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Model ISP Isolator/Surge Protector by Dairyland Electrical

ISP Overview The Dairyland 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 & 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 In-Situ Tester (IST) Flashing LED indicates device operation. No energy/power requirements. Unlimited number of operations. Submersible enclosure.    

Created by: Pipeline Corrosion Control

Last updated 11/2025

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Description

ISP Overview The Dairyland 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 & 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 In-Situ Tester (IST) Flashing LED indicates device operation. No energy/power requirements. Unlimited number of operations. Submersible enclosure.     Specifications AC FAULT CURRENT (AMPERES-RMS) 50/60HZ 35kA at 1 cycle 68kA at 1 cycle 118kA at 1 cycle Threshold Voltage 20V AC Steady-State Current (amperes – rms) 50 Hz 90A 120A Lightning Surge Current 75kA crest (8 x 20 µs waveform) 100kA (optional) Environmental rating: NEMA 4X or 6P Model Number Description Chart There is currently only 1 accessory for the Dairyland ISP. For more information and pricing, contact a Farwest representative today. (ISP Tester) Automated ISP Test Device
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