H02H 1/046
Upon detecting saturation of current transformers
Official title: {upon detecting saturation of current transformers (for differential protection H02H3/283)}
H02H1/046 (Upon detecting saturation of current transformers) appears on 51 US grants and 24 published applications in this corpus.
Search patents in H02H- Granted patents
- 51
- Published applications
- 24
- Assignees
- 37
- Inventors
- 107
- Latest grant
- 21 Nov 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 3 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 2 | 0 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 0 |
| 2015 | 2 | 0 |
| 2016 | 1 | 2 |
| 2017 | 2 | 0 |
| 2018 | 1 | 2 |
| 2019 | 4 | 3 |
| 2020 | 3 | 3 |
| 2021 | 3 | 2 |
| 2022 | 1 | 0 |
| 2023 | 4 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pre-charge current control device21 Nov 2023US 11,824,397 B2Samsung SDI.Co., Ltd.
- Secured fault detection in a power substation15 Aug 2023US 11,728,640 B2Hitachi Energy Switzerland AG
- Network primary feeder self protected transient limiting device18 Jul 2023US 11,705,713 B1
- Detecting and responding to tailgaters23 May 2023US 11,656,623 B1Waymo LLC
- Current sensor output converter for circuit breakers that are configured for Rogowski coils30 Aug 2022US 11,430,624 B2Eaton Intelligent Power Limited
- A fault discrimination and a current transformer saturation detection for a differential protection system25 Jun 2026US 2026/0180308 A1Hitachi Energy Ltd
- Fault current calculation during transformer saturation using the waveform unsaturated region29 Jul 2021US 2021/0231723 A1Schweitzer Engineering Laboratories, Inc.
- Current Sensor Output Converter for Circuit Breakers that are Configured for Rogowski Coils24 Jun 2021US 2021/0193423 A1Eaton Intelligent Power Limited
- Secured fault detection in a power substation12 Nov 2020US 2020/0358283 A1ABB AB
- Pre-charge current control device12 Nov 2020US 2020/0358307 A1Samsung SDI.Co., Ltd.
Most cited
By later US patents
- Overcurrent protection device with visual indicators for trip and programming functions67US 6,055,145 AEaton Corporation · 2000
- System for power transformer differential protection58US 6,356,421 B1Schweitzer Engineering Labs., Inc. · 2002
- Overcurrent protection device51US 5,627,716 AEaton Corporation · 1997
- Instantaneous overcurrent element for heavily saturated current in a power system32US 6,757,146 B2Schweitzer Engineering Laboratories, Inc. · 2004
- Detecting and responding to tailgaters31US 8,818,682 B1Google Inc. · 2014