High power current limiter with a current commutating...

Details High power current limiter with a current commutating... High power current limiter with a current commutating...

H - Electricity

01

C

328/18, 338/18

H01C 7/13 (2006.01) H01C 1/14 (2006.01) H01H 33/00 (2006.01)

Patent

CA 1157117

13 48,637 ABSTRACT OF THE DISCLOSURE A high power current commutation device for use with electrolytic cells to permit the system current to be shunted from the cell, and to thereafter be commutated back through the cell. The commutation device employs a plurality of parallel path vacuum switches, with at least one vacuum switch being serially connected to a resistor which increases in resistance with temperature. This resistor has a specific heat characteristic and thermal time constant such that current through the resistor will result in a potential drop across the resistor exceeding the electrolytic cell back potential to thereby commutate current back through the cell. A specific resistor design for use in the current commutation device is detailed.

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