摘要：【中文】本发明公开了一种蝶形双金属片，包括片状双金属圆环，设置在片状双金属圆环上的支撑部、连接在支撑部上的弹性片头；所述片状圆环内设置有突跳槽，突跳槽沿弹性片头中心对称并呈蝶形。同时公开了采用该双金属片的越限指示装置和线夹,越限指示装置包括安装底座、与安装底座连接的基体，并在安装底座上设置有外部连接机构。线夹在夹子上安装有越限指示装置。本发明采用机械式越限指示装置，当达到限定温度，指示装置机构动作，做出温度越限警示，使维护人员能够及时发现出现温度超标的线夹，及时进行更换修复，有效避免线夹温度过热而造成事故，可以适用于电力系统的输电、变电、配电线路线夹。 【EN】The invention discloses a butterfly-shaped bimetallic strip, which comprises a sheet-shaped bimetallic ring, a supporting part arranged on the sheet-shaped bimetallic ring and an elastic strip head connected to the supporting part; the sheet-shaped circular ring is internally provided with a leapfrog groove which is symmetrical along the center of the elastic sheet head and is in a butterfly shape. The out-of-limit indicating device comprises an installation base and a base body connected with the installation base, and an external connecting mechanism is arranged on the installation base. The wire clamp is provided with an out-of-limit indicating device on the clamp. The mechanical out-of-limit indicating device is adopted, when the limited temperature is reached, the indicating device mechanism acts to warn that the temperature is out of limit, so that maintenance personnel can find the wire clamp with the temperature exceeding the standard in time and replace and repair the wire clamp in time, accidents caused by overheating of the wire clamp temperature are effectively avoided, and the mechanical out-of-limit indicating device is suitable for wire clamps of power transmission, power transformation and distribution lines of a power system.