ClassID:

201699

H01F27/321 - CPC Classification

Classification description:

Details of transformers or inductances, in general; Coils; Windings; Conductive connections; Insulating of coils, windings, or parts thereof using a fluid for insulating purposes only

Recent Application in this class:
#1
20260094758
2026-04-02

TRANSFORMER APPARATUS

#2
20260045406
2026-02-12

TRANSFORMER ARRANGEMENT

#3
20250283749
2025-09-11

TRANSFORMER OIL-LEVEL MONITORING AND EARLY WARNING SYSTEM

#4
20250259784
2025-08-14

A WINDING, A TRANSFORMER AND A TRANSFORMER ARRANGEMENT

#5
20250118485
2025-04-10

A TRANSFORMER ARRANGEMENT

#6
20250111988
2025-04-03

A TRANSFORMER ARRANGEMENT

#7
20240355538
2024-10-24

THE INSULATING GAS MIXTURE FOR REPLACING SF6, AS WELL AS ITS FORMULATION METHOD AND APPLICATION

#8
20240274349
2024-08-15

Transformer and a transformer arrangement

#9
20240258024
2024-08-01

WIRELESS TRANSMISSIONS THROUGH A TRANSFORMER TANK

#10
20240221997
2024-07-04

INSTRUMENT TRANSFORMER

#11
20230360835
2023-11-09

Compact outdoor open-close type current transformer

#12
20230352216
2023-11-02

Power equipment and associated manufacturing method

#13
20230326649
2023-10-12

ELECTRICAL DEVICE HAVING A TANK WITH A CONVEX BULGING PORTION

#14
20230317380
2023-10-05

On-load tap changer

#15
20230230759
2023-07-20

ELECTRICAL APPLIANCE WITH MECHANICAL DECOUPLING BETWEEN THE ACTIVE PART AND BOILER

#16
20230223189
2023-07-13

HV APPARATUS AND A METHOD OF MANUFACTURING SUCH APPARATUS

#17
20230147165
2023-05-11

WIRELESS TRANSMISSIONS THROUGH A TRANSFORMER TANK

#18
20230131583
2023-04-27

METHOD AND SYSTEM FOR BREATHER HEALTH ASSESSMENT FOR A TRANSFORMER BREATHER

#19
20230121933
2023-04-20

MFC in pressboards for HV devices

#20
20230063023
2023-03-02

SYSTEM AND METHOD FOR PREDICTING REMAINING USEFUL LIFE OF TRANSFORMER

#21
20230016771
2023-01-19

MEDIUM FREQUENCY TRANSFORMER WITH PARALLEL WINDINGS

#22
20230011472
2023-01-12

TRANSFORMER ARRANGEMENT AND METHOD FOR ELECTRICALLY CONNECTING AND DISCONNECTING A TRANSFORMER

#23
20220415535
2022-12-29

DIELECTRIC FLUID FOR TRANSFORMER RETROFILLING

#24
20220319770
2022-10-06

INSTRUMENT TRANSFORMER AND METHOD TO ISOLATE PARTS

#25
20220254564
2022-08-11

METHOD FOR MEASURING A QUANTITY OF LIQUID IN A LIQUID-INSULATED ELECTRICAL COMPONENT, LIQUID-INSULATED ELECTRICAL COMPONENT AND RAILROAD VEHICLE HAVING THE SAME

#26
20210217552
2021-07-15

Inductor

#27
20210193375
2021-06-24

Current converter with fluid or oil paper insulation for high voltage

#28
20210175007
2021-06-10

Measuring method and high-voltage transducer with clean air

#29
20210043370
2021-02-11

Tank for liquid-filled shell transformers or shell reactors

#30
20210012941
2021-01-14

Transformer

#31
20200326364
2020-10-15

Method of Diagnosing Oil-Immersed Electrical Apparatus

#32
20190353136
2019-11-21

Igniter assembly with improved insulation and method of insulating the igniter assembly

