124280911212186127974.2.3CathodicIsolators

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CATHODIC ISOLATORS

PIPELINE EARTHING & ISOLATION ACCESSORIES DATASHEET 4.2.3

REVISION 1

Venture Way, Grantham, Lincs NG31 7XS UK. Tel: +44 (0)1476 590666 Fax: +44 (0)1476 570605

Email: [email protected] Website: www.cathodic.co.uk

Registered Office: Minalloy House, Regent Street, Sheffield S1 3NJ, UK VAT No. 116 8408 71, Regd in England No. 478098

DATASHEET4.2.3

APPLICATION

Onshore Pipelines & Storage Tanks

CATHODIC ISOLATOR DATA

Electrical Isolation for Effective Cathodic Protection

Cathodic protection, proven by decades of service in avariety of applications, prevents corrosion of buried orsubmerged metallic structures.

Cathodic protection is most efficiently and uniformly appliedwhen the primary structure is electrically isolated i.e. allmetallic/electrical contacts with foreign structures areeliminated. Electrical isolation gives three main benefits:

Restriction of the required protective current to thesurface of the primary structure to produce a uniformpolarised level of protection.

Minimization of stray DC current interference.

Prevention of galvanic current between metallic structures.

Safe Cathodic Isolation

The uniquely designed Cathodic Isolator developed byRustrol Systems effectively confines the current needed forcathodic protection, while providing a safe grounding pathduring all types of electrical disturbances.

Cathodic isolation is a superior form of electrical isolation.Cathodic isolation maintains stringent electrical groundingrequirements and confines the protective current at thesurface of the primary structure. The result is highlyeffective, uniform protection against corrosion.

The Rustrol Cathodic Isolator meets safety standards foreffective grounding and conforms to the need for safeoperating practices worldwide, ie; not to exceed 15Voltsrms (caution) potential most often stipulated by design.

The Cathodic Isolator provides all of the advantages ofelectrical isolation necessary for cathodic protection byblocking the protective current at the electrical isolatingdevice such as across a pipeline isolating flange. As soonas the potential across the isolating flange exceeds thepre-set voltage threshold, the Rustrol Cathodic Isolator

responds instantly.


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DATASHEET4.2.3

The Cathodic Isolator protects personnel and equipmentduring all types of electrical disturbances by providing aneffective grounding path which instantly conducts:

AC Fault Currents Lightning AC Induction Power Switching Surge Currents

The Cathodic Isolator is indispensable for safe electricalisolation to assure unprecedented protection of yourpersonnel and equipment.

Versatile Protection

Unique developments in electronic circuitry are incorporatedin the Rustrol solid state Cathodic Isolatorto assure acutesensitivity, instant response and fail-safe, maintenance freeoperation in a non-electrolytic environment.

The Cathodic Isolator and associated hardware featurethe most advanced and reliable components now available.Each critical component is precisely machined and carefullyassembled to meet Rustrols exceptionally stringent qualityassurance standards.

Research and development models have undergonethorough acceptance testing by independent high-currenttest facilities and have been fully approved (test dataavailable on request).

Rustrols Proven Quality Assures Reliable Operation

Along with performing a key role in safe and effective

corrosion control, the Rustrol Cathodic Isolator also servesto reduce both capital and maintenance costs of cathodicprotection systems. Cost effective applications include:

AC fault current protection across isolating flanges andother devices.

Mitigation of induced AC on pipelines and other structures.

Lightning protection for equipment, including CP rectifiers.

De-coupling of the primary structure eg; Fuelling facilityfrom contact with the electrical utilities grounding network.

Applications for Cost Effective Operation


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DATASHEET4.2.3

124280911212186127974.2.3CathodicIsolators

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