CN202471947U - General electrodeless automatic adjustment current transformer secondary load box - Google Patents
General electrodeless automatic adjustment current transformer secondary load box Download PDFInfo
- Publication number
- CN202471947U CN202471947U CN2012200901606U CN201220090160U CN202471947U CN 202471947 U CN202471947 U CN 202471947U CN 2012200901606 U CN2012200901606 U CN 2012200901606U CN 201220090160 U CN201220090160 U CN 201220090160U CN 202471947 U CN202471947 U CN 202471947U
- Authority
- CN
- China
- Prior art keywords
- current transformer
- parallel
- secondary load
- resistance
- impedance
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000012795 verification Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Abstract
The utility model discloses a general electrodeless automatic adjustment current transformer secondary load box, which consists of impedances from Z1 to Z15 of which cosphi is equal to 0.8, resistors from R1 to R15 of which cosphi is equal to 1.0, relays from JZ1 to JZ15 and relays from JR1 to JR15, wherein the impedances from Z1 to Z15 and the relays from JZ1 to JZ15 are sequentially connected in parallel to form a parallel impedance network; the resistors from R1 to R15 and the relays JR1 to JR15 are sequentially connected in parallel to form a parallel resistor network; and the parallel impedance network is connected in series with the parallel resistor network. The secondary load box automatically adjusts the current transformer secondary load electrodelessly within a full measurement range through the parallel resistor network and the parallel impedance network; the technical requirement for current transformer inspection on the secondary load can be met; the size of the load box is greatly reduced; the generality of the load box is improved; and the manufacturing cost of the load box is reduced. The general electrodeless automatic adjustment current transformer secondary load box is applicable to the technical field of current transformer inspection.
Description
Technical field
The utility model relates to a kind of general stepless automatic adjusting current transformer secondary load case, belongs to electric-power metering current transformer detection technique field.
Background technology
GB1208-2006 " current transformer " regulation:
The standard value of rated secondary current is 1,2 and 5A;
2.5,5,10,15,20,25,30,40,50,60,80,100VA the standard value of specified output is:.
JJG313-2010 " Verification of Measuring Current Transformer vertification regulation " regulation:
The fundamental error of Verification of Measuring Current Transformer; 0 ℃～40 ℃ of environment temperatures; Relative humidity is not more than 80%; When environment electromagnetics interference and mechanical vibration can be ignored, when Verification of Measuring Current Transformer was the arbitrary numerical value between the specified secondary load 25%～100% at rated frequency, rated power factor and secondary load, the error of each class of accuracy must not surpass the limit value of table 1.
Among " State Grid Corporation of China's project of transmitting and converting electricity universal design " (10kV～220 kV electric power meter fascicles), current transformer secondary load is had following regulation: the current transformer rated secondary current has 1A and two kinds of specifications of 5A; The specified secondary load of current transformer should be not more than 10VA, preferentially selects 2.5,5,7.5 for use, specification such as 10VA, in particular cases also can select bigger ratings specifications such as (as 15,20,25,30,40) 50VA for use.
By above-mentioned requirements following impedance (seeing table 1) is arranged.
Table 1
Visible by table 1; Specified outputting standard value impedance 0.1 Ω～100 Ω have 40 grades; And conventional current mutual inductor secondary load case adopts the output of standard value impedance series system as shown in Figure 2; Owing to limited by volume, rotary switch gear, can only take so just to lack versatility by rated secondary current classification design secondary load case.
Adopt conventional current mutual inductor secondary load case can't realize that the stepless gamut of secondary regulates load automatically.Develop a kind of general stepless automatic adjusting current transformer secondary load case, to changing above-mentioned situation, significant.
Summary of the invention
The purpose of the utility model is, can't realize the problem that the stepless gamut of secondary is regulated load automatically in order to solve present employing conventional current mutual inductor secondary load case, and the utility model discloses a kind of general stepless automatic adjusting current transformer secondary load case.
The technical scheme of the utility model is that the general stepless automatic adjusting current transformer secondary load case of the utility model is by the impedance Z of cos φ=0.8
1～Z
15, cos φ=1.0 resistance R
1～R
15, relay J
Z1～J
Z15And relay J
R1～J
R15Form; Said impedance Z
1～Z
15With relay J
Z1～J
Z15Parallel connection constitutes the parallel impedance network successively; Said resistance R
1～R
15With relay J
R1～J
R15Parallel connection constitutes the parallel resistance network successively, and said parallel impedance network is connected with said parallel resistance network.
