一、概述 Summarization

        YDK(BK)系判控制变压器是在国内BK系列控制变压基基础上，经过多年来进一步吸收国内外同类产品的优点，采用
先进工艺和严谨设计进行制造，并优选国外先进方法的接线端子，具有性能优良、工作可靠、耗能低、体积小、接线安全，
适用性广等特点，是一种理想的变压电源。

         YDK(BK)series control transformer,based on domestic BK series control transformer,has further assimilated the excellence of similar
products both here and abroad and taken adva-ntage of technic and precise design to make products.With so many advantages,such as
excellent performance, reliable operation,low dissipation of energy,small volume,safe wiring,wide application and etc,it is a king of perfect
transformer power. BK series machine control transformer is available in AC circuit of 50-60Hz,rated power voltage up to 1000V,It is norm-
ally usedas controlling power source formachine tool and mechanical equipment,power for work lighting and signal lamp,which is can also
be used as pint-sized drive power.

二、用途 Usage

        YDK(BK)系判控制变压器(以下简称变压器)，适用于50~60Hz，额定电源电压不超过1000V的交流电路中，作为机
床和机械设备的控制电源，工作照明及信号灯电源；也可作为小型动力电源使用。

         YDK(BK)series control transformer(here after called transformer), can be used in the circuit with frequency of 50~60Hz, and ratd supply
voltage less than 1000V AC. It can be used as the control power resource for the machine tool and mechanical facil facilities, and for the work
illumination and signal lights; it can also be used as the small power source.

三、型号及其含义 The code N o. And meanings

四、使用环境和正常工作条件 Working Condition

海拔高度不超过2000mm；
最高环境温度为+40℃，最高月平均气温不大于+30℃，年平均气温不大于+20℃；
空气相对湿度不大于95%；
环境空气中，不含有腐蚀金属和破坏绝缘的有害气体或尘埃；使用中，不得使变压器受到水、雨、雪的侵蚀；
电源电压波形近似于正弦波。

Should not be installed over 2000m above sea level.
The highest ambient temperature is+40℃ the highest monthly average temperature should not be higher than+30℃ and yearly
average temperature should not be higher than+20℃.
Air relative humidity should be less than95%.
There mustn’t be harmful gas or dust that contains corrosive metal andinsulation-destroy matter in ambient air It should avoid the
corrosionof water,rain and snow in using.
Power voltage wave-form closes to sine wave.

五、外形及安装尺寸 Shape and mounting dimension