ClassID:

201723

H01F2027/404 - CPC Classification

Classification description:

Details of transformers or inductances, in general; Structural association with built-in electric component, e.g. fuse; Association of measuring or protective means Protective devices specially adapted for fluid filled transformers

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

TRANSFORMER APPARATUS

#2
20250378990
2025-12-11

TECHNOLOGIES FOR PREVENTING THE EXPLOSION OF ELECTRICAL TRANSFORMERS

#3
20250369819
2025-12-04

LEAK DETECTION IN TRANSFORMERS

#4
20250292984
2025-09-18

CURRENT LIMITING FUSE ASSEMBLY, TRANSFORMER ASSEMBLY COMPRISING A CURRENT LIMITING FUSE ASSEMBLY, AND SHIELDING ARRANGEMENT CONFIGURED TO ELECTRICALLY AND MECHANICALLY SHIELD A CURRENT LIMITING FUSE

#5
20250283787
2025-09-11

Dissolved Gas Analysis System and Method

#6
20240412921
2024-12-12

ENHANCED TRANSFORMER FAULT FORECASTING BASED ON DISSOLVED GASES CONCENTRATION AND THEIR RATE OF CHANGE

#7
20240288512
2024-08-29

Transformer Diagnostics System

#8
20240087791
2024-03-14

Electric device comprising liquidfilled tank and cable box with current measuring device

#9
20230326651
2023-10-12

HOUSING PART, ELECTRICAL SYSTEM AND OPERATING METHOD

#10
20230296694
2023-09-21

OPTICAL SENSING METHODS AND SYSTEMS FOR TRANSFORMERS, AND THE CONSTRUCTION THEREOF

#11
20230290559
2023-09-14

PREFABRICATED TRANSFORMER STATION, OIL-IMMERSED TRANSFORMER, AND PHOTOVOLTAIC SYSTEM

#12
20230266378
2023-08-24

Fault gas detection system for a liquid filled high voltage transformer

#13
20230144327
2023-05-11

DISTRIBUTION TRANSFORMER SYSTEM AND METHODS THEREOF

#14
20220270841
2022-08-25

Electrical assembly comprising blown fuse indication system

#15
20220223338
2022-07-14

Isolation apparatus and method of a fault segment in a transformer loop

#16
20220021203
2022-01-20

Apparatus and method for determining transformer state based on correction of dissolved gas data

#17
20210319948
2021-10-14

Expandable turret for electrical equipment

#18
20210270797
2021-09-02

Systems and methods for dissolved gas analysis

#19
20210043373
2021-02-11

Distribution transformer system and methods thereof

#20
20200411233
2020-12-31

Temperature based fluid level estimation in an electrical device

#21
20200209152
2020-07-02

Dissolved gas analysis devices, systems, and methods

#22
20200098513
2020-03-26

Systems and methods for monitoring components in a power transformer or the like

#23
20190206605
2019-07-04

Cover for a distribution transformer filled with a dielectric liquid

#24
20190041446
2019-02-07

Optical sensing methods and systems for transformers, and the construction thereof

#25
20180315546
2018-11-01

Transformer system and system for measuring pressure in a transformer tank

#26
20180259444
2018-09-13

Dissolved gas analysis devices, systems, and methods

#27
20180128673
2018-05-10

Enhanced optical condition monitoring system for power transformer and method for operating power transformer

#28
20180047499
2018-02-15

DISTRIBUTION TRANSFORMER AND INTEGRATED POWER CONDITIONING DEVICE

#29
20170133836
2017-05-11

Method and system for protecting transformers from internal fire

#30
20170011612
2017-01-12

System and method for monitoring and controlling a transformer

#31
20160358736
2016-12-08

FUSE FOR HIGH-VOLTAGE APPLICATIONS

#32
20160322151
2016-11-03

Device comprising a high voltage apparatus including a fluid and equipment for detecting one or more physical properties of the fluid

#33
20160148742
2016-05-26

Burst protector for high-voltage device

#34
20160064142
2016-03-03

TRANSFORMER WITH INTEGRATED FLUID FLOW SENSOR

#35
20150131186
2015-05-14

Safety device for a power transformer, and related power transformer using such a safety device

#36
20140159843
2014-06-12

Immersion cooled inductor apparatus

#37
20130319078
2013-12-05

Sealing apparatus for electrical apparatus oil sampler and conditioner for solid state sensors

#38
20130300525
2013-11-14

Immersion cooled inductor apparatus

#39
20130158897
2013-06-20

System and method for monitoring and controlling a transformer

#40
20120293116
2012-11-22

System and method of filling an air gap between a pair of core sections of a transformer

#41
20120281321
2012-11-08

Disconnector for distribution transformers with dielectric liquid

#42
20120214249
2012-08-23

Optical gas sensor for use with electrical equipment and methods of assembling same

#43
20110291674
2011-12-01

Apparatus and method for analyzing the state of oil-filled electrical devices

#44
20110257924
2011-10-20

SELF-MONITORING AND COMMUNICATING TRANSFORMER

#45
20110246149
2011-10-06

METHOD FOR PREDICTING POSSIBILITY OF OCCURRENCE OF ANOMALY IN OIL-FILLED ELECTRICAL APPARATUS

#46
20110220829
2011-09-15

PRESSURE RELIEF VALVE

#47
20110093216
2011-04-21

Method and device for determining the relative humidity of an insulating liquid filled electric apparatus

#48
20110084716
2011-04-14

Diagnostic method for oil-filled electrical device, diagnostic device for implementing the diagnostic method, and oil-filled electrical device provided with the diagnostic device

#49
20110063064
2011-03-17

POWER TRANSFORMER HAVING A STEPPING SWITCH

#50
20100296205
2010-11-25

System and method for preventing, protecting OLTC from fire and/or transformer from explosion

#51
20100186480
2010-07-29

METHOD AND APPARATUS FOR DETECTING FAULTS IN ELECTRICAL APPARATUS

#52
20090315657
2009-12-24

Cooling system for power transformer

#53
20090231075
2009-09-17

Oil cooling system, particularly for transformers feeding traction electric motors, transformer with said system and method for determining the cooling fluid flow in a cooling system

#54
20090205720
2009-08-20

Burst Disc Replacement Apparatus

#55
20090072940
2009-03-19

System for preventing rupture of transformer tank

#56
20090043538
2009-02-12

Method and system for transformer dissolved gas harmonic regression analysis

#57
20080196920
2008-08-21

Expansion Vessel for Stepping Switches

#58
20080186641
2008-08-07

Method and device for prevention and protection of electrical transformer against explosion and fire

#59
20060250683
2006-11-09

Transformer temperature monitoring and control

#60
20060201264
2006-09-14

Transformer monitoring system

#61
20050223782
2005-10-13

Transformer monitoring system

#62
20050133094
2005-06-23

Enclosure system for pressure relief device

#63
18677446
2025-12-02

Leak detection in transformers

#64
18384731
2024-04-09

Method for generating object detector based on deep learning capable of detecting extended object class and detector generation device using the same