The current rating of a moulded case circuit breaker is the rated current of the maximum release that can be installed in a frame and in a moulded case of the same basic dimensions. The circuit breaker current rating is the current released by the breaker that can pass for a long period of time, also known as the rated current released by the breaker.

For example, there are multiple current ratings for the same series and multiple current ratings for the same rated current. For example, the DZ20 series has 100, 225, 400, 630, 800, 1250 rated currents. 100 rated currents in 100 rated currents are 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A. 25 A case frame rated currents are 100A, 125A, 160A, 180A, 200A, 225A. 225 A. For example, in the DZ20 series of moulded case circuit breakers produced by some production companies in the market, the product models are DZ20-100 and DZ20-225, both of which have a rated current of 100 A. However, the size, shape and breaking capacity of the circuit breakers are different, so you need to know the model number when selecting the type, i.e. the rated current of the circuit breaker within the rated current range of the specific case level. If you don't quite understand this information, please call Tassie Electric customer service directly. The rated current classification is selected according to the priority factor (1.25): firstly, to meet and satisfy the needs of the maximum rated current of the line and electrical components; secondly, for standardisation and thus to obtain the best possible use and processing efficiency of the wire. Therefore, its prescribed rating is: 3 (6), 8, 10, 12.5, 16, 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400A, etc. Due to this provision, when the calculated load of the line is 90A, only 100A can be selected, which to a certain extent affects its protection performance.

The detonator current rectification value is the detonator adjusted to an action control current value. It refers to the number of times the rated operating current In, is the action as well as the current value, such as overcurrent rectification to 1.2, 1.3, 5, 10 times the current, it is written as Ir = 1.2In, 1.3In, 5In, 10In and so on. Now some of our enterprises electronic decoupling device, its overload long delay system rated voltage current is effective for management regulation and control, the current adjusted, in fact, China still needs the rated output current, is the maximum economic current that can be achieved through long-term development.

The rated operating current is the actual operating current of the contacts of the moulded case circuit breaker at a certain operating voltage when the auxiliary contacts (accessories) are installed, with a current of 3A or 6A for control and protection circuits.

Next, we will discuss the arc length of the moulded case circuit breaker, which is only briefly presented to you here for information purposes only.

When a moulded case circuit breaker opens a large short circuit current, when its movable and static contacts separate, an arc is generated and part of the arc or ionised gas is ejected from the arc nozzle at the power end of the circuit breaker. The arc itself is a huge current, which can easily lead to an accident of inter-phase short circuit and earth short circuit between the exposed conductor and the exposed charged body and the ground (the metal casing of the set is earthed). To ensure safety, users should maintain a certain distance according to the data provided in the manufacturer's product samples or operating instructions. If the height and distance of the distribution box or cabinet are not enough, you can choose products with small or zero arc-burning distance. Taisi Electric plastic case circuit breaker can be tested by Taisi Electric professional and technical personnel to detect the distance between the foxes and increase the arc extinguishing mechanism to ensure the safety of electricity.

It is understood that many people often plastic case circuit breaker manufacturer's architecture for the level and flying arc distance of these two main characteristics in the usual ignored, but they are actually they are at the same time an important part of the composition of the plastic case circuit breaker a factor that plays a very important role, so should pay attention to the development up.