Push Button Switches have two pairs of contacts?
Pushbutton Switches can complete basic controls such as start, stop, forward and reverse, speed change and interlock. There are usually two pairs of contacts for each Push Button Switch. Each pair of contacts consists of a normally open contact and a normally closed contact. When the button is pressed, the two pairs of contacts move simultaneously, the two pairs of normally closed contacts are opened first, and then the two pairs of normally open closed.
There are many types of Waterproof Push Button Switch, which can be divided into ordinary push-button type, mushroom head type, self-locking type, self-resetting type, rotary handle type, with indicator light type, illuminated symbol type and key type, etc. Buttons, three buttons, and different combinations, generally adopt a building block structure, consisting of a button cap, a return spring, a bridge contact and a shell, etc., usually made of a composite type, with a pair of normally closed contacts and normally open contacts, Some products can increase the number of contact pairs by connecting multiple components in series. There is also a self-holding button, which can automatically maintain the closed position when pressed.
The On Off Push Button Switches is a simple structured, widely used main electrical appliance. In the electrical automatic control circuit, it is used to manually send out control signals to control contactors, relays, electromagnetic starters, etc.
Also: Touch switches,Toggle Switches, ball switches, vibration switches, leaf switches, dip switches and other products
In order to indicate the function of each button and avoid misoperation, the button caps are usually made in different colors to show the difference. The colors are red, green, black, yellow, blue, and white. For example, red indicates a stop button, and green indicates a start button. The main parameters, type, mounting hole size, number of contacts and current capacity of the push button switch are described in detail in the product manual. Common domestic products are LAY3, LAY6, LA20, LA25, LA38, LA101, LA115 and other series.
