Outdoor a. C. High-Voltage Drop-out Metal Oxide Surge Arrester
A disconnector is incorporated in the type WDLB outdoor a.c. high-voltage drop-out MOA,and it will actuate during the MOA is damaged.Then it will drops out quickly and terminates its operation,and the system's single-phase earthing is avoided.
The type WDLB outdoor a.c. high-voltage drop-out MOA has the visibie disconnecting indication and is easy for exchanging when a failure occurs.The line does not need to cut off power supply,which brings out great convenience for an overhaul and maintenances of power lines.
Main Technical Parameters
Main parameters of outdoor a.c. High-voltage drop-out MOA
|System's nominal voltage |
|Lightning impulse withstanding ground/fracture (kv)|| |
Max,horizontal pulling force
Rated voltage of MOA
8/20µS high current discharge (kA)
|6||85||>150||10||20||30||The parameters of MOA accord with the selected MOA.|
Metal Oxide Surge Arrester(MOA) without Gaps for A.C.Sytems
MOA is composed of metal oxide varistors,housing(porcelain or silicon rubber),base,upper cover,grading ring etc.Our products have excellent performance in accordance with IEC international standard IEC600 99-4(2000) and China National Standard GB11032-2000 for "Alternating Current Gapless MOA".Polymeric housed MOA manufactured by AMTECH features small size,lightweight,simple manufacturing process,good sealing,explosion-proof,long working life,wounded-proof,high pollution resistance and reduced line maintenance,etc.
MOA Classification Code
Gapless arrester electrical parameter
|Type||Rated voltage||MCOV||Residual voltge(kv)|| |
Wave impluse withstand current
2000µ S square
4/10µ S high
|Steep impluse current||Switching impluse current|| |
8/20 µ Lightning impluse current
Zinc-oxide lightning arrester is the most advanced Over-Voltage Protector at present in the world. The voltage current characteristic of the varistor has been changed compared with traditional carborundum arresters due to the multiple metal oxide materials application in the core element-varistor,which has greatly improved the varistor's throughput capacity and brought thorough change to arresters'characteristics.
When arrester is under normal voltage,there is only microamp current through it .When it is under high voltage,arresters'excellent nonlinear voltage current feature gets into play,so the current through arresters will reach thousands of amperes and the arresters are at conducting status,releasing over-voltage energv to effectively protect the power transmission equipments from damage caused by over voltage.
Application and features
Zinc-oxide lightning arrester is protective equipment for electrical devices in A.C.power system from damage caused by over voltage or over-voltage operation.
Contact us if you need more details on Over-Voltage Protector. We are ready to answer your questions on packaging, logistics, certification or any other aspects about a. C. Power System、Lightning Arrester. If these products fail to match your need, please contact us and we would like to provide relevant information.
Product Categories : MOA Without Gaps