#33
20190348213
2019-11-14

PLANAR TRANSFORMER, LASER DIODE-DRIVING POWER SUPPLY, AND LASER MACHINING APPARATUS

#34
20190198241
2019-06-27

HV apparatus and a method of manufacturing such apparatus

#35
20190136273
2019-05-09

Microbial oils with lowered pour points, dielectric fluids produced therefrom, and related methods

#36
20190128749
2019-05-02

Temperature estimation method

#37
20190088411
2019-03-21

Three-phase transformer

#38
20190067918
2019-02-28

Device for the generation, transmission, distribution and/or use of electrical energy or component of such a device and gas seal for such a device or component

#39
20190035516
2019-01-31

Pluggable high-voltage bushing and high-voltage installation having the pluggable high-voltage bushing

#40
20190019611
2019-01-17

Three-phase reactor

#41
20180274514
2018-09-27

Igniter assembly with improved insulation and method of insulating the igniter assembly

#42
20180259444
2018-09-13

Dissolved gas analysis devices, systems, and methods

#43
20180158596
2018-06-07

Transformer arrangement and method for controlling pressure in a liquid-filled transformer

#44
20180047499
2018-02-15

DISTRIBUTION TRANSFORMER AND INTEGRATED POWER CONDITIONING DEVICE

#45
20170323720
2017-11-09

Methods to spray paint on a body of an inductor

#46
20170278616
2017-09-28

Gas-insulated electrical apparatus, in particular gas-insulated transformer or reactor

#47
20170186532
2017-06-29

Current Transformer

#48
20170149226
2017-05-25

Gas insulation device

#49
20170148563
2017-05-25

Electrical device comprising a gas-insulated apparatus, in particular a gas-insulated transformer or reactor

#50
20170141548
2017-05-18

Subsea power distribution device and system

#51
20160376617
2016-12-29

Microbial oils with lowered pour points, dielectric fluids produced therefrom, and related methods

#52
20160300656
2016-10-13

Enclosure for voltage transformer and corresponding voltage transformer

#53
20160247628
2016-08-25

Subsea transformer with seawater high resistance ground

#54
20150371730
2015-12-24

Electrical insulating paper and stationary induction electrical apparatus using the same

#55
20150061803
2015-03-05

Transformer chamber for a wind turbine

#56
20140159846
2014-06-12

Medium frequency transformer

#57
20130058070
2013-03-07

Transformer chamber for a wind turbine, wind turbine structure component, wind turbine, and method for assembling a wind turbine

#58
20120176724
2012-07-12

Corona igniter including ignition coil with improved isolation

#59
20120146754
2012-06-14

Power distribution transformer and tank therefor

#60
20120119862
2012-05-17

Microbial oils with lowered pour points, dielectric fluids produced therefrom, and related methods

#61
20120085735
2012-04-12

Gas insulation apparatus

#62
20110148433
2011-06-23

High-voltage transformer

#63
20110043313
2011-02-24

Power distribution transformer and tank therefor

#64
20110037551
2011-02-17

Oil filled transformer with spacers and spacers for separating and supporting stacked windings

#65
20100277886
2010-11-04

Power transformer/reactor

#66
20100097167
2010-04-22

Vegetable oil based dielectric coolant

#67
20090072940
2009-03-19

System for preventing rupture of transformer tank

#68
20080197977
2008-08-21

Stationary induction apparatus and monitoring device thereof

#69
20070295692
2007-12-27

Fault tolerant high voltage switching elements and electrical components

#70
20070222546
2007-09-27

High performance dielectric oil and the use thereof in high voltage electrical equipment

#71
20070199443
2007-08-30

Method for dehumidifying air and air dehumidifier for oil-insulated transformers, reactance coils and step switches

#72
20070159743
2007-07-12

Electrical equipment for distribution network

#73
20060151191
2006-07-13

Power distribution transformer and tank therefor

#74
20060103498
2006-05-18

Spool assembly

#75
20050083160
2005-04-21

Insulation system for oil filled environments

#76
20050040375
2005-02-24

Vegetable oil based dielectric fluid and methods of using same

#77
15782152
2019-02-26

Liquid containment device for bushing in liquid filled transformer