Every household, a large number of power facilities, and automation equipment require the use of small circuit breakersHow to connect a small circuit breakerWhat about it? We had a face-to-face conversation with the electricians from Weikewei today to see how they provide installation guidance and suggestions to customers.

Low voltage circuit breaker (formerly known as automatic switch) is a switching device that can not only connect and disconnect normal load current and overload current, but also connect and disconnect short-circuit current. Low voltage circuit breakers not only play a control role in circuits, but also have certain protection functions, such as overload, short circuit, undervoltage, and leakage protection. There are many classification methods for low-voltage circuit breakers. According to the usage category, there are selective (adjustable protection device parameters) and non selective (non adjustable protection device parameters) types. According to the arc extinguishing medium, there are air type and vacuum type (mostly air type in China). The capacity range of low-voltage circuit breakers is large, with a minimum of 4A and a maximum of 5000A. Low voltage circuit breakers are widely used in various levels of feeder lines in low-voltage distribution systems, power control of various mechanical equipment, and control and protection of electrical terminals. With the research hotspot of smart grid at home and abroad, the "intelligence" and "communicability" of low-voltage electrical appliances will ultimately develop towards the direction of smart grid, forming the low-voltage user end industry of smart grid.

How to connect commonly used molded case circuit breakers and miniature circuit breakers? The two products are still different. Below are the specific differences and requirements.

1. Molded case circuit breakers can connect thicker wires, such as those over 35 square meters. Small circuit breakers are only suitable for connecting wires of less than 10 square meters.

2. The end of the molded case circuit breaker is connected with a nut, which is easy to press and has good contact. Small circuit breakers use smaller compression terminals and can only be tightened with a screwdriver. The torque is insufficient, making it difficult to compress and resulting in poor contact.

3. The molded case circuit breaker adopts two sets of devices for overcurrent and short-circuit protection, and the overcurrent protection action value can be manually adjusted. Mini circuit breakers share a set of devices for overcurrent and short circuit, and the current cannot be adjusted.

4. Small circuit breakers have a large distance between phases and are equipped with arc extinguishing enclosures, which have strong arc extinguishing capabilities and can withstand larger short-circuit currents without easily causing phase to phase short circuits. The lifespan is also long.

5. The sensitivity of miniature circuit breakers is higher than that of molded case circuit breakers.

Thank you to the electricians at Weikewei for providing customers with such a straightforward solution. If there are similar needs in the future, we will communicate and discuss with them to provide more valuable information to the users.