CN105929354A - Automatic calibrating device and method for large current transformer - Google Patents
Automatic calibrating device and method for large current transformer Download PDFInfo
- Publication number
- CN105929354A CN105929354A CN201610500596.0A CN201610500596A CN105929354A CN 105929354 A CN105929354 A CN 105929354A CN 201610500596 A CN201610500596 A CN 201610500596A CN 105929354 A CN105929354 A CN 105929354A
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- current transformer
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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
Abstract
The invention relates to an automatic calibrating device for a large current transformer. The automatic calibrating device comprises a voltage regulator, a large current generator, a standard current transformer, a switch controller, a secondary wiring control module, a current transformer calibrator, a control computer and a current load box. The automatic calibrating device and method for a large current transformer realize integration of large current transformer calibrating equipment. A primary loop and a secondary loop allow automatic wiring, and automatic calibrating of current transformers to be tested can be done. Safety of calibrating work and calibrating efficiency for current transformers are improved.
Description
Technical field
The present invention relates to Electric Measurement Technology field, be specifically related to a kind of great current mutual inductor automatic
Assay device and method.
Background technology
Great current mutual inductor is mainly used in energy metering, and electric current maximum can reach a little Wan An
Training, its accuracy is to be directly connected to the justice of metering, the just and economy of electric power enterprise
Benefit.
At present, great current mutual inductor calibration operation is mainly according to JJG1021-2007 calibrating rule
Cheng Kaizhan, calibration equipment includes manual voltage regulator, capacitor compensation cabinet, current lifting device, standard electric
Current transformer, tested transformer, current capacity case and current transformer calibrator, respectively set
Standby is scattered, is not an organic whole, and experimentation needs wiring manually to enter
The test of each code point of row, automaticity is low, and safety is low.
Summary of the invention
It is an object of the invention to provide a kind of great current mutual inductor automatic calibrator and side
Method, these apparatus and method can realize the automatic Verification of great current mutual inductor, improves calibration operation
Efficiency and safety.
For solving above-mentioned technical problem, a kind of great current mutual inductor disclosed by the invention is examined automatically
Determine device, it include pressure regulator, current lifting device, standard current transformer, switch controller,
Secondary connection control module, current transformer calibrator, control computer and current capacity case,
Wherein, the primary of described pressure regulator connects alternating current power supply, and the secondary of pressure regulator connects current lifting device
Primary, one end that the secondary one end connection standard current transformer of current lifting device is primary, up-flow
The one end of the other end connection wire link block that device is secondary, the other end of wire link block
Connecting one end that tested current transformer is primary, the other end of tested current transformer primary is even
Connect the other end that standard current transformer is primary, the control signal input of wire link block
The control signal outfan of connecting valve controller, one end of tested secondary transformer leads to
Cross secondary connection control module and connect one end of current capacity case, the other end of current capacity case
Connect the secondary tested binding post TX of current transformer calibrator, tested current transformer
The other end of level connects the difference stream of current transformer calibrator by secondary connection control module
Road signal flows into terminal K, and standard current transformer secondary one end connects tested current transformer
The secondary other end, the other end of standard current transformer secondary controls mould by secondary connection
Block connects the secondary standard binding post T0 of current transformer calibrator, and current transformer verifies
The difference stream tributary signal of instrument flows out terminal D and connects the earth terminal of current transformer calibrator, control
The control signal input of the switch controlling signal outfan connecting valve controller of computer processed
End, the rated load parameter output of current transformer calibrator connects the specified of current capacity case
Load parameter input, the pressure regulator control signal outfan of current transformer calibrator connects to be adjusted
The control signal input of depressor.
