Current balancing apparatus and methods for parallel connected circuit breakers
AssigneeEaton Intelligent Power Limited
InventorsVinod Kumar Parmar, Amit Ashok Khendad, Daniel Edward Hrncir, Jr.
Life of this patent
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Abstract
Currents may be balanced in an apparatus including first and second conductors electrically connected to a third conductor and configured to be coupled to respective first and second parallel-connected circuit breaker switches using at least one magnetic core positioned adjacent at least one of the first and second conductors to introduce an inductance in the at least one of the first and second conductors. The at least one core may include at least one magnetic material ring that at least partially surrounds the at least one of the first and second conductors. The at least one magnetic material ring may include a plurality of laminated layers of grain-oriented steel.
Claims20
An apparatus comprising:
- first and second conductors electrically connected to a third conductor and configured to be coupled to first terminals of respective first and second circuit breaker switches such that the first and second circuit breaker switches are connected in parallel between the third conductor and a fourth conductor that connects second terminals of the first and second circuit breaker switches to one another;
- and
- at least one magnetic core positioned adjacent at least one of the first and second conductors.
An apparatus comprising:
- a circuit breaker comprising first and second switches having first contacts electrically connected to one another;
- first and second bus bars having first ends electrically connected to second contacts of the respective first and second switches of the circuit breaker;
- a third bus bar electrically connecting second ends of the first and second bus bars together such that the first and second switches are connected in parallel between the third bus bar and a node at which the first contacts of the first and second switches are connected to one another;
- and
- at least one ring of magnetic material at least partially surrounding at least one of the first and second bus bars between the third bus bar and the circuit breaker.
A method of balancing currents in an apparatus comprising first and second conductors electrically connected to a third conductor and configured to be coupled to respective first and second circuit breaker switches connected in parallel between the third conductor and a fourth conductor, the method comprising:
- positioning at least one magnetic core adjacent at least one of the first and second conductors to introduce an inductance in the at least one of the first and second conductors.
Dependencies are inferred from the claim text.