Safety design for dc link capacitors
US-2019386576-A1 · Dec 19, 2019 · US
involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus {(for transformers H02H7/045)}
involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus {(for transformers H02H7/045)} · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02H3/28 |
| Official title | involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus {(for transformers H02H7/045)} |
| Display label | involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus {(for transformers H02H7/045)} |
| Total patents | 155 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 14 |
| 2017 | 12 |
| 2018 | 14 |
| 2019 | 6 |
| 2020 | 16 |
| 2021 | 18 |
| 2022 | 11 |
| 2023 | 18 |
| 2024 | 16 |
| 2025 | 12 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for identifying the fault by current differential protection and device thereof
US-10393810-B2 · Aug 27, 2019 · US
Oring control using low voltage device for high voltage DC rack
US-10381822-B2 · Aug 13, 2019 · US
Power distribution system and method
US-2019173279-A1 · Jun 6, 2019 · US
Method of operation a differential protection scheme
US-2019140440-A1 · May 9, 2019 · US
Distributed arc fault protection between outlet and circuit breaker
US-10181714-B2 · Jan 15, 2019 · US
Apparatuses and methods for passive fault monitoring of current sensing devices in protective circuit interrupters
US-2018321318-A1 · Nov 8, 2018 · US
Improvements in or relating to direct current protection schemes
US-2018301894-A1 · Oct 18, 2018 · US
Improvements in or relating to direct current distance protection schemes
US-2018294644-A1 · Oct 11, 2018 · US
Electronic protection device
US-2018287368-A1 · Oct 4, 2018 · US
Protective relay device
US-2018278041-A1 · Sep 27, 2018 · US
Travelling wave protection of a transmission line
US-10074969-B2 · Sep 11, 2018 · US
Power distribution systems and methods of performing ground fault detection in power distribution systems with a communication network
US-2018241192-A1 · Aug 23, 2018 · US
Method of detecting electrical disturbance by dc component
US-2018191151-A1 · Jul 5, 2018 · US
Oring control using low voltage device for high voltage dc rack
US-2018166873-A1 · Jun 14, 2018 · US
Travelling Wave Protection Of A Transmission Line
US-2018069391-A1 · Mar 8, 2018 · US
Method for detecting fault and current differential protection system thereof
US-9899830-B2 · Feb 20, 2018 · US
Protection circuit for electronic system
US-9893512-B2 · Feb 13, 2018 · US
Power transformer inrush current detector
US-9891289-B2 · Feb 13, 2018 · US
Protective relay system and protective relay device
US-9871365-B2 · Jan 16, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02H3/28?
- CPC H02H3/28 is the Cooperative Patent Classification code for “involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus {(for transformers H02H7/045)}.”
- How many patents are filed under CPC H02H3/28 (involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus {(for transformers H02H7/045)})?
- Our database includes 155 publications tagged with this CPC code.
- Is patent activity under CPC H02H3/28 growing?
- Publication counts under this code: 16 in 2024 vs 12 in 2025 (latest complete years).