May I ask how the master chooses to open?
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Hello, masters: 1. I don’t understand this very well. I would like to ask for advice. For 220V loads, one is 100W, one is 400W, and one is 700W. Each channel needs a circuit breaker. What size circuit breaker should be selected for each of the three? ? 2. It seems that if you choose a large size, it won’t jump? Also, how big does the total space need to be? 3. Are there any specifications for this air opening selection? 4. Should the other party's wiring be directly connected to the main circuit breaker, or do we need to connect 3 terminals before the main circuit breaker? Thank you masters for your answers, thank you! !
Is it appropriate to put this on the dashboard?
According to the current, choose the same circuit breaker as the rated current.
We also need to increase the current level of the circuit breaker.
It's OK to choose circuit breakers with rated currents of 1A, 3A, and 4A respectively. It's better to have terminal blocks. It's okay if you don't connect them directly. Note that the rated current of the total circuit breaker should be greater than the maximum rated current of the next stage.
Thank you teacher zdf. What does it mean that the rated current of the total circuit breaker is greater than the maximum rated current of the next stage? What next level?
You are not an electrical major in a design institute, so there is no need to worry about these small loads. Nowadays, the quality of air conditioners varies widely. Some models with the same specifications and specifications have 16A not tripping, while some 40A have tripped. Basically choose according to the load category, such as C and D type, and then choose according to the capacity. Choose the larger one overall and the smaller one if divided. The capacity should be 1.5 to 3 times the actual capacity. In some cases, 10 times may not be enough, such as ballast equipment with coils.
For example, if the main incoming circuit breaker of an instrument panel is selected to be 10A, and the circuit breaker of an actuator attached below it is also 10A, then if there is a problem, it is very likely that the 10A circuit breaker of the main circuit breaker will trip first. Although there is nothing wrong with this design. However, it is better to make the lower level jump to the upper level first and then to the upper level, so that the design is more reasonable. It’s a suggestion type of opinion.
1A, 2A, and 5A circuit breakers are available, and the total circuit breaker is optional with 10A circuit breaker with leakage protection. Generally, the terminal blocks need to be connected, and it doesn’t matter if you don’t.