Type A air switch: 2 times the rated current, seldom used, generally used for semiconductor protection (generally use fuses);

Type B air switch: 2-3 times the rated current, generally used for secondary circuit protection of the transformer;

Type C air switch: 5-10 times the rated current, the characteristics of the circuit breaker is most commonly used, generally used for building Lighting electricity, etc.

Type D air switch: 10-20 times the rated current, generally used for power distribution.

The so-called how many times the current, is the resistance to impact current, give a certain time switch does not trip, the characteristics of how to avoid the impact current.

Household DZ series of air switches (small circuit breaker with leakage protection), common specifications are: C16, C25, C32, C40, C60, C80, C100, C120 and other specifications, where C stands for the debounce current, that is, the starting current.

For example, C20 indicates that the starting current is 20A, generally installing a 3500W water heater to choose C20 air switch, installing a 6500W water heater to use C32 air switch. Air switches are used to protect electrical wiring as well as to prevent fires, so they should be selected according to the size of the wires rather than the power of the electrical.

If the air switch selection is too large it will not play a role in protecting the wires, and when the wires are overloaded the circuit breaker still won't trip, which will bring a hidden danger to the family safety.

Expanded Information:

Air switches are used to protect wires under normal use. p>Working conditions under normal use of the air switch

Surrounding air temperature: upper limit of the surrounding air temperature +40℃; lower limit of the surrounding air temperature -5℃; the average value of the surrounding air temperature for 24h does not exceed +35℃.

Altitude: the altitude of the installation site does not exceed 2000m.

Atmospheric conditions: the relative humidity of the atmosphere does not exceed 50% when the ambient air temperature is +40 ℃; there can be a higher relative humidity in the bottom temperature; the average monthly maximum relative humidity of the wettest month is 90%, while the average monthly minimum temperature of the month is +25 ℃, taking into account that due to the change of temperature occurs in the product The average monthly minimum temperature of the month is +25℃, taking into account the condensation on the product surface due to temperature change.

Dirt level: dirt pollution level 3.

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