DIRECT CURRENT CIRCUIT BREAKER

DIRECT CURRENT CIRCUIT BREAKER

A DC circuit breaker includes: a mechanical switch (2) provided on an electrical path (1) through which a direct current flows; and a semiconductor switch (20) connected in parallel with the mechanical switch (2). The mechanical switch (2) includes a gas disconnector (3) and a vacuum circuit breaker...

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Hauptverfasser: SATO, Motohiro, KAMIMAE, Ryo, TOKOYODA, Sho, TAKAHASHI, Kazuki, HORINOUCHI, Katsuhiko
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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creator SATO, Motohiro
KAMIMAE, Ryo
TOKOYODA, Sho
TAKAHASHI, Kazuki
HORINOUCHI, Katsuhiko
description A DC circuit breaker includes: a mechanical switch (2) provided on an electrical path (1) through which a direct current flows; and a semiconductor switch (20) connected in parallel with the mechanical switch (2). The mechanical switch (2) includes a gas disconnector (3) and a vacuum circuit breaker (4) connected in series. Normally, the direct current flows through the mechanical switch (2). When interrupting the direct current, the vacuum circuit breaker (4) is made nonconductive to allow the direct current to be commutated to the semiconductor switch (20), and subsequently the gas disconnector (3) and the semiconductor switch (20) are made nonconductive. A vacuum circuit breaker (4) having a low withstand voltage can be used.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
title DIRECT CURRENT CIRCUIT BREAKER
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