Specifications

material: ZnO varistor, sillicon rubber
one piece mould construction
hot dipped zinc fittings
can replace porcelain arrester

12KV  surge arrester

 

 

Main Principle:

 

The Zinc Oxide Surge arrester is the most advanced over-voltage protector in the world. This is due to the incorporation of a zinc oxide arrester as the core resistor disc.

 

This allows an improvement in the volt-ampere characteristics of the resistor disc and an increase in through-current capability in over-voltage situations, which is a drastic improvement when compared to conventional silicon carbide arresters. Under normal operating voltage, the current through the arrester is only one micro-ampere degree. When the arrester experiences an over-voltage situation, the excellent non linear characteristics will increase the current through the arrester several thousand times. The arrester is in the conducting state and will release the over-voltage energy to earth and thereby protecting power transmission equipment against the effects of over-voltage.

 

Technical Performance:

 

Typical types of 0.22KV to 220KV polymer housed metal oxide surge arrester (YH series) is in accordance with national standard technical requirement of GB11032-2000 (IEC60099-4, T8952 -2005, IEEE.C62.11)

 

Keystone:

The zinc oxide arrester is the most advanced over-voltage protector in the world, due to make the resistor disc of core component mainly adopt zine oxide arrester, compared with the conventional siliconcarbide arrester,  this presciption of the product improves greatly the volt-Ampere charateristics of the resistor disc and increased through-current capability at over-voltage so as to bring a radical changes for the characteristics of the arresters.

 

Normal service conditions:

 

1.The ambient air temperature is no higher than +40 degree. no lower than -40 degree.

2.The altitude above sea level does not exceed 2000m

3.Power frequency 48Hz~62Hz

4.Maximum wind speed does not exceed 35m/s

5.The earthquake intensity does not exceed 7 degrees

6.The voltage that long-time exerted shouldn't exceed its Max MCOV

 

Technical standard:

the technical performance of the product is in confirm to IEC60099-4, IEC37-199/CDV, standard technical requirements.