Product Catalog

Isolator Surge Protector

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The ISP is the original solid-state AC conducting/DC blocking device designed for the corrosion prevention industry. The ISP product line features the most flexible and wide range of product ratings and applications available to the market. Additionally, the ISP provides the highest levels of AC fault-handling capability - up to the highest typical transmission system faults. With its design features and ratings, the ISP is the preferred device for power utility underground cable decoupling/bonding requirements.

Features and Characteristics

  • Solid-state Design Replaces Polarization Cell Technology
  • No Maintenance Needed
  • Fail-safe Design
  • Self-protection Features Built-in
  • Simple Field Testing Procedures with Standard Equipment
  • Comprehensive Testing Available with the optional In-Situ Tester (IST)
  • Flashing LED Indicates Device Operation
  • No Energy/Power Requirements
  • Unlimited Number of Operations
  • Submersible Enclosure


  • Power cable sheath decoupling
  • Insulated joint protection
  • AC voltage mitigation on pipeline systems