ClassID:

201777

H01F38/30 - CPC Classification

Classification description:

Adaptations of transformers or inductances for specific applications or functions; Instruments transformers for single phase ac; Current transformers Constructions

Sub-classes:
Recent Application in this class:
#1
20260135029
2026-05-14

CIRCUIT BREAKER DEVICE WITH CURRENT SENSE TRANSFORMERS HAVING PRIMARY WINDING TURNS IN OPPOSING DIRECTIONS

#2
20250322988
2025-10-16

CURRENT TRANSFORMER POLARITY VERIFICATION

#3
20250199035
2025-06-19

CURRENT SENSOR WITH ADJACENT CONDUCTOR REJECTION

#4
20250199034
2025-06-19

FAULT CURRENT SENSOR WITH ADJACENT PHASE FAULT IMMUNITY

#5
20250166888
2025-05-22

CURRENT TRANSFORMER

#6
20250111992
2025-04-03

SWITCH CURRENT SENSORS

#7
20250095899
2025-03-20

CT ENERGY EXTRACTION DEVICE

#8
20250079071
2025-03-06

MAGNETIC SHIELDING SYSTEM FOR A DIFFERENTIAL CURRENT TRANSFORMER IN A CIRCUIT BREAKER TO PROVIDE SHIELDING AT MULTIPLE LOCATIONS

#9
20250076346
2025-03-06

APPARATUS AND METHOD FOR EMBEDDING CURRENT MEASUREMENT AND RINGING SUPPRESSION IN MULTICHIP MODULES

#10
20250035674
2025-01-30

ROGOWSKI COIL WITH CALIBRATION UNIT

#11
20240329092
2024-10-03

Current Sensing Device

#12
20240321513
2024-09-26

INTEGRATED CIRCUIT HAVING CURRENT-SENSING COIL

#13
20240312702
2024-09-19

CIRCUIT BREAKER DEVICE WITH PRIMARY WINDING TURNS IN OPPOSING DIRECTIONS

#14
20240151747
2024-05-09

Apparatus and method for embedding current measurement and ringing suppression in multichip modules

#15
20240047134
2024-02-08

High-voltage column current transformer

#16
20240027500
2024-01-25

Rogowski coil positioning and retaining apparatus

#17
20230417801
2023-12-28

ENERGY HARVEST SPLIT CORE DESIGN ELEMENTS FOR EASE OF INSTALLATION, HIGH PERFORMANCE, AND LONG TERM RELIABILITY

#18
20230384351
2023-11-30

Electric current sensor

#19
20230298811
2023-09-21

CURRENT TRANSFORMER

#20
20230223189
2023-07-13

HV APPARATUS AND A METHOD OF MANUFACTURING SUCH APPARATUS

#21
20230213558
2023-07-06

Apparatus and tool for a measurement coil

#22
20230154675
2023-05-18

Integrated circuit having current-sensing coil

#23
20230127478
2023-04-27

SINGLE PACKAGE, DUAL CURRENT TRANSFORMER FOR LOAD AND RESIDUAL CURRENT MEASUREMENT

#24
20230110022
2023-04-13

Polymeric mounting suspension for a split core current transformer

#25
20230077845
2023-03-16

Current transformer with test wire

#26
20230065839
2023-03-02

DISPLAY DEVICE COMPRISING TRANSFORMER COMPRISING CORE HAVING STRUCTURE RELATED WITH COUPLING FACTOR OF INDUCTOR

#27
20230008982
2023-01-12

Single-Event Transient (SET) Pulse Measuring Circuit Capable of Eliminating Impact Thereof, and Integrated Circuit Chip

#28
20220344095
2022-10-27

Bushing-type current transformer, and switchboard having current transformer applied thereto

#29
20220308093
2022-09-29

Electrical current measurement system, and diagnostic system

#30
20220285090
2022-09-08

CURRENT TRANSFORMER MODULE

#31
20220262557
2022-08-18

Current transformer module

#32
20220113337
2022-04-14

Rogowski coil positioning and retaining apparatus

#33
20220044869
2022-02-10

Current transformer of air circuit breaker

#34
20210335531
2021-10-28

INDEPENDENT TYPE INSTANTANEOUS CURRENT DETECTION PCB CT DEVICE APPLIED TO BREAKER

#35
20210265110
2021-08-26

CURRENT TRANSFORMER

#36
20210193375
2021-06-24

Current converter with fluid or oil paper insulation for high voltage

#37
20210175007
2021-06-10

Measuring method and high-voltage transducer with clean air

#38
20210166869
2021-06-03

Self calibration by signal injection

#39
20210165066
2021-06-03

Self calibration by double signal sampling

#40
20210141003
2021-05-13

Energy harvest split core design elements for ease of installation, high performance, and long term reliability

