Solid State Decoupler

Tested & Certified
All M.C.Miller Decouplers are manufactured to the highest quality standards. Each unit is tested and certified to ensure specification compliance and a serialized certificate is provided with each order.

The Solid State Decoupler (SSD) functions as a DC voltage level clamping device in buried pipeline and storage tank systems.

Features
  • Smaller and more economical than PCR technology
  • Wide range of options to suit specifications and design requirements
  • Sharp Turn on Feature
  • Solid State Technology
  • Short Circuit to Ground - “effective ground fault path”
  • Limited application
  • Easy installation and optional accessories

It can, at the same time, mitigate AC voltage. This feature allows up to 45A AC induced current to pass and prevents the flow of DC current while the DC voltage remains below the predetermined design blocking threshold. When the DC voltage exceeds the threshold, the device instantly switches on forming a near short circuit across the circuit and limits the DC voltage of the device under Cathodic Protection. Immediately, the voltage falls as the surge event passes and decays to below the threshold level, the SSD switches off and reverts to its blocking mode (“Off State”).

These types of devices do not fully comply with NFP 70 guidelines when they are in conduction mode. Both cathodic protection applied DC and Induced AC present on the operating circuit (Insulated / coated Structure) is short circuited (to Ground). Once “on”, current flowing through the device can maintain these devices in the conducting state even when the voltage fault threshold has fallen below the level set. Their application can result in surging of cathodic protection power supplies.

Typical current discharge limits are 1.2kA, 2kA, 3.7kA, and 5kA for 30 cycles. Greater discharge limits are available but are by special request.

Solid State Decoupler (SSD) devices are typically factory set to standard thresholds ranging from +2V to –2V through –20V.


*Please use the Filter option below to narrow specifications, or browse the table list of standard SSD decoupler units we offer.

Brochures:

Manuals:

Additional Information:

General Specification:

Drawings:

Specifications:

  • Available with AC fault current rating 1.2 kA or 3.7 kA for 30 cycles
  • Wide DC clamping voltage range +2V, -2V, -5.6 V, -9.2 V , -12.8 V, -16.4 V, -20 V
  • High steady state DC current drain
  • 60 Hz AC impedance of 0.04 Ω (Extra)
  • AC steady state current 45 A @ 50/60 Hz (Extra)
  • Lightning impulse current rating Class 1: 100 kA for 10/350 µs
  • Lightning DC spark over voltage -600 V
  • IP68 Submersible design up to two meters in depth
  • Exe (Hazardous Areas 1 and 2)
Filter
Option AC Fault Amp DC Voltage Unit Purchase
SSDth 1.2kA, +2,-2V
SSDth 1.2kA, +2,-2V
710120
1.2kA 45 +2,-2V
Call to order
SSDth 1.2kA, +2,-5.6V
SSDth 1.2kA, +2,-5.6V
710121
1.2kA 45 +2,-5.6V
Call to order
SSDth 1.2kA, +2,-9.2V
SSDth 1.2kA, +2,-9.2V
710122
1.2kA 45 +2,-9.2V
Call to order
SSDth 1.2kA, +2,-12.8V
SSDth 1.2kA, +2,-12.8V
710123
1.2kA 45 +2,-12.8V
Call to order
SSDth 1.2kA, +2,-16.4V
SSDth 1.2kA, +2,-16.4V
710124
1.2kA 45 +2,-16.4V
Call to order
SSDth 1.2kA, +2,-20V
SSDth 1.2kA, +2,-20V
710125
1.2kA 45 +2,-20V
Call to order
SSDth 2kA, +2,-2V
SSDth 2kA, +2,-2V
710200
2kA 45 +2,-2V
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SSDth 2kA, +2,-5.6V
SSDth 2kA, +2,-5.6V
710201
2kA 45 +2,-5.6V
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SSDth 2kA, +2,-9.2V
SSDth 2kA, +2,-9.2V
710202
2kA 45 +2,-9.2V
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SSDth 2kA, +2,-12.8V
SSDth 2kA, +2,-12.8V
710203
2kA 45 +2,-12.8V
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SSDth 2kA, +2,-16.4V
SSDth 2kA, +2,-16.4V
710204
2kA 45 +2,-16.4V
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SSDth 2kA, +2,-20V
SSDth 2kA, +2,-20V
710205
2kA 45 +2,-20V
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SSDth 3.7kA, +2,-2V
SSDth 3.7kA, +2,-2V
710370
3.7kA 45 +2,-2V
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SSDth 3.7kA, +2,-5.6V
SSDth 3.7kA, +2,-5.6V
710371
3.7kA 45 +2,-5.6V
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SSDth 3.7kA, +2,-9.2V
SSDth 3.7kA, +2,-9.2V
710372
3.7kA 45 +2,-9.2V
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SSDth 3.7kA, +2,-12.8V
SSDth 3.7kA, +2,-12.8V
710373
3.7kA 45 +2,-12.8V
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SSDth 3.7kA, +2,-16.4V
SSDth 3.7kA, +2,-16.4V
710374
3.7kA 45 +2,-16.4V
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SSDth 3.7kA, +2,-20V
SSDth 3.7kA, +2,-20V
710375
3.7kA 45 +2,-20V
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SSDth 5kA, +2,-2V
SSDth 5kA, +2,-2V
710500
5kA 45 +2,-2V
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SSDth 5kA, +2,-5.6V
SSDth 5kA, +2,-5.6V
710501
5kA 45 +2,-5.6V
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SSDth 5kA, +2,-9.2V
SSDth 5kA, +2,-9.2V
710502
5kA 45 +2,-9.2V
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SSDth 5kA, +2,-12.8V
SSDth 5kA, +2,-12.8V
710503
5kA 45 +2,-12.8V
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SSDth 5kA, +2,-16.4V
SSDth 5kA, +2,-16.4V
710504
5kA 45 +2,-16.4V
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SSDth 5kA, +2,-20V
SSDth 5kA, +2,-20V
710505
5kA 45 +2,-20V
Call to order