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Solid state decoupler

Solid state decoupler

Solid state decoupler

 

Introduction
The Ruidesen ZD series solid state decoupler(patent number:ZL 2012 3 0008634.3,passed GB/T19001-2008/ISO9001:2008 certificate of quality management system cetification,API Specification Q1,Xi'an High Voltage Electrical Apparatus Research Institute test report, Tianjin Electrical Technology Research Institute Mechanical Industry Instrument Transformer And Low Voltage Electrical Products Quality Tesing Center test report) can effectively eliminate the influence of stray currents, fault current and lightning surge current on the buried steel pipelines and metallic structures, to ensure the safe operation of buried steel pipelines and metallic structural.

Application Scope
● Grounding for lightening, AC decoupling, DC clamp drainage of the cathodic protection system.
● Provide lightning protection and other high-voltage fault current protection for pipeline insulation joint.
● Eliminate and reduce the interference of the AC induction voltage to the long-distance pipeline.
● Different metallic decouling. 

Features
● Adopt the advanced solid-state technology, can effectively control the effects of the AC stray currents or lightning current to the buried pipelines; extend the service life of pipelines.
● Low AC impedance, nS reponse time, which can instantly conduct the fault current, lightening current and AC current.  
● Threshold voltage of the decoupler is -2V / +2 V,-1.8V / 1.8V , -1.5V/+0.7V , and the customer can select the appropriate model.
● The DC leakage current at the blocking voltage for any ZD model is normally less than 10 milliamperes, and less than 1mA when cathodic protection voltage is -1.5V(from -45℃ to 60℃)
● The ZD series solid state decoplers use proven solid-state components which have an instantaneous response with respect to voltage, thereby initiating voltage clamping immediately when the voltage attempts to exceed the blocking level to make the clamping voltage of the protected body very low and safe.
● The ZD series solid state decoplers belong to no-power drainage product. Within the scope of technical indicator, it can withstand numerous non-continuous lightning currents and AC fault currents. Sevice time shall be not less than 8 years. 
● According to different application conditions and drainage protection requirement, we have developped different types of ZD series solid state decooupler. 

Main technical parameters

 

 

Item                Model

ZDRE5.0

ZDFL1.0

ZDDL2.0

Blocking voltage rating(leakage current ≤1mA)

-2V/+2V

-2V/+2V

2V/+2V

Lightning surge current discharge current capacity
Rating (8/20μs)kA

100KA

120KA

100KA

Steady State AC Current Rating(-2V/+2V)

≤45A

≤50A

≤50A

DC leakage current(-1.5V/+1.5V)

≤1mA

≤1mA

≤1mA

Fault current (AC-rms/power frequency/30 cycle)

≥3500A

≥3800A

≥5000A

Working temperature

-45°C~
+60°C

-45°C~
+60°C

-45°C~
+60°C

Level of production

IP65

IP65

IP65

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