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US 2004/0057174 A1Published application
Cathodic protection junction box current equalizer
AssigneeSaudi Arabian Oil Company
InventorHusain M. Al-Mahrous
Life of this patent
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Abstract
A cathodic protection junction box current equalizer has a plurality of output terminals each being connectable through a variable resistors to an anode, the resistors being controlled such that the corresponding anode outputs a desired current.
Claims6
A cathodic protection junction box current equalizer for providing cathodic protection current to a plurality of anodic areas on at least one metal structure, said equalizer being electrically positioned between a rectifier and an anode bed having a plurality of buried anodes and comprising:
- a main terminal connectable to receive a positive voltage from the rectifier;
- a plurality of output terminals;
- a plurality of resistors each having a variable resistance value,
- each of said output terminals being connectable through a corresponding one of said resistors to a corresponding one of the anodes, and said resistance value of each of said resistors being controlled such that the corresponding anode outputs a desired current;
- and
- a heat dissipative structure for dissipating heat losses of said resistors.
3 more elements
Dependencies are inferred from the claim text.