Polarization Cell Replacement for Hazardous (PCRH) Locations by Dairyland Electrical

A solid state device which provides DC isolation & AC grounding up to a threshold of 3V. For Class I, Div 1 & 2 Harzardous Locations.

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    PCRH Overview

    En español

    DEI offers two versions of the PCR for addressing hazardous (classified) locations: the standard PCR for Class I, Div 2 and Zone 2 areas, and the PCRH 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.

    Features & Characteristics

    • UL, C-UL listed explosion-proof design: unique to the industry.
    • Uses the same solid-state internal construction as our industry standard PCR.
    • Listed for use in Division 1 & 2 areas, Groups C, D.
    • Listed as an “effective grounding path” per the NEC and CSA grounding standards.
    • Offered with optional customized lead kits.

  • Specifications

     

    Threshold Voltage
    -3/+1V (standard)
    -2/+2V (optional)
    Other voltages optional

     

    AC Steady-State Current (amperes – rms) 60Hz
    45A (standard)

    AC Steady-State Current (amperes – rms) 50Hz
    40A (standard)

    Lightning Surge Current
    100kA crest (8 x 20 µs waveform)

     

    AC Fault Current (amperes – rms) 60H z
     Model 1 cycle 3 cycles 10 cycles 30 cycles
     PCRH-3.7KA
     PCRH-10KA
     PCRH-15KA    		 6,500
    20,000
    35,000    		 5,000
    15,000
    27,000    		 4,200
    12,000
    21,000    		 3,700
    10,000
    15,000
     
    AC Fault Current (amperes – rms) 50 Hz
     Model 1 cycle 3 cycles 10 cycles 30 cycles
     PCRH-3.5KA
     PCRH-9KA
     PCRH-14KA    		 6,100
    19,000
    33,000    		 4,700
    14,000
    25,000    		 3,900
    11,000
    19,000    		 3,500
    9,000
    14,000

     

    Environmental rating:
    NEMA 4

    Hazardous (classified) areas:
    Per NEC, CSA: Class I, Division 1 & 2, Groups C, D

    Third-party listings and approvals:
    Underwriter’s Laboratories (UL)
    Underwriter’s Laboratories - Canada (C-UL)

    Dimensions & installation
    See PCRH drawings in pdf format

  • Comparison of Dairyland PCRH to other solid-state devices

    Following on the success of the model PCR, the Dairyland model PCRH offeres fully certified products for Class I, Division 1 hazardous locations. There are no equivalents to the model PCRH; however it is common for others to place a protection product inside of a commercially available explosion-proof box and erroneously consider the entire package to be considered "explosion-proof." Altering a certified enclosure nullifies the listing or certification unless the entire package is again tested and recertified. Dairyland has taken the route of full testing and certification for the model PCRH, as it is used in explosive atmospheres. The device was successfully tested and certified.

    The PCRH has extensive certification. In fact, no other products of this type on the market have any known certification to any standards whatsoever. Consider the following PCRH certifications:

    • UL listed as an "effective grounding path" per the US National Electrical Code (NEC).
    • UL listed for blocking cathodic protection current per the US NEC.
    • UL listed as meeting the lightning surge current standards.
    • UL listed for Class I, Division 1 & 2 hazardous locations.
    • UL listed NEMA 4 environmental rating.
    • C-UL listed as an "effective grounding path" per the Canadian Electrical Code.
    • C-UL listed for Class I, Division 1 & 2 hazardous locations.

    Other features include:

    • Unique, patented construction that assures maintenance-free operation.
    • Assured fail-safe design, independently tested.
    • Proprietary manufacturing methods that assure corrosion resistance, high AC fault capability, and low leakage current.