AC Zinc Oxide Varister Block for 110-220kv Surge/Lightning Arrestor
AC Zinc Oxide Varister Block for 110-220kv Surge/Lightning Arrestor image
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Metal Oxide Varistor is the core of the arrester,which main component is Zinc Oxide and with a small quantity of bismuth oxide,Silicon.Oxide,
cobalt.oxide,nickel.oxide fluoride oxide,manganous carbonate,antimony oxide and other gleam of additive and made with high temperature.
Metal Oxide Varistor’s microstructure mainly constitute of Zinc Oxide grain,grain boundary layer and Chienshih phase. Ard its electric
conduction principle lies that Zinc Oxide grain has good electro conductibility, and the voltage to the Zinc Oxide is almost act on high resistant
grain boundary layer. Varistor’s nonlinearity mainly comes from grain boundar layer (the main ingredient is bismuth oxide) Chienshih phase
scattered throughout the grain boundary layer which is the multiple oxide of Zinc Oxide and bismuth oxide. Its function lies in restraining the
growing of Zinc Oxide grain to make the better nonlinearity.
Type | Dimension mm | D.C.U 1mA voltage kV |
0.75 U 1mA Leakage current μA |
10kAResidual voltage ratio U10kA/ U1mA |
Current impulse withstand A | Non-linear ocefficient 10μA~1mA |
Ageing test 115ºC,1000h |
|||
Out Diameter |
Inside Diameter |
High | 2ms Rectangular | 4/10μsHigh current | ||||||
D6 | 61±1 | 21±0.5 | 4.6~5.3 | 15 | 1.71 | 700 | 100 | 17 | Chargeability85% Kct≤1.2 |
|
D7 | 72±1 | 26±1 | 22.5±0.5 | 4.2~5.3 | 15 | 1.69 | 800 | 100 | 16 | |
D8 | 86±1 | 26±1 | 22.5±0.5 | 4.0~5.2 | 15 | 1.67 | 900 | 100 | 14 |
Our products have being in service on electrical networks of more than more than 20 countries from 2005.
We had supplied our products and services to the below customers:
CHINESE STATE GRID,KENYA KPLC & REA,UGANDA REA & UMEME,TANZANIA TANESCO,GHANA ECG,SOUTH AFRICA ESKOM & ARB,NIGERIAL NEPA,COTE D’IVOIRE CI-ENERGIES,JORDAN EDCO & NEPCO,OMAN PDO,VIETNAM EVN,MEXICO IUSA,ECUADOR CELEC,NEPAL NEA,
……….
Here, We look forward to your joining.
Our factory had obtained ISO9001, ISO14001, OHSAS 18001, and almost of our products had been tested by CNAS certificated Laboratory, for example KEMA, Chinese National Lab, and etc
What can we do for you?
1) Good quality guarantee (2 years).
2) Competitive Price (Factory direct price).
3) Agent service in all the world.
4) On time delivery .
5) We offer sample for free.
6) Professional Technology .
7) Quality Control through the whole Manufacturing process.
a. Check the material before the production .
b. Have the random inspection during the production .
c. Make the 100% inspection before the shipment
We are China AC Zinc Oxide Varister Block for 110-220kv Surge/Lightning Arrestor manufacture and supplier,You can get more details with Email,you will get cheap price or factory price.
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