Push button switch is a kind of electrical appliance that acts when pressed and resets when released, which is used to turn on and off small current circuits. It is generally used in the control circuit with AC / DC voltage below 440V and current less than 5A. Generally, it does not directly operate the main circuit, but can also be used in interconnected circuits.
In actual use, in order to prevent misoperation,push button switches are usually marked or painted with different colors, including red, yellow, blue, white, black, green, etc. Generally, red indicates operation under “stop” or “dangerous” conditions; Green means “start” or “on”. The emergency stop button must be a red mushroom head button. The button must have a metal protective retaining ring, and the retaining ring shall be higher than the button cap to prevent accidental touch of the button and misoperation. The material of the button board and button box for installing the button must be metal and connected to the main grounding bus of the machine.
In the proximity switch, there is a component that has the ability to “perceive” the object approaching it, that is, the displacement sensor. It can use the sensitivity of the displacement sensor to the approaching object to achieve the purpose of controlling the switch on or off. The object moves from the switch to the […]
(1)(Push button switch)Always check the button to remove dirt. Due to the small contact spacing of the button, after years of use or poor sealing, dust or oil emulsion will flow in, resulting in reduced insulation and even short circuit accidents. In this case, insulation and cleaning treatment must be carried out, and corresponding sealing […]
Precautions for using button switchesThere is a big difference between the button switch capabilities in AC and DC circuits, and the control capacity is very low in DC applications. This is mainly because DC does not have a zero point like AC, so it is difficult to eliminate the arc once it occurs, and the arc […]
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