Said impedance Z
1～Z
15Resistance value be respectively 0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω; Said resistance R
1～R
15Resistance value be respectively 0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω.
Impedance Z by cos φ=0.8
1～Z
15And relay J
Z1～J
Z15Constitute the parallel impedance network, have 2
15Plant array mode, the impedance that can accurately export 0.1 Ω～200 Ω; Resistance R by cos φ=1.0
1～R
15And relay J
R1～J
R15Form the parallel resistance network, have 2
15Plant array mode, can accurately export the resistance of 0.1 Ω～200 Ω.Above-mentioned parallel impedance network connected with the parallel resistance network can satisfy the requirement of rules the current transformer secondary load class of accuracy.
The impedance Z of cos φ=0.8
1～Z
15Impedance and the resistance R of admittance value and cos φ=1.0
1～R
15Resistance and electric conductivity value as shown in table 2.
Table 2
| Symbol | Impedance (Ω) | Admittance (S) | Symbol | Resistance (Ω) | Electricity is led (S) |
| Z1 | 0.2 | 5 | R1 | 0.2 | 5 |
| Z2 | 0.4 | 2.5 | R2 | 0.4 | 2.5 |
| Z3 | 0.8 | 1.25 | R3 | 0.8 | 1.25 |
| Z4 | 1.6 | 0.625 | R4 | 1.6 | 0.625 |
| Z5 | 3.2 | 0.3125 | R5 | 3.2 | 0.3125 |
| Z6 | 6.4 | 0.15625 | R6 | 6.4 | 0.15625 |
| Z7 | 12.8 | 0.078125 | R7 | 12.8 | 0.078125 |
| Z8 | 25.6 | 0.0390625 | R8 | 25.6 | 0.0390625 |
| Z9 | 51.2 | 0.01953125 | R9 | 51.2 | 0.01953125 |
| Z10 | 102.4 | 0.009765625 | R10 | 102.4 | 0.009765625 |
| Z11 | 204.8 | 0.00488281250 | R11 | 204.8 | 0.00488281250 |
| Z12 | 409.6 | 0.00244140625 | R12 | 409.6 | 0.00244140625 |
| Z13 | 819.2 | 0.00122070313 | R13 | 819.2 | 0.00122070313 |
| Z14 | 1638.4 | 0.00061035156 | R14 | 1638.4 | 0.00061035156 |
| Z15 | 3276.8 | 0.00030517578 | R15 | 3276.8 | 0.00030517578 |
The versatility of considering the utility model with load impedance meritorious with the idle component relative error all≤± 3%, can satisfy the related request of JJG1021-2007 " electric power mutual-inductor vertification regulation " and JJG313-2010 " Verification of Measuring Current Transformer vertification regulation ".
The implementation method of general stepless automatic adjusting current transformer secondary load case is following:
(1) material is prepared:
Can accurately export the parallel impedance network (3 grades) of cos φ=0.8,0.1 Ω～200 Ω; Can accurately export the parallel resistance network (3 grades) of cos φ=1.0,0.1 Ω～200 Ω; The relay J of rated current＞6A
K1, J
K2, J
Z1～J
Z15, J
R1～J
R15
(2) mode of connection
As shown in Figure 1, with the impedance Z of cos φ=0.8
1～Z
15(0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω) and relay J
Z1～J
Z15Be in turn connected into the parallel impedance network; Resistance R with cos φ=1.0
1～R
15(0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω) and relay J
R1～J
R15Be in turn connected into the parallel resistance network; The parallel impedance network is connected with the parallel resistance network.
(3) the impedance way of output:
Contact J
K2Closed, J
K1Open circuit; Select J according to calculating
Z1～J
Z15In corresponding junction closure can accurately export impedance 0.1 Ω～200 Ω of cos φ=0.8.
