H02H 1/003
Fault detection by injection of an auxiliary voltage
Official title: {Fault detection by injection of an auxiliary voltage (same for detection of earth fault currents H02H3/17; for monitoring earth connection H02H5/105)}
H02H1/003 (Fault detection by injection of an auxiliary voltage) appears on 90 US grants and 99 published applications in this corpus.
Search patents in H02H- Granted patents
- 90
- Published applications
- 99
- Assignees
- 82
- Inventors
- 203
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 4 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 4 |
| 2014 | 1 | 4 |
| 2015 | 2 | 8 |
| 2016 | 3 | 7 |
| 2017 | 10 | 7 |
| 2018 | 6 | 7 |
| 2019 | 7 | 7 |
| 2020 | 5 | 9 |
| 2021 | 12 | 6 |
| 2022 | 4 | 6 |
| 2023 | 8 | 7 |
| 2024 | 7 | 4 |
| 2025 | 3 | 8 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fault clearing in electrical systems with injected signal15 Sep 2026US 12,738,735 B2Hamilton Sundstrand Corporation
- Systems and methods for electrical power delivery with fault management13 Jan 2026US 12,523,692 B2AcLeap Power Inc.
- Methods and systems for fault detection on direct current power lines16 Dec 2025US 12,498,431 B2Cence Power Inc.
- System and method for grounded-neutral fault detection13 May 2025US 12,298,356 B2ABB Schweiz AG
- Short detection circuit25 Mar 2025US 12,261,429 B2Texas Instruments Incorporated
- Overcurrent Protection for Bidirectional Power Semiconductor Devices20 Aug 2026US 2026/0246262 A1Ideal Power Inc.
- Failure detection system and method21 May 2026US 2026/0140227 A1NXP B. V.
- Methods and systems for fault detection on direct current power lines12 Mar 2026US 2026/0072102 A1Cence Power Inc.
- System and Method for Locating Remote Earth Fault Section in Power Grids26 Feb 2026US 2026/0056239 A1Winter Brothers AB
- Detecting apparatus for circuit breaker and circuit breaker8 Jan 2026US 2026/0011998 A1Schneider Electric Industries SAS
Most cited
By later US patents
- Ground monitoring system48US 4,321,643 AAMF Incorporated · 1982
- Ground conductor monitoring system and method38US 4,075,675 AGenoa Coal Company · 1978
- Ground integrity monitor for electrical apparatus29US 3,996,496 ABorg-Warner Corporation · 1976
- Anti-islanding detection scheme for distributed power generation23US 6,603,290 B2Visteon Global Technologies, Inc. · 2003
- Ground monitoring system and method22US 4,153,923 A1979