#41
20210104846
2021-04-08

Power connector with integrated power monitoring

#42
20210104360
2021-04-08

Integrated circuit having current-sensing coil

#43
20210065972
2021-03-04

Switchboard including current transformer

#44
20210065971
2021-03-04

Openable current transformer comprising a flexible magnetic core

#45
20210057986
2021-02-25

Apparatus and method for embedding current measurement and ringing suppression in multichip modules

#46
20210041484
2021-02-11

Current converter

#47
20210018539
2021-01-21

Current detection device having a current transformer with a common coil section

#48
20200388436
2020-12-10

Air-core inductor assembly

#49
20200373078
2020-11-26

Method of manufacturing a current transformer

#50
20200286681
2020-09-10

Current transformer

#51
20200243256
2020-07-30

Transformer arrangement, circuit arrangement and method for operating a transformer arrangement

#52
20200243229
2020-07-30

Toroidal microinductor comprising a nanocomposite magnetic core

#53
20200241051
2020-07-30

System and method for energy sensing and harvesting with fault detection

#54
20200219642
2020-07-09

High-voltage device having ceramic spacer elements, and use thereof

#55
20200116762
2020-04-16

Current sensing device

#56
20200111595
2020-04-09

Losses reduction for electrical power distribution

#57
20200051738
2020-02-13

Current Transformer with Current Branches on Primary Conductor

#58
20190324075
2019-10-24

MONITORING SERVICE CURRENT FOR ARC FAULT DETECTION IN ELECTRICAL BRANCH CIRCUITS

#59
20190290351
2019-09-26

Electrosurgical generators and sensors

#60
20190287718
2019-09-19

Phase and zero-sequence current sensing modules mounted together on a cable bushing

#61
20190280437
2019-09-12

Power connector with integrated power monitoring

#62
20190277893
2019-09-12

Heat-resistance element for current detection

#63
20190214178
2019-07-11

Losses reduction for electrical power distribution

#64
20190198241
2019-06-27

HV apparatus and a method of manufacturing such apparatus

#65
20190180932
2019-06-13

Core for current transformer

#66
20190156998
2019-05-23

Current transformer module and power supply device including the same

#67
20190122813
2019-04-25

Current transformer with flexible secondary winding

#68
20190113547
2019-04-18

Current measurement device, manufacturing method, protection module and differential circuit breaker including such a device

#69
20190057811
2019-02-21

Electromagnetic energy harvester for aircraft applications

#70
20190035590
2019-01-31

Differential electrical protection device that measures a differential current over a plurality of phase conductors

#71
20190033346
2019-01-31

Core member, gapped core, current sensor, and method for manufacturing gapped core

#72
20190033345
2019-01-31

Current measuring device protected against electrical surges when opening the circuit

#73
20180366265
2018-12-20

Magnetic-shield-type converter

#74
20180350517
2018-12-06

Inductive current transformer for transmitting information using current modulation

#75
20180330865
2018-11-15

Gapped resonant current transformer

#76
20180286564
2018-10-04

POWER CONVERTER MODULE

#77
20180164346
2018-06-14

Rogowski current with active capacitance compensation

#78
20180152096
2018-05-31

Transformer including a current induction device having an amplifier circuit

#79
20180145162
2018-05-24

IGBT die structure with auxiliary P well terminal

#80
20180120358
2018-05-03

CURRENT SENSOR

#81
20180115121
2018-04-26

Plug socket with current transformer

#82
20180090267
2018-03-29

Current transformer and direct current source based on current transformer

#83
20180075962
2018-03-15

Top head housing

#84
20180019057
2018-01-18

In-situ wound current transformer core

#85
20180019053
2018-01-18

Inductor module and electric power transmission system

#86
20180017600
2018-01-18

E-pin attached current measurement coil

#87
20180017599
2018-01-18

Current detection element including a coil-shaped current detection conductor, transmission device, and electric power transmission system

#88
20170331233
2017-11-16

Power connector with integrated power monitoring

#89
20170316877
2017-11-02

Expandable and flexible terminal assembly

#90
20170264111
2017-09-14

Electric storage apparatus, electronic device, electric vehicle, and electric power system

