Criteria for Choosing a Circuit Breaker
When choosing, you need to decide in advance for what specific purposes it will be used – to protect the entire electrical network as a whole or for a specific device. You also need to know what tripping speed to prefer, determine the type of electrical network in the room, and select the device accordingly.
Also, when selecting a circuit breaker, attention is paid to the following parameters:
1. Rated current value. An important parameter that determines the total power of all connected devices. It is selected based on the wire thickness – the thicker it is, the more current it can withstand. Household circuit breakers typically have rated current values of 6, 10, 16, 25, 32, 50A.
2. Load power. The appropriate circuit breaker should be selected in accordance with the power consumption.
3. Breaking capacity. By breaking type, there are 4.5 kA, 6 kA, 10 kA. This function is responsible for the maximum amount of electricity that the circuit breaker can disconnect and remain operational.
4. Number of poles. A single-phase 220V network is equipped with single-pole and double-pole circuit breakers. A three-phase 380V network – with three-pole and four-pole ones.
5. Type and class of release. They can be thermal and magnetic, classes B, C, D. Thermal releases are usually installed for overloads, and magnetic ones – to prevent short circuits. Typically, class C devices are used for apartments, and class D for office spaces.
Tripping occurs under the following parameters:
exceeding the rated current by 3-5 times;
exceeding the values up to 10 times;
increasing the values by 20 times.
Do not give preference to new, unknown manufacturers, even if the price of circuit breakers at https://stroysklad.com.ua/automatic-m.html is very attractive. It is best to trust already proven and well-known equipment and be confident in its reliability and durability.
It is important to consider that the reliability and durability of the system depend on the correctness of installation, not to mention the safety of property and your own life. Therefore, during installation, it is important to consult with a specialist.
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