What is the main function of the relay coil? We should all be aware of the role of the relay. As long as a certain voltage is applied to both ends of the coil, a certain current will flow in the coil, which will produce electromagnetic effects. The armature will overcome the pull of the return spring under the action of electromagnetic force.

Switches are often used in life, and there are two types of switches, load switches and circuit breakers, both of which can connect and cut off circuit power, but circuit breakers have over-current and overload protection. The following is a specific introduction to the difference between the two.

The problem of household electrical circuits is very important, especially now that more and more electrical appliances are used in the family, so the leakage protection switch is essential. The leakage circuit breaker can have a good protective effect. Today, I will focus on the wiring of the leakage protection switch and Precautions.

The electrical clearance of electrical products must be based on the insulation coordination of the low-voltage system, and the insulation coordination is based on the instantaneous overvoltage being limited to the specified impulse withstand voltage, and the instantaneous overvoltage generated by the electrical appliances or equipment in the system must also be lower than The impulse voltage specified by the power supply system. therefore:

When the new house is renovated, the general decorator will suggest that the owner install a small circuit breaker (that is, an air switch), in order to protect the electrical safety of the home. This is because when the home circuit breaks down, the circuit breaker can automatically trip and cut off the power, thereby reducing accident losses.

Low-voltage circuit breakers have overload and short-circuit protection functions. According to their structure, they can be divided into frame circuit breakers (ACB), molded case circuit breakers (MCCB), and miniature circuit breakers (MCB).

Brief introduction of power meter What is a power meter? It is also called a wattmeter, which is an instrument for measuring electrical power. Electric power includes active power, reactive power and apparent power. Without special instructions, the power meter generally refers to an instrument that measures active power.

Watt-hour meter model picture and brand manufacturer Electricity meter brand manufacturer

What is a transmitter? Generally speaking, we usually call a sensor as a sensitive component. Its main function is to convert the measured physical quantity into an electrical signal. The thermistor is of this type, which can convert temperature into a change in resistance signal.

What is the role of the isolation transformer? Simply speaking, the two phases can be electrically isolated, so as to prevent accidents from electric shock. In fact, the isolation transformer is a kind of safety power supply, which is usually used for protection, lightning protection and filtering during machine maintenance.