腾讯分分彩官网直播

佛山市斯凯韦尔电子是专业设计制造浮球开关、液位开关、水流开关、接近开关、物位开关、料位开关、液位传感器、物位传感器、料位传感器。公司专营进口干簧管、液位仪表、物位仪表、料位仪表,在液位测量、物位测量、料位测量及液位控制、物位控制、料位控制方面有多年的经验。 
查看更多

联系热线:0086-757-82208956  82323721
公司传真:0086-757-82514068  82208946
电子邮箱:xxxxx@163.cn  

        lf@skyweal。com 

        sensors@diskvy.com  

联系地址:佛山市禅城区张槎一路华南电源创新科技园12554 

General informations

Reed Switches

 Capacitive Loads   

 

       Unlike inductive loads, capacitive and lamp loads are prone to high inrush currents which can lead to faulty operation and even contact welding.

      

   When switching charged capacitors (including cable capacitance) a sudden unloading can occur, the intensity of which is determined by the capacity and length of the connecting leads to the switch. This inrush peak can be reduced by a series of resistors. The value of these resistors is dependent on the particular application but should be as high as possible to ensure that the inrush current is within the allowable limits.

  


>> With lamp load applications  it is important to note that cold lamp filaments have a resistance 10 times smaller than already glowing fi laments. This means that when being turned-on, the lamp fi lament experiences a current fl ow 10 times greater than when already glowing. This high inrush current can be reduced to an acceptable level through the use of a series of current-limiting resistors. Another possibility is the parellel switching of a resistor across the switch. This allows just enough current to fl ow to the fi lament to keep it warm, yet not enough to make it glow.

       

      The above diagram illustrates a resistor/capacitor network for protecting a Reed Switch against high inrush currents. R1 and/or R2 are used depending upon circuit conditions.

Lamp load with parallel or current limiting

resistor across the switch

 

腾讯分分彩 极速赛车注册官网 腾讯分分彩 腾讯分分彩 极速赛车APP 腾讯分分彩 腾讯分分彩 腾讯分分彩 腾讯分分彩官网直播 极速赛车APP