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What are the classification of button switches
First, the button switches are classified according to the purpose and the structure of the contacts
1. Normally closed button 2. Normally open button 3. Compound button
2. The button switch can be classified according to operation mode and protection mode.
Common button categories and features:
1. Waterproof type: with sealed shell, it can prevent the intrusion of rainwater. The code name is S.
2. Anti-corrosion type: it can prevent the intrusion of chemical corrosive gas. Code-named F.
3. Explosion-proof type: It can be used in places containing explosive gas and dust without causing explosion transmission, such as coal mines and other places. Code-named B.
4. Knob type: Rotate the operating contact by hand, there are two positions of on and off, generally panel mounting type. The code name is X.
5. Key type: Use the key to insert and rotate to operate, which can prevent misoperation or for special person to operate. The code is Y.
6. Open type: It is suitable for embedded and fixed on the panel of the switch board, control cabinet or console. Code-named K.
7. Protective type: with protective shell, it can prevent the internal button parts from being damaged by mechanical or people touching the live parts, the code is H.
8. Emergency type: There is a big red mushroom button protruding out, which is used to cut off the power in case of emergency. The code name is J or M.
9. Self-holding button: The button is equipped with a self-holding electromagnetic mechanism, which is mainly used in power plants, substations or test equipment. Operators communicate signals and give instructions, etc., which is generally panel operation. The code name is Z.
10. Illuminated button: The button is equipped with a signal lamp, which is used as a signal indication in addition to issuing operation commands, and is mostly used on the panel of the control cabinet and console. Code-named D.
11. Combination: multiple button combinations. The code name is E. 12. Interlocking: Multiple contacts are interlocked with each other. The code name is C.