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PCRH
Polarization Cell Replacement
for Hazardous Locations
by Dairyland Electrical
Industries
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
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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.
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Specifications
 Threshold
Voltage
-3/+1V (standard)
-2/+2V (optional)
Other voltages optionalAC
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)
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AC Fault Current (amperes
– rms) 60H z |
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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 |
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AC Fault Current (amperes
– rms) 50 Hz |
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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
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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.
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