H02H 3/343
Using phase sequence analysers
Official title: {using phase sequence analysers}
H02H3/343 (Using phase sequence analysers) appears on 38 US grants and 14 published applications in this corpus.
Search patents in H02H- Granted patents
- 38
- Published applications
- 14
- Assignees
- 23
- Inventors
- 57
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 5 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 3 |
| 2021 | 1 | 0 |
| 2022 | 2 | 2 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fault classification and zone identification in a power transmission system15 Apr 2025US 12,278,472 B2Hitachi Energy Ltd
- Protection of low-voltage distribution networks5 Mar 2024US 11,921,170 B2Electronic Sazan Fan Aria Company
- Method for identifying element failure in capacitor banks5 Mar 2024US 11,923,676 B2
- Electric distribution line ground fault prevention systems using dual parameter monitoring with high sensitivity relay devices26 Dec 2023US 11,852,692 B1Milo Group LLC
- Method and apparatus for detecting faults using current unbalance19 Sep 2023US 11,761,994 B2Smart Wires Inc.
- Fault type identification method in electrical power system21 May 2026US 2026/0142452 A1Hitachi Energy Ltd
- Fault classification and zone identification in a power transmission system8 May 2025US 2025/0149874 A1Hitachi Energy Ltd
- Fault classification and zone identification in a power transmission system22 Feb 2024US 2024/0063626 A1Hitachi Energy Switzerland AG
- Method for identifying element failure in capacitor banks16 Feb 2023US 2023/0052911 A1Mho Technologies Corp.
- Protection of low-voltage distribution networks28 Jul 2022US 2022/0236339 A1Electronic Sazan Fan Aria Company
Most cited
By later US patents
- Fault type selection system for identifying faults in an electric power system50US 6,525,543 B1Schweitzer Engineering Laboratories, Inc. · 2003
- Remote protection of three phase distribution transformers32US 4,745,512 AThe Electricity Council · 1988
- Protective relay circuits28US 4,034,269 AGeneral Electric Company · 1977
- Fault identification system for use in protective relays for power transmission lines26US 5,515,227 ASchweitzer Engineering Laboratories, Inc. · 1996
- Method and apparatus for monitoring line voltage in a polyphase source24US 4,210,948 AAllen-Bradley Company, Inc. · 1980