H01H 33/26
Means for detecting the presence of an arc or other discharge
H01H33/26 (Means for detecting the presence of an arc or other discharge) appears on 56 US grants and 45 published applications in this corpus.
Search patents in H01H- Granted patents
- 56
- Published applications
- 45
- Assignees
- 41
- Inventors
- 164
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 2 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 7 |
| 2015 | 7 | 3 |
| 2016 | 3 | 0 |
| 2017 | 3 | 5 |
| 2018 | 1 | 3 |
| 2019 | 4 | 1 |
| 2020 | 2 | 1 |
| 2021 | 3 | 7 |
| 2022 | 5 | 0 |
| 2023 | 1 | 1 |
| 2024 | 2 | 1 |
| 2025 | 1 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High voltage DC contactor isolation via electromechanical actuation10 Mar 2026US 12,573,570 B2Hamilton Sundstrand Corporation
- Temperature sensor for arc detection27 May 2025US 12,316,090 B2Pratt & Whitney Canada Corp.
- Enabling equipment to withstand and control the effects of internal arcing faults20 Feb 2024US 11,908,645 B2Powell Electrical Systems, Inc.
- Electrocaloric heat transfer system2 Jan 2024US 11,859,878 B2Carrier Corporation
- Sensing arrangement8 Aug 2023US 11,719,737 B2ABB Schweiz AG
- Apparatus, system, and method for providing event indication22 May 2025US 2025/0167536 A1Schneider Electric USA, Inc.
- High voltage dc contactor isolation via electromechanical actuation3 Apr 2025US 2025/0112011 A1Hamilton Sundstrand Corporation
- Switching device6 Feb 2025US 2025/0046547 A1Mitsubishi Electric Corporation
- Temperature sensor for arc detection12 Sep 2024US 2024/0305085 A1Pratt & Whitney Canada Corp.
- Enabling equipment to withstand and control the effects of internal arcing faults22 Jun 2023US 2023/0197377 A1Powell Electrical Systems, Inc.
Most cited
By later US patents
- Arcing fault protection system for a switchgear enclosure127US 6,141,192 ASquare D Company · 2000
- Arcing fault protection system for a switchgear enclosure60US 5,933,308 ASquare D Company · 1999
- Partial discharge monitoring system for transformers45US 6,774,639 B1TransGrid · 2004
- Vacuum circuit-breaker equipped with self-diagnosis means44US 5,286,933 AGEC Alsthom SA · 1994
- Arrangement for testing metal-clad, high-voltage installations28US 3,939,410 ASiemens Aktiengesellschaft · 1976