How to control the current of the key switch, today we will introduce these aspects to you, I hope you can understand these problems.
How should the key switch control the current passage? Key switch can be divided into low-voltage plastic case key switch and low-voltage frame key switch, the former is used for low-voltage small current, the latter is used for low-voltage large current, the low-voltage plastic case circuit breaker commonly known as automatic key switch.
1. Circuit Breaker: A mechanical switching apparatus that can turn on, load and break the current under normal conditions, and can also turn on, load and break the current under specified abnormal circuits (such as short circuits).
2. Plastic case circuit breaker: A circuit breaker with a shell made of molded insulating material as the integral part of the circuit breaker.
3. Air circuit breaker: circuit breaker with interruption and closing of air at atmospheric pressure.
4, easy to use and safe. The product of the manufacturer of the light touch switch can be conveniently opened or closed for easy use, and can not obviously hinder the movement or movement of the person or object in the building when it is opened and closed. And should be able to clean and clean the floor. Ground sockets should have different protection levels to adapt to different requirements of the use of the environment to ensure the safe use of users.
The key switch is reset after power failure, i.e. the locking mechanism should work on the power supply. The finished product does not seem to be available, because the requirement can be achieved by using a circuit consisting of a general button switch and a relay; but if only one relay (or contactor) is used, a set of its normal open contacts are used to control the relay (contactor). Working coil power supply, the relay weighing iron as a switch button, after pressing the weighing iron, the relay control coil contact closed, coil power, relay to maintain the suction (self-locking), the rest of the contact control other lines.