Polarization Cell Replacement (SSD-DCD) Decoupler

Polarization Cell Replacement (SSD-DCD): Innovative technology that controls and preserves Cathodic Protection currents, limits and mitigates overvoltages or stray currents.

“Non-Shorting” retains the applied voltage at the threshold level whilst in limiting mode action in compliance with NFPA 70 Section 250 for controlling and preserving Cathodic Protection currents on pipeline/ structure whilst limiting and mitigating & DC overvoltages. The additional patented feature removes capacitive corruption of DCVG & CIPS survey signals whilst preserving surveyor safety.

Features:
  • Largest and most robust unit in the Decoupler Range.
  • Wide range of options to suit specifications and design requirements.
  • Volt Drop across the Device – ( does not short circuit)
  • Suitable for all applications
  • Easy installation and optional accessories

We are also happy to engage with you on your specific needs should they not be listed here. We have been manufacturing CP Equipment since 1992.

Other voltage threshold ranges available on request.

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Category: SKU: SSD - Polarization Cell Replacement

Description

Overview

Polarization Cell Replacement (SSD-DCD) 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 the 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”, the 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/-6V ; +1V/-12V. Other range options available on request.

Additional Features:
  • 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.
  • Meets NFPA 70 requirements & guidelines.
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

Specifications

Specifications:

  • AC fault current rating 1.2 kA; 2kA; 3.7 kA; 5kA; 9kA & 14kA 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)

To order, please request a quote using the add to quote button above or get in touch with us directly using our contact form or giving us a call. 

Option AC Fault Amp DC Threshold Voltage
SSDth 1.2kA, +2,-2V
 1.2kA 45 +2,-2V
SSDth 1.2kA, +1,-3V
 1.2kA 45 +1,-3V
SSDth 1.2kA, +1,-6V
 1.2kA 45 +1,-6V
SSDth 1.2kA, +1,-12V
 1.2kA 45 +1,-12V
SSDth 2kA, +2,-2V
 2kA 45 +2,-2V
SSDth 2kA, +1,-3V
 2kA 45 +1,-3V
SSDth 2kA, +1,-6V
 2kA 45 +1,-6V
SSDth 2kA, +1,-12V
 2kA 45 +1,-12V
SSDth 3.7kA, +2,-2V
 3.7kA 45 +2,-2V
SSDth 3.7kA, +1,-3V
 3.7kA 45 +1,-3V
SSDth 3.7kA, +1,-6V
 3.7kA 45 +1,-6V
SSDth 3.7kA, +1,-12V
 3.7kA 45 +1,-12V
SSDth 5kA, +2,-2V
 5kA 45 +2,-2V
SSDth 5kA, +1,-3V
 5kA 45 +1,-3V
SSDth 5kA, +1,-6V
 5kA 45 +1,-6V
SSDth 5kA, +1,-12V
 5kA 45 +1,-12V

 

Larger 9ka & 14kA options also available by request

Additional information

AC Fault Options

1.2kA @ 500 mSec. (30 Cycles), 2kA @ 500 mSec. (30 Cycles), 3.7kA @ 500 mSec. (30 Cycles), 5kA @ 500 mSec. (30 Cycles), 9kA @ 500 mSec. (30 Cycles), 14kA @ 500 mSec. (30 Cycles)
DC Threshold Options (SSD-DCD)

+1V/-3V, +2V/-2V, +1V/-6V, +1V/-12V
Isolation Switch Required

No, Yes
Enclosure Options

Standard IP 68 Exe, Other

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