(PCR) Polarisation Cell Replacement

Polarization Cell Replacement (PCR) solid state decoupler devices which conduct once a predetermined voltage has been attained. Once conducting, they maintain the predetermined volt drop across the device. The voltage clamping devices will “soft turn on” as the threshold approaches and have a partial turn on, bleeding more and more current off of the pipeline as the voltage threshold is approached. Once at predetermined threshold, the voltage will be clamped while the conduction will be at maximum.

The Voltage clamping devices comply with NFPA 70 guidelines as they do not ”Short Circuit” the current or the voltage off the pipeline.

These types of devices can have AC mitigation circuits in parallel to decouple AC steady state interference from overhead powerlines on the pipe to cater for AC voltage below the cathodic protection DC fault threshold level. Once “on”, current flowing through the device will not keep the device conducting if the voltage falls below the predetermined threshold.

Clamping devices are heat generation (ignition temperatures in Hazardous zones) and relative physical size whilst they comply with NFP 70 guidelines.

Wide DC clamping voltage range +2V/-2V, +1V/-3V, +1V/-12V. Other range options available on request.

Features:
  • Largest and most robust unit In the Decoupler Range
  • Wide range of options to suit specifications and design requirements
  • Solid State Technology
  • Slow Turn on
  • Volt Drop across the Device – ( Does not Short Circuit) “effective ground fault path” as defined by National Fire Protection Act, article 250.2(USA). Once “on”, current flowing through the device will not keep the device conducting if the voltage falls below the predetermined threshold.
  • Suitable for all applications
  • Meets NFPA 70 requirements & guidelines
  • Easy installation and optional accessories
Compliance:
  • “Effective ground fault path” as defined by National Fire Protection Act (NFPA), article 250.2(USA)
  • “Clamping Devices” guideline in National Fire Protection Act (NFPA) 70

Drawings:
Drawings

Specifications:

  • AC fault current rating 1.2 kA and 3.7 kA for 30 cycles.
  • Wide DC clamping voltage range +2V/-2V, +1V/-3V, +1V/-12V. Other range options available on request.
  • High steady state DC current drain
  • 60 Hz AC impedance of 0.04 Ω
  • AC steady state current 45 A @ 50/60 Hz
  • Lightning DC spark over voltage -600 V
  • IP68 Submersible design up to two meters in depth
  • Exe (Hazardous Areas 1 and 2)

Description

Option Amp DC Voltage Unit Purchase
PCR 3.7kA, +1,-3V (715371) 3.7kA 45 +1,-3V   Call to order
PCR 3.7kA, +2,-2V (715372) 3.7kA 45 +2,-2V   Call to order