What is a solid state coupler?

Solid state de-coupler

The threshold voltage of SSD is -2V/+2V. The threshold voltage may be the absolute voltage, or the peak voltage, at which the switch occurs. This voltage is the sum of the current and peak AC voltage across two whole cities of the isolator. It was first developed and put into the market by RUSTROL, a Canadian anticorrosive equipment giant. Due to its high price, ISSD series solid-state decoupler produced by Jinran Electric (Qingdao) Co., LTD., its joint venture manufacturer, is mostly adopted in mainland China. This allows for very low and safe clamp voltages across the SSD terminals. Only the shortcomings, the impression of foreign high-end components production capacity, less inventory, slightly longer supply cycle.

As a DC isolation and AC coupling device, SSDS are used to prevent cathodic protection current from reaching a predetermined threshold voltage, while also conducting the induced AC. This mode of operation can be performed countless times, usually due to ac fault current or lightning current. SSDS are widely used in cathodic protection systems because of their light weight and non-metallic enclosures. Solid state couplers arise, which can effectively eliminate all kinds of stray current higher than cathodic protection requirements, and prevent lightning damage, coupling AC voltage.

In pipeline cathodic protection due to mostly buried pipeline, pipe coating insulation effect is good, now have a negative effect is the increase in the number of stray current coupling, once the pipeline through the high-voltage lines, or electric railways, power plants, such as interference sources, interference, its easily stray current, even some of high voltage large current can damage the potentiostat cathodic protection.

The SOLID-state decoupler (SSD) series continues DEI's tradition of providing innovative anticorrosive products to the anticorrosive industry, using DEI's own solid-state technology. [1]

The coupler uses advanced solid-state technology. When the voltage diagram exceeds the threshold voltage, the SSD switches to short circuit mode immediately to provide overvoltage protection. When the overvoltage passes, it automatically switches back to the DC isolation mode.

. As a result, the whole CATHOdic protection project cannot be put into operation, and the pipeline loses protection, which affects the life of the pipeline.