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Blue Illuminated Anti Vandal Latching Push Button Electric Switch Waterproof IP67
Push button electric switch, also known as a control button (button for short), is a low-voltage electrical appliance that can be reset manually and generally automatically.
Electric Switch is usually used in circuits to issue start or stop instructions to control the on and off of electrical coil currents such as electromagnetic starters, contactors, and relays.
An electric switch is an electrical appliance that is used to switch on and off small current circuits that is pressed to act, and released to reset. It is generally used in control circuits with AC and DC voltages below 440V and currents less than 5A. Generally, the main circuit is not directly manipulated, and it can also be used in interconnecting circuits.
In actual use, in order to prevent misoperation, the push button electric switch is usually marked or painted in different colors to distinguish it. The colors are red, yellow, blue, white, black, green, etc.
Generally, red means “stop” or “dangerous” operation; green means “start” or “on”. The emergency stop button must be a red mushroom button. The Electric Switch must have a metal protective retaining ring, and the retaining ring should be higher than the button cap to prevent accidental operation of the button.
The material of the button board and button box for installing the electric switch must be metal and connected to the main ground bus of the machine.
Push button electric switch has many types of structure, which can be divided into common snap button type, mushroom head type, self-locking type, self-reset type, rotary handle type, indicator type, illuminated symbol type and key type, etc., there are the single buttons, Double button, I button and different combinations.
Generally, it adopts a water accumulation structure, which is composed of a button cap, a return spring, a static contact, a moving contact, and a shell. It is usually made into a composite type, with a pair of normally closed contacts and normally open contacts. Some products can pass through, The series connection of multiple elements increases the number of contact pairs.
There is also a self-holding button, which automatically maintains the closed position after being pressed, and can only be opened after the power is cut off.
When the button is not pressed, the moving contact is connected to the static contact above, and this pair of contacts is called a normally closed contact.
At this time, the moving contact is disconnected from the static contact below, and this pair of contacts is called normally open contacts:
Press the button, the normally closed contact is disconnected, and the normally open contact is closed;
Release the button and restore the original working state under the action of the return spring.
(1) According to different occasions and specific purposes:
Choose the type of electric switch according to the use occasion, such as open type, protective type, waterproof type, anti-corrosion type, etc.; choose the appropriate form according to the purpose, such as handle rotary type, key type, emergency type, and lighted type.
For example, the General Electric switch on the panel of the console cabinet can be opened first; if the working status needs to be displayed, use the indicator type; in very important places, in order to prevent unrelated personnel from misoperation, the keyed type should be selected; Use anti-corrosion type for gas.
(2) Choose the color of buttons and indicator lights according to the requirements of working status, instructions and working conditions:
Green is used to indicate “start” or “power on”, and red is used to indicate “stop”. In addition, the voltage of the indicator light (bulb) is divided into 6.3V, 12V, 24V and so on.
(3) Determine the number of different buttons according to the needs of the control loop:
Such as single button, double button, three button, multi button, etc. For example, when three kinds of control of “forward”, “reverse” and “stop” are required, three buttons can be used and installed in the same button box; when only “start” and “stop” control are required, two buttons are used to assemble them Inside the same button box.
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