#91
20170229236
2017-08-10

Current transformer

#92
20170201185
2017-07-13

Apparatus and method for transforming alternating electrical energy

#93
20170186532
2017-06-29

Current Transformer

#94
20170169943
2017-06-15

Correlation-evading commutated-element direct-current current transformer

#95
20170117080
2017-04-27

Support device of an active part of a current transformer

#96
20160351326
2016-12-01

Inductor

#97
20160294448
2016-10-06

Wireless batteryless data processing unit

#98
20160268042
2016-09-15

Integrated circuit having current-sensing coil

#99
20160231362
2016-08-11

Clip-on current transducer or current transformer

#100
20160225520
2016-08-04

DEVICE AND METHOD FOR RELEASING A MAGNETIC CORE MOUNTED AROUND A CURRENT CARRYING ELECTRIC CONDUCTOR

#101
20160187387
2016-06-30

Electrical current transducer with wound magnetic core

#102
20160178661
2016-06-23

Device comprising elements for measuring current and process for manufacturing such a device

#103
20160154027
2016-06-02

Electrical current transducer

#104
20160154026
2016-06-02

Electrical current transducer with electrostatic shield

#105
20160151109
2016-06-02

Electrosurgical generators and sensors

#106
20160118175
2016-04-28

Converter unit, particularly a combination converter

#107
20160116625
2016-04-28

Downhole device having a toroidal coil with flat metallic strip

#108
20160116505
2016-04-28

Energy harvest split core design elements for ease of installation, high performance, and long term reliability

#109
20160084888
2016-03-24

Closure for measuring voltage on power-carrying conductors

#110
20160077133
2016-03-17

ROGOWSKI COIL AND CURRENT MEASUREMENT SENSOR INCLUDING THE SAME

#111
20150377930
2015-12-31

Neutral pole current transformer module for circuit breaker and neutral pole current detecting apparatus for circuit breaker

#112
20150348704
2015-12-03

0.2Ss class special-type high-voltage measuring current transformer

#113
20150206645
2015-07-23

Split core current transformer

#114
20150138347
2015-05-21

Portable self powered line mounted high speed camera system for overhead electric power lines

#115
20150130288
2015-05-14

Power reception device and power transmission device

#116
20150091605
2015-04-02

Portable self powered line mountable electric power line current monitoring transmitting and receiving system

#117
20150054610
2015-02-26

Sensing transformer with pivotable and rotatable split cores

#118
20150054609
2015-02-26

Split core transformer with self-aligning cores

#119
20140375302
2014-12-25

Automatic switchable low threshold current power supply

#120
20140347037
2014-11-27

Adjustable overhead conductor monitoring device

#121
20140333293
2014-11-13

Current sensor

#122
20140327305
2014-11-06

Phase balancing of power transmission system

#123
20140306732
2014-10-16

Detection of defective electrical connections

#124
20140300350
2014-10-09

Electrical current transducer

#125
20140210463
2014-07-31

Current sensor and printed circuit board for this sensor

#126
20140179174
2014-06-26

Fixed tap low threshold current power supply

#127
20140177672
2014-06-26

Portable self powered line mountable device for measuring and transmitting the undisturbed conductor temperature of electric power line conductors

#128
20140176702
2014-06-26

Portable self powered line mounted high speed camera system for overhead electric power lines

#129
20140176276
2014-06-26

Switchable low threshold current power supply

#130
20140176275
2014-06-26

Automatic switchable low threshold current power supply

#131
20140176164
2014-06-26

Portable self powered line mounted device and method for measuring the voltage of electric power line conductors

#132
20140176161
2014-06-26

Portable self powered line mountable device for measuring and transmitting relative humidity

#133
20140176155
2014-06-26

Portable self powered line mountable device for measuring and transmitting solar radiation

#134
20140176122
2014-06-26

Portable self powered line mountable device for measuring and transmitting ambient temperature

#135
20140176121
2014-06-26

Portable self powered line mountable electric power line current monitoring transmitting and receiving system

#136
20140174260
2014-06-26

Hotstick assembly for installing and removing devices from high voltage energized overhead power lines

#137
20140174170
2014-06-26

Portable self powered line mounted conductor ice thickness measuring system for overhead electric power lines

#138
20140173891
2014-06-26

Portable self powered line mountable electric power line and environment parameter monitoring transmitting and receiving system

