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Some of the most common common sense of metal button switches

Some of the most common common sense of metal button switches
When the metal button switch is pressed, the two pairs of contacts act at the same time, the normally closed contact is disconnected, and the normally open contact is closed. In order to indicate the function of each button and avoid misoperation, the button caps are usually made into different colors to show the difference. The colors are red, green, black, yellow, blue, white, etc. The button switch can complete basic controls such as start, stop, forward and reverse rotation, speed change and interlock. The main parameters, type, mounting hole size, number of contacts and current capacity of the button switch are specified in the product imitation list. For example, red means the stop button, green means the start button, etc. Usually each push button switch has two pairs of contacts. Each pair of contacts consists of a normally open contact and a normally closed contact.

Common button categories and features:
Open type: suitable for embedded installation and fixed on the switch board,
On the panel of the control cabinet or console.
Protective type: with a protective shell, which can prevent the internal button parts from being mechanically damaged or people touching the live parts.
Waterproof type: with a sealed shell to prevent rainwater from intruding.
Anti-corrosion type: can prevent the intrusion of chemical corrosive gas.
Explosion-proof type: It can be used in places containing explosive gas and dust without causing explosion, such as coal mines and other places.
Knob type: Rotate the operation contact by hand, there are two positions for on-off, generally panel-mounted.
Key type: Use the key to insert and rotate to operate, which can prevent misoperation or be operated by a dedicated person.
Emergency: There is a big red mushroom button head protruding outside.

Post time: Apr-27-2021

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