Protection circuit for a three-phase power supply system
US-2025373003-A1 · Dec 4, 2025 · US
of a three-phase system
of a three-phase system · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02H3/34 |
| Official title | of a three-phase system |
| Display label | of a three-phase system |
| Total patents | 51 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 7 |
| 2018 | 4 |
| 2019 | 2 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 4 |
| 2025 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fault classification and zone identification in a power transmission system
US-2025149874-A1 · May 8, 2025 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-2025141209-A1 · May 1, 2025 · US
Fault classification and zone identification in a power transmission system
US-12278472-B2 · Apr 15, 2025 · US
Method for protecting a microgrid from a voltage drop or sag occurring in a main grid connected to said microgrid
US-2025105631-A1 · Mar 27, 2025 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-12191653-B2 · Jan 7, 2025 · US
Open-phase detection circuit and power conversion apparatus
US-12140613-B2 · Nov 12, 2024 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-2024170948-A1 · May 23, 2024 · US
Fault classification and zone identification in a power transmission system
US-2024063626-A1 · Feb 22, 2024 · US
Common mode voltage feed fault protection
US-11881708-B2 · Jan 23, 2024 · US
Common mode voltage feed fault protection
US-2023402837-A1 · Dec 14, 2023 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-11831150-B2 · Nov 28, 2023 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-2023170684-A1 · Jun 1, 2023 · US
Differential protection method, differential protection device, and differential protection system
US-11588319-B2 · Feb 21, 2023 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-11575255-B2 · Feb 7, 2023 · US
Matrix converter with solid state circuit breaker
US-11575256-B2 · Feb 7, 2023 · US
Open-phase detection circuit and power conversion apparatus
US-2022334151-A1 · Oct 20, 2022 · US
Apparatus, power supply, method and recording medium to determine a state of a three-phase AC power supply using instantaneous voltages of three phases of the AC voltage
US-11424610-B2 · Aug 23, 2022 · US
Circuit interrupting device for providing ground fault and open neutral protection in temporary power applications
US-2022123545-A1 · Apr 21, 2022 · US
Earth leakage circuit breaker capable of outputting type of leakage current and method of controlling the same
US-11293994-B2 · Apr 5, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02H3/34?
- CPC H02H3/34 is the Cooperative Patent Classification code for “of a three-phase system.”
- How many patents are filed under CPC H02H3/34 (of a three-phase system)?
- Our database includes 51 publications tagged with this CPC code.
- Is patent activity under CPC H02H3/34 growing?
- Publication counts under this code: 4 in 2024 vs 6 in 2025 (latest complete years).