Impressed-Current Cathodic Protection
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When large currents are needed or when high
electrolyte resistivity prevents the efficient use of galvanic anodes,
protective current needed to make the structure cathodic may be obtained
by applying low voltage dc current derived from normal AC mains supply.
This is achieved by transformer/ rectifiers which supply direct current
to specially designed anodes which dissipate large currents without
significant wastage.
This approach is used in impressed current
systems. The major components of a cathodic protection system are the
rectifier, positive and negative cables, and anodes. If the system
is in soil, carbon backfill is added.
Transformer Rectifiers
Brance-Krachy cathodic protection rectifiers
are recognized as the leader in quality and workmanship. Compact and
versatile Type ES and ES-II rectifiers provide reliable service in your
cathodic protection system. Rectifier designs have been improved by many
years of field proven service. Tightly controlled
manufacturing, conservative ratings and many extra features insure long and
trouble free operation.
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