A kind of automatic Verification method utilizing above-mentioned great current mutual inductor automatic calibrator, its
Being characterised by, it comprises the steps:
Step 1: open the switch of current transformer calibrator；
Step 2: close by controlling computer operation switch controller pilot link block；
Step 3: primary current is set in controlling computer according to tested current transformer nameplate
Parameter, secondary current parameter, rated load parameter, lower limit load parameter, class of accuracy are joined
Number and power factor parameter；
Step 4: control computer by by above-mentioned primary current parameter, secondary current parameter,
Rated load parameter, lower limit load parameter, class of accuracy parameter and the conveying of power factor parameter
To current transformer calibrator；
Step 5: power factor (PF) parameter is transferred to capacitor compensation cabinet by current transformer calibrator,
Capacitor compensation cabinet is according to the power factor (PF) state modulator calibrating power loop factor obtained；
Step 6: rated load parameter is transmitted to current capacity case by current transformer calibrator,
Current capacity case arranges calibrating loop load parameter according to the rated load parameter obtained；
Step 7: current transformer calibrator control pressure regulator rises successively and flow to JJG1021-2007
Following rated current percentage ratio that " electric power mutual-inductor vertification regulation " specifies 1%, 5%, 20%,
100% and 120%, current transformer calibrator records above each rated current percentage ratio automatically
Error amount, and the rated current percentage error value of record is transmitted to controlling computer；
Step 8: current transformer calibrator controls pressure regulator will examine and determine the near 0V of loop voltage；
Step 9: lower limit load parameter is delivered to current capacity case by current transformer calibrator,
By current capacity case, calibrating loop lower limit load parameter is set；
Step 10: repeat step 7 and step 8；
Step 11: control computer and automatically generate probation redport.
The great current mutual inductor automatic calibrator of present invention offer and method, it is achieved that big electric current
Ct calibrating integration of equipments, and the primary circuit of this device and secondary circuit all can connect automatically
Line, moreover it is possible to complete the automatic Verification of tested current transformer, improves detecting current transformer work
The safety made and calibrating efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Wherein, 1 pressure regulator, 2 capacitor compensation cabinets, 3 current lifting devices, 4 current capacities
Case, 5 standard current transformers, 6 switch controllers, 7 secondary connection control modules,
8 current transformer calibrators, 9 control computers, 10 wire link blocks, 11
Tested current transformer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Great current mutual inductor automatic calibrator of the present invention, it include pressure regulator 1, current lifting device 3,
Standard current transformer 5, switch controller 6, secondary connection control module 7, Current Mutual Inductance
Device tester 8, control computer 9 and current capacity case 4, wherein, described pressure regulator 1
Primary connection alternating current power supply, the secondary primary connecting current lifting device 3 of pressure regulator 1, current lifting device 3
One end of secondary one end connection standard current transformer 5 primary, 3 levels of current lifting device another
One end connects one end of wire link block 10, and the other end of wire link block 10 connects
One end (end of the tested identical no-load voltage ratio of current transformer 11 of tested current transformer 11 primary
Son), the other end connection standard current transformer 5 of tested current transformer 11 primary is primary
The other end, the control signal input connecting valve controller 6 of wire link block 10
Control signal outfan, one end of tested 11 levels of current transformer is controlled by secondary connection
Module 7 connects one end of current capacity case 4, and the other end of current capacity case 4 connects electric current
The secondary tested binding post TX of mutual-inductor tester 8,11 levels of tested current transformer
The other end by secondary connection control module 7 connect current transformer calibrator 8 difference stream
Tributary signal flows into terminal K, and it is mutual that 5 level one end of standard current transformer connect tested electric current
The other end of 11 levels of sensor, the other end of 5 levels of standard current transformer is connect by secondary
Line traffic control module 7 connects the secondary standard binding post T0 of current transformer calibrator 8, electricity
The difference stream tributary signal of current transformer tester 8 flows out terminal D and connects current transformer verification
The earth terminal of instrument 8, the switch controlling signal outfan connecting valve controlling computer 9 controls
The control signal input of device 6, the rated load parameter output of current transformer calibrator 8
Connect the rated load parameter input of current capacity case 4, the tune of current transformer calibrator 8
Depressor control signal outfan connects the control signal input of pressure regulator 1.
In technique scheme, wire link block 10 facilitates wire during primary connection to stretch.
Secondary connection control module 7 realizes second loop return wiring and automatically switches.
In technique scheme, the ct calibrating no-load voltage ratio of described current transformer calibrator 8
The ct calibrating no-load voltage ratio of switch-over control signal outfan connecting secondary wiring control module 7 is cut
Change control signal input.
