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Dairyland PCRX

Farwest is a stocking distributor for the full line of Dairyland (DEI) line of products and equipment.

The Dairyland PCRX is a solid-state decoupling device commonly used in conjunction with cathodically protected structures.

The PCRX prevents the flow of direct current while simultaneously providing a grounding current path for steady state induced alternating current, if present. Steady state AC current of up to 45A rms can flow through the device with DC voltage applied within the operating voltage range. These products also provide over-voltage protection for both lightning and AC fault current conditions.

The PCRX provides the additional benefit of electronically camouflaging itself from interrupted surveys, including close interval surveys (CIS), preventing the device from contributing to errors in potential readings. Field testing has shown that interrupted surveys can sometimes be impacted by combinations of factors such as pipeline coatings, soil resistivity, and the capacitance of decouplers resulting in excessively electro-negative instant-off values. In most cases the PCRX completely solves this problem. The PCRX camouflages itself to overcome capacitive effects ensuring accurate and timely potential measurements. It does this without sacrificing the rugged over-voltage, AC mitigation, CP isolation, and safety grounding of Dairyland’s standard decoupling products.

Overview

Building on Dairyland's industry-leading product lines, the PCRX represents the next technological leap forward in decoupling technology. Using sophisticated design techniques that represent the work of numerous leading experts around the world, the PCRX’s new camouflage technology renders it virtually invisible to interrupted survey testing.

Like our other decouplers, the PCRX is a solid-state, maintenance-free 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 PCRX provides safety grounding while also isolating your cathodically protected structure, improving CP system performance.

Technical Specifications

THRESHOLD VOLTAGE

-4.5/+3.5
-5.5/+2.5

AC STEADY-STATE CURRENT (amperes - rms) 50/60Hz

LIGHTNING SURGE CURRENT

100kA crest (8 x 20 µs waveform)

ENVIRONMENTAL RATING

NEMA 4X (standard)
Ambient Temperature Range: -40C to +50C (-40 to +122F)
IP66

HAZARDOUS (CLASSIFIED) AREAS

ANSI/ISA: Class I, Division 2, Groups A, B, C, D
ATEX: Zone 2, Group IIC
IECEx: Zone 2, Group IIC
UKEx: Zone 2, Group IIC

AC Fault Current (amperes-rms) 50/60 Hz
Model	30 cycles
PCRX-5KA	5,000
PCRX-10KA	10,000
PCRX-15KA	15,000

Model Number Description Chart

Description Chart

Certifications & Details

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 2, Groups A, B,C,D by UL & C-UL per:

UL 121201, 9th Ed. and CSA C22.2 No.213-17

Safety Requirements for Electrical Equipment per:

UL 61010-1, 3rd Ed. & CSA C22.2 No. 61010-1
Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
Enclosure Rating: NEMA 4X • Temperature Range: -40°C to +50°C (-40°F to +122°F)
Ambient Pressure of 80 kPa (0.8 bar) to 110 kPa (1.1 bar)
Max Altitude: 2000 meters
Relative Humidity: 0-100% noncondensing
Outdoor use
Pollution Degree 2
CSA C22.1 (Canadian Electric Code, Part I): 10-100 & 10-500

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

Zone 2, Group IIC, Increased Safety “ec”
EN IEC 60079-0: 2018
EN IEC 60079-7: 2015+A1:2018
IEC 60079-0: 2017
IEC 60079-7: 2017
Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
Temperature Range: -40°C to +50°C
Enclosure Rating: IP66

Accessories

A variety of accessories are available for the PCRX, much like other Dairyland decoupling products. For more information and pricing, contact a Farwest representative today.

Adapter Plate Kit	Pipe Mounting Kit	MTP-36	MTL Kit (Custom Conductor Kit)
ENCL General Purpose Enclosure	MTP-48	CAD-270	SWX-100-ENCL
SWX-100-INT48	SWX-100-INT48