For example:
When needing output impedance to be 0.1 Ω, select closed J
Z1～J
Z15All contacts, then:
=9.9997?S
Z=0.1Ω
When needing output impedance to be 200 Ω, select closed J
Z11Contact, then:
Z
?11：=204.8Ω
Its error is+2.4%, is superior to ± 3% requirement;
When needing output impedance to be 120 Ω, select closed J
Z11, J
Z12, J
Z14, J
Z15Contact, then:
=0.00824?S
Z=121.36Ω
Its error is+1.14%, is superior to ± 3% requirement;
(4) the resistance way of output:
Contact J
K1Closed, J
K2Open circuit; Select J according to calculating
R1～J
R15In corresponding junction closure can accurately export the resistance of cos φ=1,0.1 Ω～200 Ω.
Its way of output is identical with (3).
(5) the impedance resistance in series way of output:
Contact J
K1, J
K2Open circuit; Select J according to calculating
Z1～J
Z15, J
R1～J
R15In corresponding junction closure can accurately export the resistance that cos φ=0.8,0.1 Ω～200 Ω impedances add cos φ=1,0.1 Ω～200 Ω.
Its way of output and (3), (4) are identical.
The beneficial effect of the utility model is to adopt parallel resistance, impedance network to realize the automatic adjusting to the stepless gamut of current transformer secondary load; Can satisfy the technical requirement of current transformer calibrating to secondary load; Can realize the control procedure robotization; Significantly the compression load casing is long-pending; Improve the versatility of Burden box, reduced the Burden box manufacturing cost.Have that method is succinct, economy, science, practicality, workable, low cost and other advantages.
The utility model is applicable to current transformer calibrating technical field.
Description of drawings
Fig. 1 is general stepless automatic adjusting current transformer secondary load case wiring diagram;
Symbol among the figure: J
K1, J
K2It is secondary load way of output pilot relay contact; J
Z1～J
Z15It is each contact of parallel impedance network adjustment pilot relay; J
R1～J
R15It is each contact of parallel resistance network adjustment pilot relay; Z
1～Z
15Be the impedance of cos φ=0.8, its resistance value is respectively 0.1 * 2
1, 0.1 * 2
20.1 * 2
14, 0.1 * 2
15Ω; R
1～R
15Be the resistance of cos φ=1, its resistance is respectively 0.1 * 2
1, 0.1 * 2
20.1 * 2
14, 0.1 * 2
15Ω;
Fig. 2 is traditional Burden box key wiring diagram;
Symbol among the figure: Z
1～Z
13Be the impedance of cos φ=0.8, when rated current was 5A, corresponding resistance value was respectively 0.1; 0.15; 0.2; 0.3; 0.4; 0.5; 0.6; 0.8; 1.0; 1.2; 1.6; 2.0; 2.4 Ω; When rated current was 1A, corresponding resistance value was respectively 0.15; 0.2; 0.6; 1.25; 2.5; 3.75; 5; 7.5; 10; 15; 20; 30; 40 Ω; R
1～R
8Be the resistance of cos φ=1, when rated current was 5A, corresponding resistance value was respectively 0.1; 0.15; 0.2; 0.4; 0.6; 0.8; 1.0; 1.2 Ω; When rated current was 1A, corresponding resistance value was respectively 0.15; 0.2; 0.6; 1.25; 5; 10; 15; 20 Ω; T
0～T
22It is multiconductor switch contact; I
+, I
-Be respectively electric current and flow into, flow out terminal.
Embodiment
The utility model embodiment is as shown in Figure 1.
As shown in Figure 1, with the impedance Z of cos φ=0.8
1～Z
15(0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω) and relay J
Z1～J
Z15Be in turn connected into the parallel impedance network; Resistance R with cos φ=1.0
1～R
15(0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω) and relay J
R1～J
R15Be in turn connected into the parallel resistance network; The parallel impedance network is connected with the parallel resistance network.
(1) the impedance way of output:
Contact J
K2Closed, J
K1Open circuit; Select J according to calculating
Z1～J
Z15In the impedance that can accurately export cos φ=0.8,0.1 Ω～200 Ω of corresponding junction closure.
(2) the resistance way of output:
Contact J
K1Closed, J
K2Open circuit; Select J according to calculating
R1～J
R15In corresponding junction closure can accurately export the resistance of cos φ=1,0.1 Ω～200 Ω.
Its way of output is identical with (1).
(3) the impedance resistance in series way of output:
Contact J
K1, J
K2Open circuit; Select J according to calculating
Z1～J
Z15, J
R1～J
R15In corresponding junction closure can accurately export the resistance that cos φ=0.8,0.1 Ω～200 Ω impedances add cos φ=1,0.1 Ω～200 Ω.
