| 摘要 |
FIELD: home electric appliances. SUBSTANCE: when button 1 is pressed contacts 13 are closed and load 2 is turned on. This results in locking of clamp 12 by core 9. When voltage level is nominal three-electrode gate is non-conducting. When voltage level reaches threshold, threshold gate 11 fires and three-electrode gate 10 is rendered conducting, actuating unit 8 fires and clamp 12 is unlocked. This results in breaking of contacts 13 and both load 2 and protecting unit are switched off. EFFECT: increased efficiency, increased reliability, increased field of application. |
