To provide a switch in which a three-phase circuit break portions are housed in a row in a case and an insulating barrier is arranged at each of positions between the circuit break portions of three phases and each of the outsides of the circuit break portions at both end sides, in which rise of pressure in the case due to the barrier preventing pressure release upon releasing pressure in the case is prevented, and safety is improved.
The three-phase circuit break portions are housed in the case 10 having a case body 11 and a cover 12 to close the aperture of the case body, and an insulating barrier 40 is arranged at each of positions between the circuit break portions of three-phases and each of the outsides of the circuit break portions at both end sides. Each of the barriers 40 is supported to the case 10 at the upper part at both ends in width direction and at the lower part of one end in width direction through a support member 41. Since the lower part of the each barrier is supported to the case body at only one end in width direction, when the pressure in the case rises, the each barrier is deformed easily and prevents occurrence of local pressure rise in the case to make a pressure release operation smooth.
| JPS58146340 | 【考案の名称】柱上用開閉器の放圧表示装置 |
SHIGA DAISUKE
BABA AKIRA
| JPH012333U | ||||
| JPS63113405U | 1988-07-21 | |||
| JPH10334775A | 1998-12-18 | |||
| JPH037007Y2 | 1991-02-21 |