Star-triangular voltage reduction trigger

• Main Authors: ZHENGQIAN HUANG, ZHOU ZENG, GUANGYAN WANG
• Format: Patent
• Language: English
• Published: 20.04.2005
• Edition: 7
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The utility model discloses a star-triangular voltage reduction trigger, which mainly comprises a lever, two coil curls and two static iron cores matching with the coil curl, a movable iron core, a transmission rod, a contact head bracket and a movable contact head and a fixed contact head. The movable iron core is arranged on the upper end of the transmission rod; a static iron core is arranged in each coil curl; the static iron core is arranged on one end of the lever; the contact head bracket, the movable contact head and the fixed contact head are arranged on the other end of the lever. The upper coil curl can be energized in use, the movable iron core attracted by the upper static iron core drives the transmission rod to move upwards; under the function of a lever, the contact head bracket moves downwards; thereby, the star-shaped starting is opened; the utility model starts, the lower coil curl can be energized by preset time delay; the movable iron core attracted by the lower static iron core drives the transmission rod to move downwards; under the function of the lever, the contact head bracket moves upwards; thereby, the triangular operation of the utility model is run; compared with the conventional voltage reduction trigger, the utility model adopts an integral structure. Because of the lever linkage mode, the utility model has the advantages of high security, small size and simple structure.