一、適用范圍Sphere of application
   BK系列控制變壓器適用50~60HZ電壓至500V的電路中，通常用作機床和機床設備中一般電器的控制電源，或局部照明燈及指示燈的電源之用。
   BK series control transformer for 50~60Hz voltage to 500V circuits machine tools and mechanical equipment commonly used in the general control of electric power, or local lighting and power indicator light purposes.
二、使用環境Working condition
2、1周圍空氣溫度-5℃至+40℃，24小℃時的平均值不超過+35%；
2、2安裝地點海拔不超過2000m,
2、3大氣相對濕度在周圍空氣溫度為+40℃時不超過50%，在較低溫度下可以有較高的相對濕度，最濕月的平均相對濕度為90%，同時該月的平均最低溫度為+25℃，
2、1 The ambient air temperature of -5℃to +40℃,24-hour average does not exceed+35℃；
2、2 Installation site altitude does not exceed 2000m;
2、3 The atmospheric relative humidity in the ambient air temperature is +40℃less than 50%,
 at a lower temperature can have a higher relative humidity,the average maximum humidity of 90%,while the monthly average minimum monthly temperature to +25℃.
三、結構特點Structure
   BK系列控制變壓器是經過多年來進一步國內外同類產品的優點，采用先進工藝和嚴謹設計進行制造，并優選國外先進方法的接線端子，具有性能優良、工作可靠、耗能低、體積小、接線安全、防護等級高、適用性廣等特點。在額定負載下能長期工作，是一種理想的變壓電源。
  BK series control transformer is the result of similar at home and abroad for many years to further absorb the advantages of using advanced manufacturing techniques design,and advanced optimization methods terminals,with excellent performance, reliable operation, low power consumption, small size,wiring security, protection levvel high, wide applicability and so on. Rated load in the long-term work is an ideal transformer power supply.