In technique scheme, it also includes that (capacitor compensation cabinet 2 is used for mending capacitor compensation cabinet 2
Repay test loop reactive power, thus reduce surge capacity), the first of capacitor compensation cabinet 2
Binding post connects one end of 1 level of pressure regulator, the second binding post of capacitor compensation cabinet 2
Connect the other end of 1 level of pressure regulator, the power factor (PF) outfan of current transformer calibrator 8
Connect the power factor (PF) input of capacitor compensation cabinet 2.
In technique scheme, the parameter of described control computer 9 arranges communication ends and connects electric current
The parameter of mutual-inductor tester 8 arranges communication ends.
In technique scheme, the primary of described pressure regulator 1 connects 380V alternating current power supply.
A kind of automatic Verification method utilizing above-mentioned great current mutual inductor automatic calibrator, it
Comprise the steps:
Step 1: open the switch of current transformer calibrator 8；
Step 2: operate switch controller 6 pilot link block by controlling computer 9
10 Guan Bis；
Step 3: arrange once in controlling computer 9 according to tested current transformer 11 nameplate
Current parameters, secondary current parameter, rated load parameter, lower limit load parameter, accuracy
Level parameter and power factor parameter；
Step 4: control computer 9 by by above-mentioned primary current parameter, secondary current parameter,
Rated load parameter, lower limit load parameter, class of accuracy parameter and the conveying of power factor parameter
To current transformer calibrator 8；
Step 5: power factor (PF) parameter is transferred to capacitor compensation cabinet by current transformer calibrator 8
2, capacitor compensation cabinet 2 is according to the power factor (PF) state modulator calibrating power loop factor obtained；
Step 6: rated load parameter is transmitted to current capacity case by current transformer calibrator 8
4, current capacity case 4 arranges calibrating loop load parameter according to the rated load parameter obtained；
Step 7: current transformer calibrator 8 controls pressure regulator 1 and rises successively and flow to
Following rated current percentage ratio 1% that JJG1021-2007 " electric power mutual-inductor vertification regulation " specifies,
5%, 20%, 100% and 120%, current transformer calibrator 8 records above each specified automatically
The error amount of percentage of current, and by the rated current percentage error value transmission of record to controlling
Computer 9；
Step 8: current transformer calibrator 8 controls pressure regulator 1, and will to examine and determine loop voltage near
0V；
Step 9: lower limit load parameter is delivered to current capacity case by current transformer calibrator 8
4, by current capacity case 4, calibrating loop lower limit load parameter is set；
Step 10: repeat step 7 and step 8；
Step 11: control computer 9 and automatically generate probation redport；
Step 12: control computer 9 and operate switch controller 6 pilot link block 10
Disconnect；
Step 13: take out tested current transformer 11, complete certificate test；
Step 14: close current transformer calibrator 8.
The present invention can realize the automatic Verification of great current mutual inductor, improve calibration operation efficiency and
Safety.
The content that this specification is not described in detail belongs to known to professional and technical personnel in the field
Prior art.
Claims (7)
1. a great current mutual inductor automatic calibrator, it is characterised in that: it includes pressure regulation
Device (1), current lifting device (3), standard current transformer (5), switch controller (6), two
Secondary wiring control module (7), current transformer calibrator (8), control computer (9) and
Current capacity case (4), wherein, the primary of described pressure regulator (1) connects alternating current power supply, adjusts
The secondary primary connecting current lifting device (3) of depressor (1), one end that current lifting device (3) is secondary
One end that connection standard current transformer (5) is primary, the other end that current lifting device (3) is secondary
Connecting one end of wire link block (10), the other end of wire link block (10) is even
Connecing one end that tested current transformer (11) is primary, tested current transformer (11) is primary
The primary other end of other end connection standard current transformer (5), wire link block (10)
The control signal outfan of control signal input connecting valve controller (6), tested electricity
One end of current transformer (11) secondary connects electric current by secondary connection control module (7) and bears
One end of lotus case (4), the other end of current capacity case (4) connects current transformer verification
The secondary tested binding post TX of instrument (8), secondary another of tested current transformer (11)
One end connects the difference of current transformer calibrator (8) by secondary connection control module (7)
Stream tributary signal flows into terminal K, and the secondary one end of standard current transformer (5) connects tested electricity
The other end that current transformer (11) is secondary, the other end that standard current transformer (5) is secondary
Two deutero-albumoses of current transformer calibrator (8) are connected by secondary connection control module (7)
Quasi-binding post T0, the difference stream tributary signal of current transformer calibrator (8) flows out terminal D
Connect the earth terminal of current transformer calibrator (8), control the switch control of computer (9)
The control signal input of signal output part connecting valve controller (6) processed, current transformer
The rated load parameter output of tester (8) connects the rated load of current capacity case (4)
Parameter input, the pressure regulator control signal outfan of current transformer calibrator (8) connects
The control signal input of pressure regulator (1).
