Apparatus for detecting state of disconnecting link

• Main Authors: YANG RENQING, WANG LIANG, ZHOU JINGZHONG, LU WENXING, SHEN DIQIU
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; RELAYS; SELECTORS; TESTING

The utility model provides an apparatus for detecting the state of a disconnecting link. The disconnecting link comprises a moving contact and a static contact. An end portion of the static contact is equipped with a leaf switch. The leaf switch is touched and pressed, by the moving contact, from a switching-in position to a switching-off position of the disconnecting link. The disconnecting link also comprises a DC power source and galvanometer. The leaf switch and the galvanometer are in series connection and then are connected to a circuit of the DC power source. When the disconnecting link is changed to a switching-in state, the moving contact rotates to touch and press the leaf switch to enable a closed loop to be formed among the DC power source, the leaf switch and the galvanometer, and a pointer of the galvanometer deflects. When the disconnecting link is in a switching-off state or is not fully switched in, the leaf switch is cut off, an open loop is formed among the DC power source, the leaf switch and the galvanometer, and the pointer of the galvanometer does not deflect. The apparatus is simple and reasonable in structure, low in price and high in practicality, effectively detects the actual state of the disconnecting link through the galvanometer, and helps to prevent maloperation and accidents due to incomplete shift of the disconnecting link.