Means to control the operating cycle of an electric motor operator for high ampere-rated circuit breakers

摘要

This invention relates to a high ampere-rated circuit breaker which meets the electrical code requirements of the world market. The charging of the powerful operating springs controlling the circuit breaker contacts is made automatically by means of an electric motor. The circuit breaker operating handle connects with the operating springs upon stalling of the electric motor. An electrical switching arrangement is used to remove power from the motor operator unit at the completion of the charging cycle.