Explosion-Proof Decoupling


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Product Description

The PCRH 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 PCRH adds to the technology offering found in our PCR by featuring an explosion-proof package making it suitable for use in Class 1, Division 1 and Zone 1 areas. The PCRH’s third party certifications for Division 1 and Zone 1 areas make it the first decoupler in the world to carry such certifications.

UL – Canada & United States
Certification Image
AC Fault Current (Amperes-RMS) 50/60Hz
3.7kA at 30 cycles
5.0kA at 30 cycles
10kA at 30 cycles
15kA at 30 cycles

Review the Technical Literature for full fault current tables.

AC Steady-State Current
45A (standard)


Environmental Rating
Threshold Voltage
-3/+1V (standard)
-2/+2V (optional)
Lightning Surge Current
100kA crest (8 x 20 µs waveform)
Hazardous (Classified) Areas
ANSI/ISA: Class I, Division 1 & 2, Groups B, C, D
ATEX: Zone 1 Group IIB
IECEx: Zone 1 Group IIB
EAC: Zone 1, Group IIB
UKEx: Zone 1, Group IIB

The PCRH has been tested by Nationally Recognized Testing Laboratories (NRTLs) for compliance to independent standards in its operation, ratings, and construction.  This includes compliance to standards for:

Class I, Div. 1, Groups B, C, D and Zone 1, Group IIB

Class & Division System: UL (United States) and C-UL (Canada)

  • Effective Ground Fault Current Path per:
    • NFPA 70 (US National Electric Code – NEC): Article 250.4(A)(5)
    • CSA C22.1 (Canadian Electric Code, Part I): 10-100 & 10-500
  • Isolation of Objectionable DC Ground Currents per:
    • NFPA 70: Article 250.6(E)
    • CSA C22.1: 10-100 & 10-500
  • Hazardous Location Use: Class 1, Division 1 & 2, Groups B,C,D by UL & C-UL per:
    • UL 1203, 5th & CSA C22.2 No.30, 3rd Ed.
  • Safety Requirements for Electrical Equipment per:
    • UL 61010-1, 3rd & CSA C22.2 No. 61010-1, 3rd Ed.
    • Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
    • Enclosure Rating: NEMA 4X
    • Temperature Range: -45°C to +65°C  (-49°F to +149°F)

Zone System: ATEX / IECEx / UKEx (Europe / International / UK). ATEX per directive 2014/34/EU (Equipment for use in Potentially Explosive Atmospheres): 

  • Zone 1, Gas Group IIB, Frameproof “db”
  • EN IEC 60079-0: 2018
  • EN 60079-1: 2014
  • IEC 60079-0: 2017
  • IEC 60079-1: 2014-06
  • Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
  • Enclosure Rating: IP66
  • Temperature Range: -20°C to +60°C

EAC: Russia, Kazakhstan, etc. by KAZEXPOAUDIT

  • Zone 1, Gas Group IIB, Flameproof “d”
  • GOST 31610.0-2019 (EN IEC 60079-0:2018)
  • GOST IEC 60079-1-2013
  • Temperature Range: -20°C to +60°C

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