The design and test of Metal Oxide Surge Arrester is complied full with IEC99-4.
Arrester is the basic factor of insulation cooperation during all electric appliances (transformer, reactor, condenser, generator, motor, PT, CT, cutout and contactor) in electric network. Insulator's protecting property decides all electric appliances' insulation index such as short time power frequency withstand voltage, lightning impulse withstand voltage and switching withstand voltage.
Metal Oxide Arrester is the new arrester promoted by USA and Japan in 1980's. It's the most advanced product in regular arrester field. China has digested the technology for years after importing the technology in the middle of 1980's, and now Chinese professional arrester manufacturers produce arresters as good quality as that from USA, Japan or European countries. Arresters that meet all Chinese Standard will meet all IEC requirements.
Core working element of this series product is fired by multi metal oxide powder mainly zinc oxide, as a result, this series arrester has good performance at fast steep wave corresponding, big through-capacity. Products with gaps adopt boasting gap and equalizing irradiation, which reduces the electric discharge dispersion and impact coefficient.
Adoption of insulation cover goes with the tide of miniaturization and security trend of international electric product. Comparing with the traditional inorganic materials like porcelain or glass, polymer organic composite material has more advantages such as small size, light weight, pollution resistance, free cleaning, explosion resistance and shock resistance. It's the first choice of lightning protection component in integration and large scale medium and high voltage transmission set equipment.Working Conditions:
- Environment temperature: -40ºC ~ +40ºC
- Altitude: no more than 2000M
- Power frequency: 5±2Hz, 60±2Hz
- Earthquake under 7 level
- Max wind speed no more than 35M/s
- No cleaning required condition: medium and the following pollution area
- For gapless product, long time applied power-frequency withstand voltage doesn't exceed the arrester continuous running voltage
- For with-gap product, rise of installation short time power frequency withstand voltage doesn't exceed arrester's rated voltage
- Special requirements should be raised up in PO if products are used under the following irregular circumstances
- Areas with irregular temperature or altitudes (such as plateau, tropic, cold zone, used in a total enclosed switchgear or close to electric stove)
- There are severe moisture or corrosive gases in working environment (such as above water, salt field or chemical plant)
- Super ultraviolet ray radiation (such as plateau and strong sunlight shining dry area)
- Heavy pollution area (such as mine or construction site)