Introduction of zno varistor:
The Zno varistor is the core element of MOA, which is mainly made by Zinc Oxide. MOV(Metal Oxide Varistor)has greatly mended voltage-current characteristics and improved through-current capability, thereby to line up protection.
Our company produces series of varistors for polymeric housing arresters from 0.22kv to 330kv, and passed ISO9001-2000 International Quality Management System Recognition. If you will inquire surge arrester/lightning arrester, please click it.
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Characteristics of Varistor:
- High current withstanding: over the standard requirement on the items of 2ms rectangular impulse current withstand, Residual voltage impulse, 8/20µs nominal lightning impulse current, 4/10μ high current impulse withstanding
- Excellent aging function: why will zno varistor have good aging test function? The aging coefficient of resistance is less than 0.9 after aging test at 115℃ and 1000h corresponding charge rate.
- Excellent protection characteristics: Residual ratio reached the leading level according to IEC standard.
- High gradient: up to 300-400V/mm.
a corner of workshop
Complete QC system:
Changsha rich power company has an excellent production line and complete QC system including DC 1mA reference voltage, Leakage current ,2ms rectangular impulse current withstand, Residual voltage impulse, 8/20µs nominal lightning impulse current, 4/10μ high current impulse withstanding.
If you will check the QC items about surge arrester/lightning arrester, please click it.
Inspection
Parameter list of normal types varistors 
Parameter list of High gradient type varistor
