Direct-current circuit breaker
US-10403449-B2 · Sep 3, 2019 · US
DC circuit breaker
US11069502B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11069502-B2 |
| Application number | US-201816969206-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 19, 2018 |
| Priority date | Apr 19, 2018 |
| Publication date | Jul 20, 2021 |
| Grant date | Jul 20, 2021 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A DC circuit breaker includes a fuse unit to interrupt a large current with a fuse, and the fuse unit includes a high-speed disconnector that is connected in parallel to the fuse and is opened when a fault current is detected.
First claim
Opening claim text (preview).
The invention claimed is: 1. A DC circuit breaker comprising a fuse breaker unit to interrupt a large current with a fuse, wherein the fuse breaker unit includes: a plurality of fuses connected in parallel to each other, a plurality of switches connected in series to the fuses, respectively, and a controller to control the plurality of switches, a high-speed disconnector that is connected in parallel to the plurality of fuses and their respective switches and is opened when a fault current is detected, and a self-excited-oscillation type DC circuit breaker unit that is connected in series to the fuse breaker unit and interrupts a small current with a self-excited oscillation method. 2. The DC circuit breaker according to claim 1 , wherein the fuse breaker unit includes a first metal oxide arrester that is connected in parallel to the fuses and the high-speed disconnector and suppresses an overvoltage after interruption of a direct current. 3. The DC circuit breaker according to claim 1 , wherein the self-excited-oscillation type DC circuit breaker unit includes a breaker unit that is opened when a load current is interrupted, and a capacitor and a reactor that are connected in parallel to the breaker unit. 4. The DC circuit breaker according to claim 3 , wherein the self-excited-oscillation type DC circuit breaker unit includes a second metal oxide arrester that is connected in parallel to the capacitor, the reactor, and the breaker unit and suppresses an overvoltage after interruption of a direct current. 5. A DC circuit breaker comprising a fuse breaker unit to interrupt a large current with a fuse, wherein the fuse breaker unit includes a high-speed disconnector that is connected in parallel to the fuse and is opened when a fault current is detected, and the fuse breaker unit includes a first metal oxide arrester that is connected in parallel to the fuse and the high-speed disconnector and suppresses an overvoltage after interruption of a direct current, and a self-excited-oscillation type DC circuit breaker unit that is connected in series to the fuse breaker unit and interrupts a small current with a self-excited oscillation method. 6. The DC circuit breaker according to claim 5 , wherein the self-excited-oscillation type DC circuit breaker unit includes a breaker unit that is opened when a load current is interrupted, and a capacitor and a reactor that are connected in parallel to the breaker unit. 7. The DC circuit breaker according to claim 6 , wherein the self-excited-oscillation type DC circuit breaker unit includes a second metal oxide arrester that is connected in parallel to the capacitor, the reactor, and the breaker unit and suppresses an overvoltage after interruption of a direct current.
Assignees
Inventors
Classifications
Structural association of a fuse or a fuse holder with a bimetallic element · CPC title
- H01H33/596Primary
for interrupting DC · CPC title
Structural association of a fuse and another component or apparatus (switches with built-in fuses H01H9/10, spark-gap arresters H01H85/44, transformers and inductances H01F27/402, capacitors H01G2/14, lamps H01K1/66, semiconductors H10W20/493 or H10W42/80) · CPC title
Circuit arrangements not adapted to a particular application of the protective device · CPC title
for DC applications · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11069502B2 cover?
- A DC circuit breaker includes a fuse unit to interrupt a large current with a fuse, and the fuse unit includes a high-speed disconnector that is connected in parallel to the fuse and is opened when a fault current is detected.
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification H01H33/596. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jul 20 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).