High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Magnetic blowout
Reexamination Certificate
2006-11-28
2006-11-28
Enad, Elvin (Department: 2832)
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Magnetic blowout
C335S006000, C335S016000, C218S153000, C218S154000
Reexamination Certificate
active
07141751
ABSTRACT:
Disclosed is a breaker for providing successive trip mechanism based on PTC current-limiting device, which includes a first switch having first fixed/movable contact points; a second switch having second fixed/movable contact and connected to the first switch in parallel; PTC current-limiting device connected to the first and second switches in parallel or series and allowing a change of current flow direction from the first switch to the second switch at a fault current; a movable arm to which the movable contact points are installed at an interval therebetween and opening/closing the switches by operating the movable contact points; a fixed arm including first and second fixed arm conductors for guiding current flow toward the first fixed contact point in a normal load current mode and guiding current flow toward the second fixed contact point via the PTC current-limiting device in a fault current mode; and a successive trip means for elastically biasing the second switch by operation of the movable arm in a closing direction when both switches are closed and successively tripping both switches using time taken for releasing the elastic bias of the second switch when the movable arm is operated in a tripping direction.
REFERENCES:
patent: 4165502 (1979-08-01), Andersen
patent: 4849590 (1989-07-01), Becker et al.
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patent: 2006/0006145 (2006-01-01), Baiatu
Choi Won-Joon
Kang Jong-Sung
Kwon Yun-Hyuk
Lee Bang-Wook
Nam Seok-Hyun
Enad Elvin
Fishman M.
Jones Day
LS Cable Ltd.
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