The push button switch is an electrical component that can complete basic controls such as starting, stopping, and changing speed. 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. This article will introduce several common questions about push button switches.
How to Judge Whether a Button Switch Is Normally Open or Normally Closed
Push button switch refers to the use of buttons to push the transmission mechanism. This switch makes the movable contact and the static contact press on or off and completes the circuit connection. The push button switch is a main electrical appliance with a simple structure and a wide range of applications. If you want to know function of push button switch you can read this article
- You can tell it by the color of the wiring port. If the terminal is blue or green, it is a normally open contact. If the wiring port is red or pink, it is a normally closed contact. In order to prevent incorrect operations, we should remember that different colors represent different meanings.
- If the color cannot be used to distinguish whether the button switch is normally open or normally closed. Generally speaking, the upper end is normally closed, and the next one is normally open. This is also the simplest method, but there may be deviations.
- The more formal method is to use a digital multimeter to identify. You need to first adjust the digital multimeter to the on-off position, and then use the two test leads to touch different contacts. If a buzzing sound is emitted, it means that the contact is normally closed. Otherwise, it indicates a normally open contact.
Waterproof System for Metal Push Button Switches
The waterproof push button switch is a switch that can be operated even with wet hands. The main evaluation standard for the waterproof performance of waterproof switches in the market is the IP waterproof grade. The IP waterproof level usually has two numbers, the first number is from 0 to 6, and the highest level is 6. The second number is from 0 to 8, with the highest level being 8. Therefore, the highest waterproof level of waterproof push button switch is IP68. Bulkswitchmarts’ waterproof push button switches have reached this waterproof level.
- Waterproof push button switch can be used to isolate power supply. Disconnect the high-voltage maintenance equipment from the live equipment so that there is an obvious and visible disconnect point between them.
- The waterproof metal switch cooperates with the circuit breaker and operates according to the needs of the system operation mode. This changes the system operation wiring method.
- Pay attention to these matters when operating electrical switches. When the line is transmitting power, first connect the waterproof metal switch on the bus side, then the waterproof metal switch on the line side, and then the circuit breaker. When there is a power outage on the line, the circuit breaker should be turned off first, and then the waterproof metal switch should be opened.
Push Button Switch Welding Common Problems
When consumers use pin-type push button switches and signal indicators, new products are often damaged due to improper welding operations. Special attention needs to be paid to the following aspects during electric welding operations:
- Use suitable electrical network to speed up electric welding. It is recommended to use a 20W electric network, complete the welding within 3 seconds, and the welding temperature should be controlled at 230°.
- The flux paste must be appropriate. When welding, keep the button pins facing down as much as possible. Prevent multiple welding attempts from causing pin breakage.
- Use plug-in terminal blocks as much as possible to avoid welding connections.
- Do not change the direction of the button switch pin at will to prevent changes in the internal structure and cause abnormal button detection.
- Use a suitable working voltage for LED lights to prevent inappropriate working voltage from causing the LED lights to not light up or burn out.