Document Type and Number:
Japanese Patent JPS5417781
Kind Code:
Y2
Abstract:
A means for detecting low voltage in a circuit breaker control system comprising a static device and a voltage divider. Upon sensing low control voltage, the static device produces a signal which is applied to a silicon controlled rectifier which then provides a current path for energizing the associated circuit breaker tripping coil from a previously charged capacitor. In addition, a circuit is provided which disables the closing circuit or means of the circuit breaker when an undervoltage condition occurs or is present. Where desired, a capacitive network may be used in conjunction with the static undervoltage detector to delay its operation and to prevent slight fluctuations in voltage from causing the undervoltage detector to actuate a tripping operation of the associated circuit breaker.
Application Number:
JP4877572U
Publication Date:
July 07, 1979
Filing Date:
April 26, 1972
Export Citation:
International Classes:
H02H3/24; H02H11/00; (IPC1-7): H01H83/12