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    • 9. 发明公开
    • A switch with a thermoprotection
    • Wärmeschutzschalter
    • EP1521283A1
    • 2005-04-06
    • EP03425641.2
    • 2003-09-30
    • Signal Lux MDS S.r.l.
    • Coppola, Antonio
    • H01H37/74H01H37/52H01H37/60H01H37/00H01H5/06H01H37/34H01H73/26
    • H01H37/34H01H23/00H01H37/56H01H73/26
    • A safety switch, in particular for thermal protection of an electrical apparatus, comprises a container (1) inside which means (2) for activation of said switch is housed, said means comprising a command key (3) and a pair (4,5) of contact carriers, that are movable and fixed respectively, and a thermoprotector device (6) responsive to temperature variations in the environment to be controlled and adapted to act on the electric supply circuit of said apparatus depending on the perceived heat level.
      Said movable contact carrier (4) oscillates between two positions, an open position at which said contact carriers are separated from each other and respectively a closed position, at which said contact carriers are in mutual contact, each of said positions being imposed by a corresponding position of said command key.
      The thermoprotector device acts in case of need on the electric supply circuit and separates the contact carriers from each other by forcing the command key to the open position. This action deactivates the thermoprotector device and the switch therewith, and a new activation of the latter can only take place by exerting a pressure on the command key capable of bringing the key again to the closed position and set the thermoprotector again ready for operation.
    • 特别是用于电气设备的热保护的安全开关包括:容器(1),容纳用于启动所述开关的装置(2),所述装置包括一个指令键(3)和一对(4,5 ),分别可移动和固定的接触载体,以及响应于待控制的环境中的温度变化并适于根据感知的热水平作用在所述装置的电源电路上的热保护装置(6)。 所述可动接触载体(4)在两个位置之间振荡,所述接触载体彼此分开的打开位置和分别处于所述接触载体相互接触的闭合位置,每个所述位置为 由所述命令键的对应位置施加。 热电保护器件在需要电源电路的情况下起作用,并且通过将指令键强制到打开位置来将接触器彼此分开。 该动作使热保护装置及其开关无效,后者的新的激活只能通过对能够再次将钥匙重新置于关闭位置的指令键施加压力,再次将热保护器置于准备就绪的状态下进行操作。