Great current mutual inductor automatic calibrator the most according to claim 1, its feature
It is: the ct calibrating no-load voltage ratio switch-over control signal of described current transformer calibrator (8)
The ct calibrating no-load voltage ratio switch-over control signal of outfan connecting secondary wiring control module (7)
Input.
Great current mutual inductor automatic calibrator the most according to claim 1, its feature
It is: it also includes capacitor compensation cabinet (2), the first binding post of capacitor compensation cabinet (2)
Connecting one end that pressure regulator (1) is secondary, the second binding post of capacitor compensation cabinet (2) is even
Connecing the other end that pressure regulator (1) is secondary, the power factor (PF) of current transformer calibrator (8) is defeated
Go out end and connect the power factor (PF) input of capacitor compensation cabinet (2).
Great current mutual inductor automatic calibrator the most according to claim 1, its feature
It is: the parameter of described control computer (9) arranges communication ends and connects current transformer verification
The parameter of instrument (8) arranges communication ends.
Great current mutual inductor automatic calibrator the most according to claim 1, its feature
It is: the primary of described pressure regulator (1) connects 380V alternating current power supply.
6. one kind utilizes the automatic of great current mutual inductor automatic calibrator described in claim 1
Calibration method, it is characterised in that it comprises the steps:
Step 1: open the switch of current transformer calibrator (8)；
Step 2: by controlling computer (9) operation switch controller (6) pilot even
Connection module (10) closes；
Step 3: set in controlling computer (9) according to tested current transformer (11) nameplate
Put primary current parameter, secondary current parameter, rated load parameter, lower limit load parameter, standard
Exactness class parameter and power factor parameter；
Step 4: control computer (9) by above-mentioned primary current parameter, secondary current being joined
Number, rated load parameter, lower limit load parameter, class of accuracy parameter and power factor parameter
It is delivered to current transformer calibrator (8)；
Step 5: power factor (PF) parameter is transferred to capacitance compensation by current transformer calibrator (8)
Cabinet (2), capacitor compensation cabinet (2) is according to the power factor (PF) state modulator calibrating loop merit obtained
Rate factor；
Step 6: rated load parameter is transmitted to current capacity by current transformer calibrator (8)
Case (4), current capacity case (4) arranges calibrating loop according to the rated load parameter obtained and bears
Lotus parameter；
Step 7: current transformer calibrator (8) control pressure regulator (1) rises successively and flow to
Following rated current percentage ratio 1% that JJG1021-2007 " electric power mutual-inductor vertification regulation " specifies,
5%, 20%, 100% and 120%, current transformer calibrator (8) record automatically is above each
The error amount of rated current percentage ratio, and the rated current percentage error value of record is transmitted extremely
Control computer (9)；
Step 8: current transformer calibrator (8) controls pressure regulator (1) will calibrating loop electricity
Press near 0V；
Step 9: lower limit load parameter is delivered to current capacity by current transformer calibrator (8)
Case (4), arranges calibrating loop lower limit load parameter by current capacity case (4)；
Step 10: repeat step 7 and step 8；
Step 11: control computer (9) and automatically generate probation redport.
Automatic Verification method the most according to claim 6, it is characterised in that: described step
Step 12 is also included: control computer (9) operation switch controller (6) and control after rapid 11
Wire link block (10) disconnects；
Step 13: take out tested current transformer (11), complete certificate test；
Step 14: close current transformer calibrator (8).
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|---|---|---|---|
| CN201610500596.0A CN105929354B (en) | 2016-06-29 | 2016-06-29 | Great current mutual inductor automatic calibrator and method |
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|---|---|---|---|
| CN201610500596.0A CN105929354B (en) | 2016-06-29 | 2016-06-29 | Great current mutual inductor automatic calibrator and method |
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| CN105929354A true CN105929354A (en) | 2016-09-07 |
| CN105929354B CN105929354B (en) | 2018-10-16 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255791A (en) * | 2017-06-09 | 2017-10-17 | 国网四川省电力公司电力科学研究院 | A kind of full-automatic verification system of program control type current transformer |
| CN107271944A (en) * | 2017-06-09 | 2017-10-20 | 国网四川省电力公司电力科学研究院 | A kind of full-automatic termination of program control type current transformer |
| CN107643504A (en) * | 2017-09-08 | 2018-01-30 | 国网重庆市电力公司电力科学研究院 | A kind of mutual inductor on site examines wiring and automatic switching method |
| CN107703391A (en) * | 2017-10-17 | 2018-02-16 | 云南电网有限责任公司电力科学研究院 | A kind of secondary circuit detecting system of transformer station |
| CN107957569A (en) * | 2017-11-27 | 2018-04-24 | 国网福建省电力有限公司 | A kind of building block system experimental rig for field calibration GIS formula current transformers |
| CN109387802A (en) * | 2018-09-18 | 2019-02-26 | 国网江苏省电力有限公司淮安供电分公司 | A kind of rated current error testing method of high-tension current inductor |
| CN109407034A (en) * | 2018-12-12 | 2019-03-01 | 云南电网有限责任公司昆明供电局 | A kind of synchronization of great current mutual inductor first and second termination |
| CN109507524A (en) * | 2018-12-29 | 2019-03-22 | 深圳英利泰斯科技有限公司 | A kind of one secondary connection calibration equipment of switchgear |
| CN110703176A (en) * | 2019-11-29 | 2020-01-17 | 江苏方天电力技术有限公司 | Current transformer error testing system and method under limit temperature |
| CN110888099A (en) * | 2019-12-09 | 2020-03-17 | 国网山东省电力公司电力科学研究院 | Test control system and method |
| CN111693925A (en) * | 2020-07-20 | 2020-09-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer detection operation platform and multi-position top-speed current transformer calibration system |
| CN111856192A (en) * | 2020-07-31 | 2020-10-30 | 深圳市德恒科技有限公司 | No load check out test set |
| CN112068062A (en) * | 2020-09-10 | 2020-12-11 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
| CN115980654A (en) * | 2023-02-03 | 2023-04-18 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6082873A (en) * | 1983-10-12 | 1985-05-11 | Toshiba Corp | Loading apparatus of instrument transformer |
| CN2574066Y (en) * | 2002-09-28 | 2003-09-17 | 武汉华电国电高压科技发展有限公司 | In-situ mutual inductor checking device |
| CN2684209Y (en) * | 2004-03-30 | 2005-03-09 | 马斌 | Mobile equipment for on-site current transformer testing |
| CN202486302U (en) * | 2012-02-02 | 2012-10-10 | 浙江省电力试验研究院 | 220kV mutual inductor field metering vehicle |
| CN103293504A (en) * | 2013-06-04 | 2013-09-11 | 国家电网公司 | On-site current transformer comprehensive detector and testing method thereof |
| CN203250017U (en) * | 2013-06-04 | 2013-10-23 | 国家电网公司 | On-site current transformer comprehensive detection device |
| CN105372613A (en) * | 2015-12-01 | 2016-03-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method of automatic zero setting and zero detection for verification of current transformer on the basis of current comparator |
| CN205787084U (en) * | 2016-06-29 | 2016-12-07 | 国家电网公司 | Great current mutual inductor automatic calibrator |
-
2016
- 2016-06-29 CN CN201610500596.0A patent/CN105929354B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6082873A (en) * | 1983-10-12 | 1985-05-11 | Toshiba Corp | Loading apparatus of instrument transformer |
| CN2574066Y (en) * | 2002-09-28 | 2003-09-17 | 武汉华电国电高压科技发展有限公司 | In-situ mutual inductor checking device |
| CN2684209Y (en) * | 2004-03-30 | 2005-03-09 | 马斌 | Mobile equipment for on-site current transformer testing |
| CN202486302U (en) * | 2012-02-02 | 2012-10-10 | 浙江省电力试验研究院 | 220kV mutual inductor field metering vehicle |
| CN103293504A (en) * | 2013-06-04 | 2013-09-11 | 国家电网公司 | On-site current transformer comprehensive detector and testing method thereof |
| CN203250017U (en) * | 2013-06-04 | 2013-10-23 | 国家电网公司 | On-site current transformer comprehensive detection device |
| CN105372613A (en) * | 2015-12-01 | 2016-03-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method of automatic zero setting and zero detection for verification of current transformer on the basis of current comparator |
| CN205787084U (en) * | 2016-06-29 | 2016-12-07 | 国家电网公司 | Great current mutual inductor automatic calibrator |
Non-Patent Citations (2)
| Title |
|---|
| 廖卉芬 等: "智能型电力互感器移动计量检定系统设计与应用", 《水电能源科学》 * |
| 赵玉富: "电流互感器的现场检验", 《河南电力》 * |
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| CN107271944B (en) * | 2017-06-09 | 2020-06-23 | 国网四川省电力公司电力科学研究院 | Full-automatic wiring device of program-controlled current transformer |
| CN107271944A (en) * | 2017-06-09 | 2017-10-20 | 国网四川省电力公司电力科学研究院 | A kind of full-automatic termination of program control type current transformer |
| CN107255791A (en) * | 2017-06-09 | 2017-10-17 | 国网四川省电力公司电力科学研究院 | A kind of full-automatic verification system of program control type current transformer |
| CN107643504A (en) * | 2017-09-08 | 2018-01-30 | 国网重庆市电力公司电力科学研究院 | A kind of mutual inductor on site examines wiring and automatic switching method |
| CN107703391A (en) * | 2017-10-17 | 2018-02-16 | 云南电网有限责任公司电力科学研究院 | A kind of secondary circuit detecting system of transformer station |
| CN107957569A (en) * | 2017-11-27 | 2018-04-24 | 国网福建省电力有限公司 | A kind of building block system experimental rig for field calibration GIS formula current transformers |
| CN109387802A (en) * | 2018-09-18 | 2019-02-26 | 国网江苏省电力有限公司淮安供电分公司 | A kind of rated current error testing method of high-tension current inductor |
| CN109407034A (en) * | 2018-12-12 | 2019-03-01 | 云南电网有限责任公司昆明供电局 | A kind of synchronization of great current mutual inductor first and second termination |
| CN109407034B (en) * | 2018-12-12 | 2023-09-08 | 云南电网有限责任公司昆明供电局 | Primary and secondary synchronous wiring device of large-current transformer |
| CN109507524A (en) * | 2018-12-29 | 2019-03-22 | 深圳英利泰斯科技有限公司 | A kind of one secondary connection calibration equipment of switchgear |
| CN110703176A (en) * | 2019-11-29 | 2020-01-17 | 江苏方天电力技术有限公司 | Current transformer error testing system and method under limit temperature |
| CN110888099A (en) * | 2019-12-09 | 2020-03-17 | 国网山东省电力公司电力科学研究院 | Test control system and method |
| CN111693925A (en) * | 2020-07-20 | 2020-09-22 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer detection operation platform and multi-position top-speed current transformer calibration system |
| CN111856192A (en) * | 2020-07-31 | 2020-10-30 | 深圳市德恒科技有限公司 | No load check out test set |
| CN112068062A (en) * | 2020-09-10 | 2020-12-11 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
| CN112068062B (en) * | 2020-09-10 | 2023-01-03 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
| CN115980654A (en) * | 2023-02-03 | 2023-04-18 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
| CN115980654B (en) * | 2023-02-03 | 2023-10-31 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
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