To obtain a switch in which the arc voltage is increased with a small number of components, the current limit effect for limiting the interrupting current is enhanced, and the arc-extinguishing performance is enhanced while reducing the cost.
The switch includes a movable contactor 6 provided detachably for a contactor 4 disposed oppositely, an arc-extinguishing grid 7 provided in an arc-extinguishing chamber formed to include an arc generated when opening the movable contactor, an exhaust port 8 provided in the back surface of the arc-extinguishing grid and exhausting hot gas during interruption, and a permanent magnet 11 provided at a position where magnetic lines of force can interlink a current element in the arc, on the reverse side of the contact 3 of a contactor disposed oppositely to the movable contact 5 with respect to the movable contact 5 at the open end of the movable contactor, and directing the magnetic pole face of N pole or S pole toward an arbitrary direction between the arc-extinguishing grid and the exhaust port.
WATANABE SHINYA
NAKAGAWA ATSUSHI
MIYOSHI NOBUO
KOHI YUTA
Masuo Oiwa
Keigo Murakami
Kenji Yoshizawa