Dairyland Polarization Devices

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Polarization Cell Replacement

Polarization Cell Replacement (PCR)

The Polarization Cell Replacement (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.  Commonly used to decouple electric equipment from grounding systems, for AC Mitigation projects, or other isolation and grounding applications, the PCR provides safety grounding while also isolating your cathodically protected structure, improving CP system performance. With a higher blocking voltage than polarization cells and other technologies, the PCR eliminates the need for placing devices in series. Additionally,high AC fault current and lightning surge current ratings provide long-life with a low risk of product failure making it an ideal solution. The PCR has been used by customers around the world and is the original solid-state decoupler offered to the industry.

Features and Characteristics

  • Solid-State, Maintenance Free Operation
  • Wide Range of AC Fault Ratings Suitable For Many Applications
  • 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
  • Certified by UL for IECEx Zone 2 locations
  • Available in Submersible Version
  • EAC Certified Products Available

Basic Ratings

Threshold Voltage
  • -3/+1V (standard)
  • -2/+2V (optional)
  • -4/+1V (optional)*
  • -6/+1V (optional)*
  • * Available with 3.7kA and 5kA fault current ratings. Not compatible with 80A models.
AC Steady-State Current (amperes – rms) 50/60Hz
  • 45A (standard)
  • 80A (optional)
Lightning Surge Current
  • 100kA crest (8 x 20 µs waveform)
Environmental Rating
  • NEMA 4X (standard)
  • NEMA 6P (optional)
Hazardous (Classified) Areas
  • ANSI/ISA 12.12.01, CSA C22.2 No.213-M1987 (R2008): Class I, Division 2, Groups A, B, C, D
  • ATEX: EN60079-0:2012, EN60079-15:2010 – Zone 2, Group IIC
  • IECEx: IEC60079-0: 6th Ed., IEC60079-15: 4th Ed. – Zone 2, Group IIC
  • EAC: GOST R IEC 60079-15-2010, GOST R IEC 60079-0-2011
Third-Party Listings and Approvals
  • Underwriter’s Laboratories (UL)
  • Underwriter’s Laboratories – Canada (C-UL)
  • UL/DEMKO
  • NANIO-CCVE

Polarization Cell Replacement for Hazardous Locations (PCRH)

Dairyland offers two versions of the Polarization Cell Replacement for addressing hazardous (classified) locations: the standard PCR for Class I, Div 2 and Zone 2 areas, and the PCRH for Class 1, Division 1 and Zone 1 areas. Featuring the same technology as the PCR in an explosion-proof package, the PCRH has been fully tested and listed by Underwriter’s Laboratory (UL) to the US and Canadian standards, as well as to European standards ATEX and IECEx. Third party certifications to these standards make Dairyland decouplers the first in the world to carry such certifications.

Features and Characteristics

  • Utilizes the same proven and reliable design of the PCR
  • UL, C-UL listed explosion-proof design: unique to the industry
  • Listed for use in Division 1 & 2 areas, Groups B, C, D
  • IECEx certified for Zone 1 – UL
  • ATEX certified for Zone 1 – UL/DEMKO
  • Listed as an “effective grounding path” per the NEC and CSA grounding standards
  • EAC Certified Products Available

Basic Ratings

Threshold Voltage
  • -3/+1V (standard)
  • -2/+2V (optional)
AC Steady-State Current (AMPERES – RMS) 50/60HZ
  • 45A (standard)
Lightning Surge Current
  • 100kA crest (8 x 20 µs waveform)
Environmental Rating
  • NEMA 4X, IP66
Hazardous (Classified) Areas
  • Class I, Division 1 & 2, Groups B, C, D according to:
  • NFPA 70 (U.S. National Electric Code) sections 500-505
  • UL 1203
  • CSA C22.2 No. 30-M1986 (R2012)
  • EAC: GOST R IEC 60079-1-2008, GOST R IEC 60079-0-2011
  • ATEX and IECEx
  • For Zone 1 use for Gas Group IIB under protection method “d” according to: EN60079-0:2009; EN60079-1:2007; IEC60079-0, 5th Edition; IEC60079-1, 6th Edition
Third-Party Listings and Approvals
  • Underwriter’s Laboratories (UL)
  • Underwriter’s Laboratories – Canada (C-UL)
  • UL/DEMKO
  • NANIO-CCVE
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