The frame current rating of a plastic case circuit breaker is the rated current of the maximum release device that can be fitted to a frame of the same basic dimensions and plastic case. Circuit breaker current rating is the current through which a circuit breaker striker can pass for a long period of time and is also referred to as the circuit breaker striker rating.

For example, there are multiple frame rating currents for the same series, and multiple current ratings for the same frame rating. For example, the DZ20 series has 100, 225, 400, 630, 800, 1250 and other frame level rated currents. 100 frame level rated currents are 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100 225A frame level rated currents are 100A, 125A, 160A, 180A, 200A, and 225A rated currents. For example, a production company on the market in the production of products DZ20 series of molded case circuit breakers, product models DZ20-100 and DZ20-225 two case frame rating has a rated current of 100A, the volume, shape and breaking capacity of the circuit breaker is different, the model that the specific situation if you do not know much about this information, please call directly to Taisi Electric customer service. The rated current rating is selected according to a (1.25 ) priority factor. One is to meet and satisfy the need for maximum line and electrical component rated currents. Secondly, it is standardised for optimum use and processing of the conductor. It therefore specifies classes 3(6), 8, 10, 12.5, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400 According to this provision, only 100A specifications can be selected when the calculated load of the line is 90A, thus affecting the protection performance to some extent.

The detrigger current rectification value is the value of the detrigger adjusted to the action current. This is a multiple of the rated current In and is the action current value. Overcurrent is adjusted to 1.2, 1.3, 5, 10 times the current when writing Ir = 1.2In, 1.3In, 5In, 10In, etc. At present, some electronic decouplers can control overload, long time delay, rated current, the regulated current is actually the rated current, the maximum current that can be passed for a long time.

Rated action current refers to the actual action current of the contact at a certain action voltage when the auxiliary contact (accessory) is installed, the current is 3A or 6A for the control and protection of the circuit.

About the flying arc distance of plastic case circuit breaker, here is only a brief introduction.

Plastic circuit breaker in cutting off the larger short-circuit current, its movable, electrostatic contact separation will produce an arc, part of the arc or ionized gas from the circuit breaker power side of the arc spray mouth. The arc itself is a huge current that can easily cause phase shorts and grounding accidents between bare conductors and between bare conductors and "ground" (the metal casing of the equipment is earthed). To ensure safety, the user should maintain a certain distance according to the data provided in the manufacturer's catalogue or operating instructions. Distribution cabinet, cabinet height distance is not enough, you can choose the flying arc distance is small or zero flying arc products, with Taisi Electric plastic case circuit breaker by Taisi Electric professional and technical personnel to detect the flying fox distance, increase the arc extinguishing mechanism to ensure the safety of electricity.

Although many people usually ignore the shell circuit breaker structure grade and flying arc distance characteristics, but in fact they are also an important part of the shell circuit breaker, plays an important role and deserves attention.