Its way of output and (1), (2) are identical.
Claims (2)
1. a general stepless automatic adjusting current transformer secondary load case is characterized in that said Burden box is by the impedance Z of cos φ=0.8
1～Z
15, cos φ=1.0 resistance R
1～R
15, relay J
Z1～J
Z15And relay J
R1～J
R15Form; Said impedance Z
1～Z
15With relay J
Z1～J
Z15Parallel connection constitutes the parallel impedance network successively; Said resistance R
1～R
15With relay J
R1～J
R15Parallel connection constitutes the parallel resistance network successively; Said parallel impedance network is connected with said parallel resistance network.
2. general stepless automatic adjusting current transformer secondary load case according to claim 1 is characterized in that said impedance Z
1～Z
15Resistance value be respectively 0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω; Said resistance R
1～R
15Resistance value be respectively 0.1 * 2
1, 0.1 * 2
2... 0.1 * 2
14, 0.1 * 2
15Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200901606U CN202471947U (en) | 2012-03-12 | 2012-03-12 | General electrodeless automatic adjustment current transformer secondary load box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200901606U CN202471947U (en) | 2012-03-12 | 2012-03-12 | General electrodeless automatic adjustment current transformer secondary load box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202471947U true CN202471947U (en) | 2012-10-03 |
Family
ID=46920098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200901606U Expired - Fee Related CN202471947U (en) | 2012-03-12 | 2012-03-12 | General electrodeless automatic adjustment current transformer secondary load box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202471947U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738852A (en) * | 2016-04-11 | 2016-07-06 | 江苏方天电力技术有限公司 | Tandem type open circuit-preventing current burden box |
-
2012
- 2012-03-12 CN CN2012200901606U patent/CN202471947U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738852A (en) * | 2016-04-11 | 2016-07-06 | 江苏方天电力技术有限公司 | Tandem type open circuit-preventing current burden box |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204556692U (en) | Multiple way electric metering junction box | |
| CN103399184B (en) | Conveniently can adjust the combined connection box of phase sequence | |
| CN104459393A (en) | Large-capacity adjustable simulation RLC test load | |
| CN202471947U (en) | General electrodeless automatic adjustment current transformer secondary load box | |
| CN204858910U (en) | Generator stator drying system based on exciting arrangement constant voltage mode | |
| CN204359928U (en) | A kind of intelligent electric energy meter Auto-Test System | |
| CN105140813A (en) | Compact American-type substation | |
| CN102736049A (en) | Wireless-remote-control simulated dielectric loss device | |
| CN107621573A (en) | A kind of dielectric dissipation factor standard of high stability | |
| CN102590781A (en) | Method for constructing secondary load of universal stepless self-adjusting current mutual inductor | |
| CN208730809U (en) | A kind of electrical power distribution apparatus | |
| CN102156230A (en) | Temperature-increment testing capability verifying sample | |
| CN207134815U (en) | A kind of mobile voltage-stabilized power supply | |
| CN202435047U (en) | Reactive power adjustable parallel reactor | |
| CN204855665U (en) | Analog circuit is organized to lithium cell for test | |
| CN202872370U (en) | 3 to 35000 KV graded compensation type automatic voltage regulating device | |
| CN203706532U (en) | Transmission line practical training device | |
| CN103675374B (en) | Standard inductance box | |
| CN103117665B (en) | A kind of lithium ion battery module simulation system | |
| CN203251092U (en) | Multifunctional transition source box | |
| CN203216957U (en) | Multistage continuous adjustable hollow test reactor for low voltage ride-through testing device | |
| CN202025050U (en) | Capability verification sample applying to temperature rise test in electrical testing field | |
| CN103427423A (en) | 3-35 kilovolt grading compensation type automatic voltage adjusting device | |
| CN203910508U (en) | Outdoor anti-ferromagnetic resonance voltage transformer | |
| CN210803633U (en) | Safety test platform for non-industrial electric products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121212 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121212 Address after: 330009 No. 88 min Qiang Road, private science and Technology Park, Jiangxi, Nanchang Patentee after: Jiangxi Electric Power Science Academy Patentee after: State Grid Corporation of China Address before: 330009 No. 88 min Qiang Road, private science and Technology Park, Jiangxi, Nanchang Patentee before: Jiangxi Electric Power Science Academy |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20200312 |