polymeric housing 27KV surge arrester

Specifications

Appliation:
The ZnO arrester is mainly used to protect distribution transformer, cable connector and electric equipment from being damaged by lightning impulse voltage and operated over-voltage

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.

Specifications:
1) MOA rated voltage:27KV
2) MCOV:22KV
3) 1/10μs steep current impulse:84KV
4) 8/20μs lightning current impulse:74KV
5)30/60μs switching current impulse:63.5KV
6) 2ms rectangular current impulse withstand:250A
7) 4/10μs high current impulse withstand:100KA

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