초록 ▼

A circuit interrupter protective device characterized by a two-level current limiting structure which provides current limiting on the main or supply side of the current limiter to one level of the peak let through current and to a much lower level on the load side which is achieved by activating a

A circuit interrupter protective device characterized by a two-level current limiting structure which provides current limiting on the main or supply side of the current limiter to one level of the peak let through current and to a much lower level on the load side which is achieved by activating a short circuit in parallel with the load by closing a set of shunt contacts the instant the current limiter begins to operate while the current limiter remains in the supply circuit to continue opening the circuit and dissipating the energy of an arc in deion plates.

대표청구항 ▼

A circuit interrupter protective device for responding to higher abnormal currents on the supply side than on the load side of an electrical distribution system, comprising a housing, a circuit interrupter structure in said housing and comprising first stationary contact means, first movable contact

A circuit interrupter protective device for responding to higher abnormal currents on the supply side than on the load side of an electrical distribution system, comprising a housing, a circuit interrupter structure in said housing and comprising first stationary contact means, first movable contact means cooperable with said stationary contact means, a contact carrier carrying said movable contact means, support means supporting said contact carrier for movement between closed and open positions, a magnetic drive structure comprising a magnetic device of magnetic material having an open slot therein open at one end thereof and closed at the other end thereof, said contact carrier being positioned in said slot in proximity to the open end of said slot, said support means including movable means for moving said contact carrier to the closed position, the circuit through said circuit interrupter passing through said contact carrier and said contacts in the closed position of said contact carrier, a second pair of contacts cooperating with the contact carrier and in a shorting circuit parallel with the load side of the system, and the second pair of contacts being movable between open and closed positions substantially simultaneously with the first and second pairs of contacts, and upon the occurrence of an overload current above a predetermined value through the contact carrier the magnetic flux generated by the current in the contact carrier operating in the magnetic device to drive the contact carrier into the slot toward the closed end of the slot to thereby open the first contacts and causing the second contacts to close.