As a common power distribution management equipment, circuit breakers are widely used in homes and industries. They play a pivotal role in the electricity market. Circuit breakers are inseparable in almost all areas of electricity consumption. At present, the domestic market for smart cloud circuit
1. What is low-voltage circuit breaker? Low-voltage circuit breaker is a kind of mechanical switch and power distribution device used in low-voltage power grid that can connect, carry and break current under normal circuit conditions, and can also connect and carry a certain period of time and breaking current under specified abnormal conditions. .
Every household has a distribution box, which is the controller of the household circuit. Among the various parts of the distribution box, the selection of MCB and RCD is a problem worthy of attention.
The low-voltage distribution system consists of distribution substation, high-voltage distribution lines, distribution transformers, low-voltage distribution lines, corresponding control and protection equipment.
On March 4, the Standing Committee of the Political Bureau of the CPC Central Committee held a meetingThe new energy charging pile is included in the ‘new infrastructure’It has become the focus of national infrastructure construction.
Arc extinguishing is one of the important applications of circuit breaker, because the arc not only causes damage to the equipment line, but also affects the personal safety. Therefore, it is necessary to extinguish the arc.
Thermal relay is a very important part of the relay family, and the production is more frequently used, which is of great significance. This paper will introduce the working principle of the so-called thermal overload relay.
Determine the clearance of electrical products, must be based on the insulation of the low pressure system, and insulation coordination is based on instantaneous overvoltage is limited within the prescribed impulse withstand voltage
Molded case circuit breaker is to contact, arcing chamber, trip and operating mechanism has been packed in a plastic shell, generally do not consider the maintenance, applicable to the branch protection switch, overcurrent trip with thermal magnetic and electronic type two kinds
Contactor: it is to use on the main circuit system, control of a single device, such as an electric motor, is also a kind of switch, but it can be controlled, such as relay control, suitable for frequent movements, but average amount is small, no protection function, can't own tripping when accident;
What is the difference between 1P, 2P, 3P and 4P? How to choose?Let's get to know each other! For miniature circuit breakers, 1P+ N, 1P and 2P are commonly used as single-phase electrical control, but the effect is different.