#139
20140132249
2014-05-15

Mixed current sensor and method for fitting said sensor

#140
20140118055
2014-05-01

IGBT die structure with auxiliary P well terminal

#141
20140111190
2014-04-24

Current detection device and electricity meter

#142
20140097924
2014-04-10

Current transformer

#143
20140028287
2014-01-30

Current transformer

#144
20140021936
2014-01-23

HIGH EFFICIENCY ENERGY HARVESTER AND METHODS THEREOF

#145
20140009253
2014-01-09

CURRENT TRANSFORMER

#146
20130314083
2013-11-28

Mixed current sensor and method for fitting said sensor

#147
20130307526
2013-11-21

Sensor device and method of manufacture and use

#148
20130292151
2013-11-07

Apparatus for detachable attachment of an electrical conductor to a current transformer housing

#149
20130240248
2013-09-19

Device for detachably fixing a current conductor to a current transformer housing

#150
20130234722
2013-09-12

High sensitivity differential current transformer for insulation health monitoring

#151
20130214765
2013-08-22

Multifunctional measuring device

#152
20130207638
2013-08-15

Combination converter arrangement and switching device

#153
20130193987
2013-08-01

Device for measuring electrical current and method of manufacturing the same

#154
20130183043
2013-07-18

Apparatus for employing low ohmic alloy conductors and method for simplifying current drain data retrieval

#155
20130154629
2013-06-20

Toroidal fluxgate current transducer

#156
20130135776
2013-05-30

Current transformer arrangement

#157
20130127581
2013-05-23

Current transformer

#158
20130076389
2013-03-28

Current transformer assembly for use with electrical monitoring systems and methods of assembling same

#159
20130049457
2013-02-28

Electric storage apparatus, electronic device, electric vehicle, and electric power system including a magnetic core

#160
20130027818
2013-01-31

Transformer instrumentation and metering system

#161
20130027162
2013-01-31

Miniature Neutral Toroidal Current Transformer

#162
20130015934
2013-01-17

Translatory fastening element for detachably fastening a current conductor to a current transformer housing

#163
20120326823
2012-12-27

Looped fastening element for removably fixing a conductor to a current transformer housing

#164
20120322284
2012-12-20

Pivotable device for a detachably fastening a conductor on a transformer housing

#165
20120315778
2012-12-13

DEVICE FOR REMOVABLY FIXING A CONDUCTOR TO A CURRENT TRANSFORMER HOUSING

#166
20120268106
2012-10-25

Smart current transformers

#167
20120243140
2012-09-27

Circuit protection device for use in medium and high voltage environments

#168
20120229122
2012-09-13

Current input converter

#169
20120217963
2012-08-30

MAGNETIC CORE, CURRENT SENSOR PROVIDED WITH THE MAGNETIC CORE, AND CURRENT MEASURING METHOD

#170
20120146661
2012-06-14

FAULT INDICATOR CAPACTIVE POWER SOURCE

#171
20120126787
2012-05-24

Magnetic shield for current transformer in electronic watt-hour meter

#172
20120092115
2012-04-19

CURRENT TRANSFORMER

#173
20120039062
2012-02-16

Ajustable overhead conductor monitoring device

#174
20120039061
2012-02-16

Apparatus and method for mounting an overhead device

#175
20120038446
2012-02-16

Apparatus and method for mounting an overhead monitoring device

#176
20120013331
2012-01-19

Method for producing a current metering device

#177
20110287226
2011-11-24

Electrically Insulating Body

#178
20110279942
2011-11-17

Surge current sensor and surge protection system including the same

#179
20110260824
2011-10-27

Transformer

#180
20110242720
2011-10-06

Magnetic core coupling in a current transformer with integrated magnetic actuator

#181
20110121932
2011-05-26

Combination wire connector and current transformer

#182
20110121821
2011-05-26

MAGNETIC CORE FOR ELECTRIC CURRENT SENSORS

#183
20110116197
2011-05-19

Current sensor for earth leakage module

#184
20110115596
2011-05-19

Current transformer

#185
20110095858
2011-04-28

CONVERTER ARRANGEMENT

#186
20110074397
2011-03-31

Monitoring system and current transformers for partial discharge detection

#187
20110043190
2011-02-24

ROGOWSKI COIL, MEDIUM VOLTAGE ELECTRICAL APPARATUS INCLUDING THE SAME, AND METHOD OF PROVIDING ELECTROSTATIC SHIELDING FOR A ROGOWSKI COIL

#188
20110040506
2011-02-17

Module for measuring the current flowing in a conductor distribution of a low-voltage distribution board

#189
20110025305
2011-02-03

Current sensing inductive devices

#190
20110025304
2011-02-03

Current sensing devices and methods

#191
20110006755
2011-01-13

High sensitivity differential current transformer for insulation health monitoring

