1.  Polarization Cell Replacement (PCR)

The PCR is a solid-state device designed to simultaneously provide DC decoupling and AC continuity / grounding when used with cathodically protected structures, such as pipelines, tanks, grounding systems, and cable casings. The PCR has very high AC fault current and lightning surge current ratings. UL listed as an "effective grounding path." Can be installed in electrical grounding systems for DC isolation.

• Range of AC Fault Ratings.

• Higher Blocking Voltage than Polarization Cells.

• UL and C-UL Listed for Grounding Electrical Equipment.

• UL, C-UL Listed for Class I, Division 2 Locations.

• Certified by UL / Demko for Meeting ATEX Directive for Zone 2; CE Marked.

• Available in Submersible Version.

The PCRH is a DC decoupling and AC continuity/grounding device with the same electrical ratings as the PCR, but it is rated for Class I, Div 1 & 2 areas. Having been fully tested and listed by Underwriter’s Laboratory (UL) to the US and Canadian standards, the device carries the UL mark and C-UL (Canada) mark. No other known company offers decouplers with third-party listings for hazardous locations.

• Same electrical ratings as the standard PCR.
• UL listed for Class 1, Division 1 & 2 locations.
• UL listed to meet U.S. National Electric Code section 250 for effective grounding path.
• Provides simultaneous AC grounding and DC isolation.
• Rated for lightning surges, AC faults, and steady-state AC current.
• The only UL-listed product of its type.

The OVP is an over-voltage protector for Class I, Div. 1 & 2, Group B, C, D locations. Instead of a gapped design, the OVP uses solid-state switching components to conduct at very low voltages, providing the best over-voltage protection. Rated for AC fault current as well as high values of lightning surge current, the OVP can be applied to sites where a spark-gap arrester or metal oxide varistor (MOV) would be inappropriate.

• The only fail-safe "arrester" on the market (i.e., fails shorted).
• Solid-state design eliminates arcing.
• Conduction at much lower voltages than gapped arresters.
• Rated for AC fault current and lightning surge current.
• Suitable for submersed or above-ground locations.
• UL, C-UL listed explosion-proof design.
• Corrosion resistant nickel finish.

The ISP is an isolation / surge protection with the greatest range of design ratings. Suitable for higher blocking voltage requirements and/or high AC fault conditions, the ISP is commonly used on power utility underground transmission cable casings, sites with higher DC voltage present, or sites with comprehensive testing requirements. The ISP can be analyzed using the In-situ Tester to verify all modes of operation and read site parameters.

• Solid-state design replaces polarization cell technology.
• No maintenance needed.
• Fail-safe design with 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.

Lightning surge current rating:	50,000A or 75,000A crest
AC fault current ratings, range:	3,700A (rms) to 30,000A (rms) at 0.5 sec
Steady-state AC current ratings:	30A (rms) to 90A (rms)
Blocking voltage:	10V or 17V

Dairyland Electrical Industries (DEI) has served the energy, corrosion, and electrical service industries since 1983 with innovative solid-state products for isolation, grounding, and protection. Offering the first solid-state solutions to each of these markets, DEI remains the leader in the industry, with constant product development. DEI’s conservative designs lead to proven long life and maintenance-free operation.

DEI established the technology requirements for protective products in the industry and provides these important features:

• Fail-safe design
• Maintenance-free
• Independent laboratory testing and listing
• Products listed for hazardous locations
• Ratings that eclipse other technologies

Where electrical or other safety codes apply, DEI offers products that are independently tested and certified. Examples of such compliance include listings by Underwriter’s Laboratories (UL) in the U.S. and Canada for electrical grounding safety codes, and stringent testing for hazardous location use as well. For Europe, we offer CE marked products that have been given Type Certificates by DEMKO. For the marine markets, products have been tested by Imanna Laboratories, and further approved by the American Bureau of Shipping (ABS). DEI is committed to producing superior products, tested to industry standards for full traceability.

• Limit over-voltages to the lowest possible levels.
• Minimize cathodic protection current requirements.
• Bring cathodic protection voltages into compliance.
• Comply with electrical codes for grounding.
• Safely conduct AC fault current and lightning current to ground.

Applications
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• Mitigation of induced AC voltage on pipelines.
• Over-voltage protection of insulated joints from lightning and AC fault current.
• DC isolation and AC grounding of cathodically protected structures from ground.
• DC isolation and AC grounding of utility power cable sheath/neutral.
• Marine isolation: ship-to-shore.
• Galvanic isolation of structures: piers, wells, water pipelines.

Industries
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• Electric Transmission
• Electric Distribution
• Gas/Oil/Products Pipelines
• Water Pipelines
• Tank Farms/Terminals
• Refineries/Plants
• Airports
• Rail Systems
• Service Stations