Vacuum circuit breakers are generally divided into a plurality of voltage levels. Low type generally used for explosion-proof electrical use. Like mine, etc. The main structure of the vacuum circuit breaker consists mainly of three parts: a vacuum interrupter, electromagnetic or spring actuator, brackets and structure of his parts. Vacuum breaker breaker technical standards in our country over the past decade has been vigorous development. Products from the past ZN1 ~ ZN5 several varieties grown to more than tens of models, variety, rated current up to 5000A breaker manufacturer Xi'an, breaking current 50kA reach a better level of Xian Huayi power circuit breaker on the election, and has voltage up to 35kV level of development. 80 years ago Which is better, Xi'an breakers, vacuum circuit breakers at the initial stages of development, Xi'an breaker technology continues to explore, develop technical standards can not be until 1985 before the development of relevant product standards. Welcome to inquire buy! Within ZN28A-12 series indoor high voltage vacuum circuit breaker (within ZN28-12 integrated indoor high voltage vacuum circuit breaker) ◆ use of environmental conditions Ambient temperature:. -10 ℃ ~ + 40 ℃ (allow storage at -30 ℃ when);. Relative humidity: daily average of not more than 95%; on average less than 90 percent; daily average saturated vapor pressure of not more than 2.2kPa; Altitude: not exceed 2000m (2500 plateau type); saturated vapor pressure of not more than the average monthly 1.8kPa; Earthquake intensity: not more than 8 degrees; no fire, explosion, serious contamination, chemical corrosion and severe vibration. Welcome to inquire! Which Xi'an breaker looking to buy? Xi'an circuit breakers, power is supplied by the Xi'an Huayi Huayi power plant. Xian Huayi power plant (www.xahy.com) strong, credible, in Xi'an high-voltage circuit breakers and other industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi power and you hand into the brilliant, for a better future!