#192
20100315095
2010-12-16

CURRENT TRANSFORMER AND ELECTRICAL MONITORING SYSTEM

#193
20100301980
2010-12-02

Current transformer, protection device including such transformer and related circuit breaker

#194
20100265630
2010-10-21

Relay with current transformer

#195
20100253318
2010-10-07

HIGH VOLTAGE TO LOW VOLTAGE INDUCTIVE POWER SUPPLY WITH CURRENT SENSOR

#196
20100231200
2010-09-16

Electrical coil and manufacturing process therefor

#197
20100182117
2010-07-22

High Frequency Magnetic Current Transducer

#198
20100157490
2010-06-24

LEAKAGE CURRENT PROTECTION DEVICE

#199
20100148907
2010-06-17

CURRENT TRANSFORMER AND ELECTRICAL MONITORING SYSTEM

#200
20100148901
2010-06-17

Current sensor assembly

#201
20100090678
2010-04-15

Method for producing an electricity sensing device

#202
20100073898
2010-03-25

Current transformer support bracket and circuit interrupter including the same

#203
20100039738
2010-02-18

Inductive coupler for power line communications, having a member that provides an intended path for a flashover to discharge to ground

#204
20090261813
2009-10-22

Current sensor

#205
20090256580
2009-10-15

Orthogonal radio frequency voltage/current sensor with high dynamic range

#206
20090230948
2009-09-17

Rogowski coil assembly and methods

#207
20090184705
2009-07-23

Magnetic core for current transformer, current transformer, and watt-hour meter

#208
20090146771
2009-06-11

Apparatus for Generating Secondary Electricity from an Electromagnetic Field Around a Wire

#209
20090115403
2009-05-07

Split core status indicator

#210
20090109632
2009-04-30

Current transformer disconnect switch

#211
20090039868
2009-02-12

Current sensor with a magnetic structure for measuring an electrical current on an electrical conductor

#212
20090021237
2009-01-22

Current transformer and electric energy meter

#213
20090009274
2009-01-08

Short-circuit indicator for electrical lines for power distribution

#214
20080232007
2008-09-25

Leakage current protection device

#215
20080211484
2008-09-04

Flexible current transformer assembly

#216
20080174320
2008-07-24

PARTIAL DISCHARGE SENSOR AND PARTIAL DISCHARGE MONITORING SYSTEM UTILIZING CURRENT SENSORS

#217
20080129437
2008-06-05

Current transformer core, current transformer and power meter

#218
20080106254
2008-05-08

Split Rogowski coil current measuring device and methods

#219
20080106253
2008-05-08

Shielded Rogowski coil assembly and methods

#220
20080092366
2008-04-24

Current transformer cores formed from magnetic iron-based alloy including final crystalline particles and method for producing same

#221
20080048815
2008-02-28

Inductive component and method for the manufacture of such a component

#222
20080012677
2008-01-17

Circuit breaker-like apparatus with combination current transformer

#223
20070285201
2007-12-13

Induction coupling apparatus

#224
20070126546
2007-06-07

Current transformer core and method for producing a current transformer core

#225
20070109088
2007-05-17

Snap-On Parasitic Power Line Transformer

#226
20070103163
2007-05-10

Inverter system

#227
20070103094
2007-05-10

Anomaly detection in inverter system

#228
20070086131
2007-04-19

Current transformer including a low permeability shunt and a trip device employing the same

#229
20070025065
2007-02-01

Mounting structure for current sensor

#230
20060290454
2006-12-28

Measuring device for measuring differential current, trip module comprising one such measuring device and switchgear unit having one such module

#231
20060261920
2006-11-23

Inductive coupler for power line communications

#232
20060255793
2006-11-16

Current sensor for measuring an electrical current in a circuit having a plurality of electrical conductors

#233
20060175087
2006-08-10

Electronic device comprising a housing

#234
20060066425
2006-03-30

Multi-phase electromagnetic relay assembly and motor assembly

#235
20060006976
2006-01-12

Split core sensing transformer

#236
20050219028
2005-10-06

Transformers

#237
20050190032
2005-09-01

Compact current transformer casing for gas-insulated switchgear assemblies

#238
20050141159
2005-06-30

Device for supplying an electronic protection device to be used in a low-voltage circuit breaker

#239
20050134290
2005-06-23

Current transformers for partial discharge detection on aircraft cables and wires

#240
20050030146
2005-02-10

Flux coil system

#241
20050022377
2005-02-03

Method for attaching and for ensuring orientation of components

#242
20050001706
2005-01-06

Low power consuming current measurements for high currents

#243
17692734
2024-03-26

Electrical power distribution and monitoring system for data