S2, S3, S4, inputs
Line L1, output line L2 and two resistance R1, R2；Be sequentially connected in series between the input line L1, output line L2 Z1, R1, Z2, R2,
Z3；
S1 uses double-pole single throw in described switch S1, S2, S3, S4, and S2, S3, S4 use single-pole single-throw switch (SPST)；
Switching S1 includes first contact at the first blade both ends, the 3rd contact of the second contact and the second blade both ends, the 4th
Contact, wherein the first contact is connected with input line L1, the second contact and switch S2 one end contact portion, the 3rd contact portion R1
With Z2 tie point, the 4th contact and the tie point that Z1 and R1 are connected after the second contact portion；
Switch one end contact portion of S2 another terminal contacts and switch S4；
S3 one end contact portion R2 and Z3 tie point are switched, after the other end contact portion of S3 another terminal contacts and S2 again
Connect Z2 and R2 tie point；
Switch S4 another terminal contacts are connected with output line L2.
2. the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate according to claim 1, it is special
Sign is that the component connecting line in the test circuit is in parallel using multiply, reduces contact resistance.
3. the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate according to claim 1, it is special
Sign is that load described in every group includes the resistance and inductance of series connection.
4. the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate according to claim 1, it is special
Sign is that described resistance R1, R2 resistance are equal.
5. the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate according to claim 4, it is special
Sign is that described resistance R1, R2 resistance hinder sum b for the line of input line and output line.
6. the non-critical point high-precision measuring load device of vertical cut formula under a kind of trystate according to claim 5, it is special
Sign is, three groups of load Z1, Z2, Z3, input line and the line resistance of output line and two resistance R1, R2 constitute three kinds it is defeated
Go out load Z1+b, Z2+b, Z3+b, three kinds of output loads are in enter formula relation again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720584901.9U CN207067379U (en) | 2017-05-24 | 2017-05-24 | The non-critical point high-precision measuring load device of vertical cut formula under trystate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720584901.9U CN207067379U (en) | 2017-05-24 | 2017-05-24 | The non-critical point high-precision measuring load device of vertical cut formula under trystate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207067379U true CN207067379U (en) | 2018-03-02 |
Family
ID=61505983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720584901.9U Active CN207067379U (en) | 2017-05-24 | 2017-05-24 | The non-critical point high-precision measuring load device of vertical cut formula under trystate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207067379U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997036A (en) * | 2017-05-24 | 2017-08-01 | 国家电网公司 | The non-critical point high-precision measuring load device of vertical cut formula under trystate |
-
2017
- 2017-05-24 CN CN201720584901.9U patent/CN207067379U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106997036A (en) * | 2017-05-24 | 2017-08-01 | 国家电网公司 | The non-critical point high-precision measuring load device of vertical cut formula under trystate |
| CN106997036B (en) * | 2017-05-24 | 2023-09-22 | 国家电网公司 | Load device for direct-cutting non-gateway high-precision metering under test state |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI230491B (en) | Control system for canceling load unbalance of three-phase circuit | |
| CN204556692U (en) | Multiple way electric metering junction box | |
| CN111596218B (en) | Device for simulating charge-discharge characteristics of lead-acid battery pack by using lithium battery pack | |
| CN207067379U (en) | The non-critical point high-precision measuring load device of vertical cut formula under trystate | |
| CN2932394Y (en) | Metering device with a wide current measuring range | |
| CN206074794U (en) | The portable power storage load box checked by false wiring of electric energy metering equipment | |
| CN2907083Y (en) | Soft starter for high power industrial frequency transformer | |
| CN106997036A (en) | The non-critical point high-precision measuring load device of vertical cut formula under trystate | |
| CN107769664B (en) | Driver with adjustable zero point type isolation transformer | |
| CN207036982U (en) | A kind of automatic throw-in equipment of emergency power supply mimic-disconnecting switch | |
| CN206057386U (en) | Extra-high voltage regulating compensation no-load transformer and short-circuit test connecting wire switching device | |
| CN109782211A (en) | A kind of transformer secondary circuit fault simulation platform | |
| CN206209397U (en) | A kind of mimic-disconnecting switch with anti-bouncing function | |
| CN210954258U (en) | High-power direct current relay transient impulse current testing device | |
| CN205562783U (en) | Open circuit current load case is prevented to serial -type | |
| CN203826784U (en) | Low-voltage power distribution device | |
| CN209232242U (en) | Modularization distribution line physical simulation experiment device | |
| CN105738852A (en) | Tandem type open circuit-preventing current burden box | |
| CN202888853U (en) | Intelligent electrical load unbalance compensation device | |
| CN207882372U (en) | Comprehensive protector of motor tester | |
| CN201113393Y (en) | Current mutual inductor quadric open circuit protector | |
| CN206773117U (en) | Line-selected earthing device | |
| CN206908520U (en) | A kind of on-load voltage regulating switch | |
| CN108695972A (en) | Electrical changing station controls switching circuit, system, method and the controller and medium of power supply | |
| CN210724191U (en) | Leakage open-phase protection circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |