WO2017086604A1 - Transformateur de courant séparable - Google Patents

Transformateur de courant séparable Download PDF

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Publication number
WO2017086604A1
WO2017086604A1 PCT/KR2016/011392 KR2016011392W WO2017086604A1 WO 2017086604 A1 WO2017086604 A1 WO 2017086604A1 KR 2016011392 W KR2016011392 W KR 2016011392W WO 2017086604 A1 WO2017086604 A1 WO 2017086604A1
Authority
WO
WIPO (PCT)
Prior art keywords
current transformer
cable
sides
magnetic core
core
Prior art date
Application number
PCT/KR2016/011392
Other languages
English (en)
Korean (ko)
Inventor
구자일
Original Assignee
주식회사 페라리스파워
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 페라리스파워 filed Critical 주식회사 페라리스파워
Publication of WO2017086604A1 publication Critical patent/WO2017086604A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers

Definitions

  • the present invention relates to a split current transformer, and more particularly, to a split current transformer that can be fixed and detached easily and can measure current accurately and uniformly by centering the cable regardless of the specification of the cable used.
  • the power cable passing through the current transformer structure may not be located in the center of the current transformer structure, depending on its size.
  • the power cable of each standard shows different characteristics, and the performance varies depending on the degree of fixing the line.
  • the left and right cross-sections of the removable magnetic core are connected by only one ring, so that the surface of the magnetic core is in close contact with only one side, and the other side cannot guarantee this, and thus the performance is greatly affected.
  • the conventional current transformer structure has the following problems.
  • Patent Document 1 KR0822350 B
  • an embodiment of the present invention provides a separate current transformer that can be applied irrespective of the specification of the power cable while reducing the measurement error and the number of calibration due to the power cable bias. I would like to.
  • the lower body having a locking means on both sides, having a semi-cylindrical first cable receiving portion in the center;
  • An upper body having lock rings corresponding to the locking means on both sides, and having a second cylindrical housing portion having a semi-cylindrical shape corresponding to the first cable receiving portion;
  • Two pairs of main adapters each having a semicircle enhancement to extend each of the first cable accommodating part and the second cable accommodating part, and having fixing parts extending on both sides thereof, the fixing parts having a fixing hole;
  • a semi-circular shape so as to form a concentric circle with a circle formed by each of the two pairs of main adapters, and having an inner diameter corresponding to the size of the power cable to be installed in the first cable receiving portion and the second cable receiving portion.
  • a separate current transformer is provided that includes a pair of auxiliary adapters.
  • each of the two pair of auxiliary adapters may include a coupling protrusion formed at the center along the outer circumferential surface of the semicircular shape.
  • the lower body comprises a semi-circular magnetic core; A lower case accommodating the magnetic core; And a lower case cover formed at the center of the first cable receiving part and covering an upper side of the lower case so that both ends of the magnetic core are exposed to the outside.
  • the lower case the core receiving portion for the magnetic core; A molding hole formed under the core accommodating part to insert a molding member; Stepped portions formed at both sides of the core receiving portion; A connection part extending to protrude from the step portion to the outside; Engaging grooves formed in a plurality of positions around the core receiving portion; And it may include a locking means formed on both sides in a direction perpendicular to the connecting portion.
  • the lower body comprises a semi-circular magnetic core; An upper case accommodating the magnetic core; And a lower case cover formed at the center of the second cable receiving part and disposed under the upper case so that both ends of the magnetic core are exposed to the outside.
  • the upper case the core receiving portion for the magnetic core; A molding hole penetrating upward from the core accommodating part to insert a molding member; Stepped portions formed at both sides of the core receiving portion; A connection part extending to protrude from the step portion to the outside; And locking rings formed at both sides in a direction perpendicular to the connection part.
  • the split current transformer according to an embodiment of the present invention is configured such that the main adapter and the auxiliary adapter are concentric, so that the installed power cable is always installed in the center of the current transformer, thereby minimizing a measurement error according to the installation method. In this case, problems that need to be considered in maintenance such as calibration can be greatly reduced.
  • the present invention can be applied immediately in the field irrespective of the type of power cable or the structure to be applied, by providing an auxiliary adapter of various thickness, it is possible to implement the performance and uniformity of the desired product with a minimum development cost.
  • the present invention is fixed on both sides of the current transformer by the locking means and the locking ring, so that the contact surfaces on both sides of the separate magnetic core to be uniformly contacted with each other, thereby reducing the noise effect due to the uniformity of the performance of the power supply and the sensor and poor contact. It can be secured.
  • FIG. 1 is an external perspective view of a split current transformer according to an exemplary embodiment of the present invention.
  • FIG. 2 is a plan view of a split current transformer according to an embodiment of the present invention.
  • FIG 3 is an external perspective view of a lower end of the split current transformer according to an exemplary embodiment of the present invention.
  • FIG. 4 is an exploded perspective view of FIG. 3.
  • FIG 5 is an external perspective view of an upper end of the split current transformer according to an exemplary embodiment of the present invention.
  • FIG. 6 is an exploded perspective view of FIG. 5.
  • Figure 7 is an exploded perspective view of the lower body of the split current transformer according to an embodiment of the present invention.
  • FIG 8 is an exploded perspective view of the upper body of the split current transformer according to the embodiment of the present invention.
  • FIG. 9 is a plan view of a lower body in a state in which a power cable is accommodated in a separate current transformer according to an embodiment of the present invention.
  • FIG. 10 is a plan view of a state in which a power cable is accommodated in a separate current transformer according to an embodiment of the present invention.
  • FIG. 11 is an external perspective view of a state in which a power cable is accommodated in a separate current transformer according to an embodiment of the present invention.
  • first cable receiving portion 113 connecting portion
  • locking ring 122 second cable receiving portion
  • connecting portion 123a insertion groove
  • fixing hole 132 body receiving groove
  • auxiliary receiving groove 134 partition wall
  • fixing part 140, 140a ⁇ 140d auxiliary adapter
  • the present invention relates to a current transformer structure for power acquisition and current sensing devices using electromagnetic induction phenomena generated in existing lines, and provides a new basic structure for current transformers and current sensors based on magnetic cores. .
  • the outer diameter of the finished product is different depending on the use specification of the power cable applied to the existing current transformers, when installing a detachable structure such as the current transformer, additional assembly and power of the structure Fixing problems that can properly secure current transformer structures on power cables, such as changing cable specifications, can be solved.
  • the present invention forms a structure that the power cable always penetrates the center of the current transformer irrespective of the specification, it is possible to improve the accuracy of the current sensor due to the phase difference of the magnetic field generated in the line, the number of required calibration Can be reduced.
  • the present invention by fixing the removable magnetic core with the same amount of force on both sides, thereby uniformly contacting the contact surface of the removable magnetic core, it is possible to ensure the uniformity of the performance of the power supply and the sensor, as well as related noise problems Can also be reduced.
  • the split current transformer 100 includes a lower body 110, an upper body 120, a main adapter 130, and an auxiliary adapter 140.
  • the lower body 110 is provided with a magnetic core 102, the locking means 111 for coupling with the upper body 120 on both sides, the semi-cylindrical first cable receiving portion 112 in the center of the upper side ).
  • the upper body 120 is provided with a magnetic core 104, the locking ring 121 corresponding to the locking means 111 on both sides, and has a semi-cylindrical second cable receiving portion 122 in the center do.
  • the locking means 111 such as a clamp on both sides
  • the cross-section of the removable magnetic core (102, 104) can be combined under constant pressure to each other. Therefore, there is an effect that makes the contact surface constant. That is, even if only one side, or even if combined from both sides using a screw (Screw), etc., it is very difficult to combine the same force on both cross-sections of the separate magnetic core to have a great impact on the performance of the split current transformer (100) do.
  • the structure using the locking means 111 such as a clamp on both sides of the separate current transformer 100 can be implemented by a simple operation of the operator without worrying that the two sides of the separate current transformer 100 to be coupled with the same force. In this way, the performance and maintenance management of the separate current transformer 100 has a very big impact.
  • the cylindrical housing formed by the first cable receiving portion 112 and the second cable receiving portion 122 may accommodate the power cable.
  • the inner diameter of the circle formed by the first cable receiving part 112 and the second cable receiving part 122 may be designed and manufactured to reflect the maximum value of the outer diameter of the standard power cable.
  • the locking means 111 provided on both sides of the lower body 110 is a clamp, for example, the locking wire of the clamp is fixed to the locking ring 121 provided on both sides of the upper body 120, Body 110 and upper body 120 is integrally coupled.
  • the magnetic cores 102 and 104 embedded in the lower body 110 and the upper body 120, respectively, are disposed outside the cylinder formed by the first cable receiving part 112 and the second cable receiving part 122.
  • power acquisition and current sensing functions can be performed according to the electromagnetic induction shape.
  • the main adapter 130 is composed of two pairs of semi-circle enhancements to extend to the first cable receiving portion 112 and the second cable receiving portion 122, respectively, and includes fixing parts 135 extending on both sides.
  • the fixing hole 131 is provided in the government 135.
  • the pair of main adapters 130a and 130c are coupled to one side of the lower body 110 and the upper body 120, and the other pair of main adapters 130b and 130d are the lower body 110 and the upper body. It is coupled to the other side of the 120.
  • the inner diameter of the circle formed by each of the main adapter (130a ⁇ 130d) is the same as the inner diameter of the circle formed by the first cable receiving portion 112 and the second cable receiving portion 122.
  • the main adapter 130 is not only a function as a holder for mounting the auxiliary adapter 140 that meets the specifications of the power cable, but also, if necessary, silicon work to fill the gap between the power cable and the separate current transformer 100 structure. For this purpose, there is a function to secure the space.
  • the auxiliary adapter 140 is composed of two pairs of semi-circular shapes so as to form a concentric circle with a circle formed by each of the two pairs of the main adapters 130, and the first cable receiving part 112 and the second cable receiving part 122. It has an inner diameter corresponding to the size of the power cable to be installed in.
  • the pair of auxiliary adapters 140a and 140c form a circle inscribed in the pair of main adapters 130a and 130c
  • the other pair of auxiliary adapters 140b and 140d are the other pair of main adapters 130b. 130d) to form an inscribed circle.
  • the auxiliary adapters 140a to 140d may be formed in plural in accordance with the specifications of the power cable, and may be combined in the main adapters 130a to 130d as necessary. That is, the inner diameter of the circle formed by each of the auxiliary adapters 140a to 140d may be configured in plural numbers according to the size (outer diameter) of the power cable to be installed.
  • the main adapter (130a ⁇ 130d) and the auxiliary adapter (140a ⁇ 140d) are equally coupled to both sides of the structure of the separate current transformer 100, the power cable in the separate current transformer 100 magnetic core (102, 104) It can maintain a uniform interval while penetrating.
  • the lower end of the split current transformer 100 includes a lower body 110, main adapters 130a and 130b, and auxiliary adapters 140a and 140b.
  • main adapter 130a and the auxiliary adapter 140a may be coupled to one side of the lower body 110, and the main adapter 130b and the auxiliary adapter 140b may be coupled to the other side of the lower body 110.
  • each of the main adapters 130a and 130b includes a body accommodating groove 132 and an auxiliary accommodating groove 133.
  • Body receiving groove 132 is formed along the inner surface of the semi-circular shape so that the lower body 110 is inserted.
  • the body receiving groove 132 is disposed on the lower body 110 side, the connection portion 113 of the lower body 110 is inserted.
  • the lower body 110 has a connecting portion 113 is formed to extend to the outside, the insertion groove 113a may be provided along the lower surface of the connecting portion 113.
  • Auxiliary receiving groove 133 is formed along the inner surface of the semi-circular shape so that the auxiliary adapter (140a, 140b) is inserted.
  • the auxiliary receiving groove 133 is disposed outside the body receiving groove 132, the auxiliary adapter (140a, 140b) is inserted.
  • the body receiving groove 132 and the auxiliary receiving groove 133 are spaced apart at regular intervals by the partition wall 134, the partition wall 134 is the first cable receiving part (when the lower body 110 is inserted) 112 and the same height.
  • one side of the main adapter (130a, 130b) forming another partition of the body receiving groove 132 may be formed at a height lower than the spaced portion as the depth of the insertion groove (113a) of the connection portion 113.
  • the other side of the main adapter (130a, 130b) forming the partition of the separation portion and the auxiliary receiving groove 133 may be formed at the same height as the separation portion.
  • Each of the auxiliary adapters 140a and 140b may include a coupling protrusion 141 formed at the center along an outer circumferential surface of the semicircular shape. At this time, the coupling protrusion 141 may be inserted into the auxiliary receiving groove 133.
  • each of the auxiliary adapters 140a and 140b may have an inner diameter thereof according to the specification of the power cable.
  • the lower end of the split current transformer 100 inserts the connecting portion 113 of the lower body 110 into the body receiving groove 132 of the main adapters 130a and 130b, and at the same time, one side of the main adapters 130a and 130b. Is inserted into the insertion groove 113a of the connection portion 113 of the lower body 110, it can be configured by inserting the auxiliary adapter (140a, 140b) in the auxiliary receiving groove 133.
  • the lower end of the split current transformer 100 includes an upper body 120, main adapters 130c and 130d, and auxiliary adapters 140c and 140d.
  • main adapter 130c and the auxiliary adapter 140d may be coupled to one side of the upper body 120, and the main adapter 130d and the auxiliary adapter 140d may be coupled to the other side of the upper body 120.
  • main adapters 130c and 130d and the auxiliary adapters 140c and 140d are similar to the main adapters 130a and 130b and the auxiliary adapters 140a and 140b described with reference to FIGS. 3 and 4, detailed descriptions thereof will be omitted. .
  • the upper body 120 may include a connection part 123 extending outward, and an insertion groove 123a may be provided along a lower surface of the connection part 123.
  • one side of the main adapter (130c, 130d) forming a partition between the body receiving groove 132 and the auxiliary receiving groove 133 and the body receiving groove 132 is the insertion groove 123a of the connection portion 123 It may be formed to a height lower than the spaced portion by the depth of.
  • the upper end of the split current transformer 100 inserts the connecting portion 123 of the upper body 120 into the body receiving groove 132 of the main adapters 130c and 130d, and at the same time, one side of the main adapters 130c and 130d. Is inserted into the insertion groove 123a of the connecting portion 123 of the upper body 120, it may be configured by inserting the auxiliary adapter (140c, 140d) in the auxiliary receiving groove 133.
  • the split current transformer 100 may be configured.
  • the lower body 110 includes a magnetic core 102, a lower case 110a, and a lower case cover 110b.
  • Magnetic core 102 may be made in a semicircular shape for a separate current transformer structure.
  • the magnetic core 102 may be inserted into the bobbin 102a having an arc length smaller than the magnetic core 102 so that a part of both ends thereof are exposed to the outside.
  • the coil 103 may be wound on the outer surface of the bobbin 102a so as not to directly contact the magnetic core 102.
  • the lower case 110a has a core accommodating part 115 for accommodating the magnetic core 102 formed at the center thereof, and a molding hole 116 for inserting a molding member is formed at the lower side of the core accommodating part 115.
  • a core accommodating part 115 for accommodating the magnetic core 102 formed at the center thereof, and a molding hole 116 for inserting a molding member is formed at the lower side of the core accommodating part 115.
  • Stepped portion 114 having a predetermined height is formed on both sides of the core receiving portion 115, it may be formed extending from the stepped portion 114 so that the connection portion 113 protrudes to the outside.
  • the connecting portion 113 may be formed at a height higher than the stepped portion 114.
  • Coupling grooves 117 may be formed at a plurality of positions, for example, corner portions and six left and right sides around the core accommodating portion 115.
  • the locking means 111 may be formed at both sides of the lower case 110a in a direction perpendicular to the connecting portion 113.
  • the lower case cover 110b has a first cable receiving portion 112 formed at the center thereof, and through holes 118 on both sides of the first cable receiving portion 112 so that both ends of the magnetic core 102 are exposed to the outside. Can be formed.
  • the lower case cover 110b is provided with a coupling protrusion 119 downward, and the coupling protrusion 119 is inserted into the coupling groove 117 of the lower case 110a to cover the lower case 110a.
  • the upper body 120 includes a magnetic core 104, an upper case 120a, and an upper case cover 120b.
  • the magnetic core 104 may be formed in a semicircular shape in the same manner as the magnetic core 102 embedded in the lower body 110.
  • the magnetic core 104 may be inserted into the bobbin 104a having an arc length smaller than the magnetic core 104 so that a part of both ends thereof are exposed to the outside.
  • the coil 105 may be wound on the outer surface of the bobbin 104a so as not to directly contact the magnetic core 104.
  • the bobbins 102a and 104a are used so that the magnetic cores 102 and 104 and the coils 103 and 105 do not have direct contact, and the bobbins 102a and 104a and the magnetic cores 102 and 104 are filled with a molding liquid, thereby making acoustic noise.
  • the waterproof effect can be achieved.
  • the upper case 120a has a core accommodating part 125 for accommodating the magnetic core 104 formed at the center thereof, and a molding hole 126 for inserting a molding member at the upper side of the core accommodating part 125.
  • the molding hole 126 may be penetrated to the outside so that the inside of the split current transformer 100 is exposed.
  • the molding hole 126 may be closed by a cover 126 ′ after molding.
  • Stepped parts 124 having a predetermined height are formed at both sides of the core accommodating part 125, and may be formed to extend from the stepped part 124 so that the connection part 123 protrudes to the outside.
  • the connection part 123 may be formed at a height higher than that of the stepped part 124.
  • the locking ring 121 may be formed at both sides of the upper case 120a in a direction perpendicular to the connection part 123.
  • the upper case cover 120b has a second cable receiving portion 122 formed at the center thereof, and the through holes 128 are disposed at both sides of the second cable receiving portion 122 so that both ends of the magnetic core 104 are exposed to the outside. Can be formed.
  • the upper case cover 120b is provided with a coupling protrusion 129 on the side, and the coupling protrusion 129 is inserted into the coupling groove 127 of the upper case 120a to cover the upper case 120a.
  • the PCB is embedded in the lower case 110a, and both ends of the magnetic core 102 are electrically connected to the PCB through the through hole 117 '.
  • the PCB is equipped with an electronic circuit designed to be easily dismantled when the core is disconnected from the existing line without blocking the current of the line, eliminating the risk factors that may occur when detaching and attaching the electronics required for the sensor and the power supply. Space can be reserved for mounting the circuit.
  • the coil and the stopper are not directly connected, but are connected by using a PCB and then molded through the molding hole 126, thereby preventing defects due to disconnection and short circuits generated in the process of manufacturing the structure of the separate current transformer 100. It can be minimized.
  • the auxiliary adapter 140 is selected according to the standard of the power cable 11, and the main adapter 130 and the auxiliary adapter 140 are mounted on both sides of the lower body 110.
  • the power cable is inserted into the auxiliary adapter 140.
  • the power cable 11 passes through the center of the split current transformer 100.
  • the upper and lower ends are mounted on both sides of the lower body 110 after the main adapter 130 and the auxiliary adapter 140 are mounted on both sides of the upper body 120.
  • the locking means 111 to the locking ring 121 provided on both sides of the upper body 120 can be fixed primarily.
  • the power cable 11 is a separate current transformer. It may be fixed at both ends of the separate current transformer 100 to pass to the center of the (100).
  • the split current transformer 100 is structurally configured so that the power cable naturally passes through the center of the split current transformer 100, and is very easy to install.
  • the constant change rate according to the installation location and specification change of the product, it not only keeps its performance constant, but also makes it easy to periodically calibrate the magnetic core products such as sensors or power supplies. The ease of maintenance of 100) can be improved.
  • the present invention can reduce the measurement error and the number of calibration of the current transformer, it is possible to improve the versatility by applying irrespective of the specification of the power cable, there is industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transformers For Measuring Instruments (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un transformateur de courant séparable. Le transformateur de courant séparable selon un mode de réalisation de la présente invention comprend : un corps inférieur ayant un moyen de verrouillage au niveau de ses deux côtés et ayant une première partie de réception de câble semi-cylindrique au niveau de son centre ; un corps supérieur ayant un anneau de verrouillage correspondant au moyen de verrouillage au niveau de ses deux côtés et ayant une seconde partie de réception de câble semi-cylindrique correspondant à la première partie de réception de câble ; deux paires d'adaptateurs principaux formés en une forme semi-circulaire de manière à s'étendre respectivement depuis la première partie de réception de câble et la seconde partie de réception de câble, ayant une partie de fixation s'étendant depuis ses deux côtés et ayant un trou de fixation formé dans la partie de fixation ; et deux paires d'adaptateurs auxiliaires formés en une forme semi-circulaire formant un cercle concentrique avec le cercle formé par les deux paires respectives d'adaptateurs principaux et ayant un diamètre interne correspondant à la taille d'un câble d'alimentation devant être placé dans la première partie de réception de câble et la seconde partie de réception de câble.
PCT/KR2016/011392 2015-11-16 2016-10-12 Transformateur de courant séparable WO2017086604A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150160586A KR101586785B1 (ko) 2015-11-16 2015-11-16 분리형 변류기
KR10-2015-0160586 2015-11-16

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WO2017086604A1 true WO2017086604A1 (fr) 2017-05-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108597829A (zh) * 2018-07-02 2018-09-28 南京江北自动化技术有限公司 一种可防锈的开合式取能电流互感器
CN113900044A (zh) * 2021-08-20 2022-01-07 伽利略(天津)科技有限公司 一种线缆综合感知装置

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Publication number Priority date Publication date Assignee Title
KR102526397B1 (ko) * 2016-02-22 2023-04-28 주식회사 아모센스 전력 생성용 가변 변류기 모듈
KR102622224B1 (ko) * 2016-08-05 2024-01-08 주식회사 아모센스 변류기
KR101695768B1 (ko) * 2016-11-29 2017-01-13 (주) 웨이브링크 개선된 변류기 및 이를 구비한 전자기 유도 방식의 전원 공급 장치
KR102086653B1 (ko) * 2019-09-04 2020-03-09 주식회사 파워토스 전력선로용 기기의 함체 및 그 설치기구와, 이를 구비한 전력선로용 기기
CN111081465A (zh) * 2019-12-30 2020-04-28 安徽华能集团电器有限公司 一种即插即用式电流互感器

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KR200371971Y1 (ko) * 2004-10-21 2005-01-06 (주)시티이텍 분할형 변류기
JP2010056425A (ja) * 2008-08-29 2010-03-11 Midori Anzen Co Ltd 変流器
JP2012212837A (ja) * 2011-03-30 2012-11-01 Kohshin Electric Corp 分割形変流器
KR101323607B1 (ko) * 2013-05-10 2013-11-01 (주)테라에너지시스템 변류기
KR101456204B1 (ko) * 2013-06-05 2014-10-31 (주)우광테크 계기용 변류기

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Publication number Priority date Publication date Assignee Title
KR200371971Y1 (ko) * 2004-10-21 2005-01-06 (주)시티이텍 분할형 변류기
JP2010056425A (ja) * 2008-08-29 2010-03-11 Midori Anzen Co Ltd 変流器
JP2012212837A (ja) * 2011-03-30 2012-11-01 Kohshin Electric Corp 分割形変流器
KR101323607B1 (ko) * 2013-05-10 2013-11-01 (주)테라에너지시스템 변류기
KR101456204B1 (ko) * 2013-06-05 2014-10-31 (주)우광테크 계기용 변류기

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108597829A (zh) * 2018-07-02 2018-09-28 南京江北自动化技术有限公司 一种可防锈的开合式取能电流互感器
CN113900044A (zh) * 2021-08-20 2022-01-07 伽利略(天津)科技有限公司 一种线缆综合感知装置

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