Rated current of fuse melt.how to test a car fuse with a multimeter_Industry Trends_News & Events_XC Electronics(Shenzhen)Corp.,LTD

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07 2023-07

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　　1. When protecting smooth loads without starting process, such as lighting circuits, resistors, electric furnaces, etc., the rated current of the melt is slightly greater than or equal to the rated current in the load circuit.

　　2. The melt current of a single motor that operates for a long time can be selected based on the maximum starting current or according to the following formula:

　　IRN ≥ (1.5-2.5) IN

　　In the formula, IRN - rated current of the melt; IN - Rated current of the motor. If the motor starts frequently, the coefficient in the formula can be appropriately increased to 3-3.5, depending on the actual situation.

　　3. Protecting multiple motors that have been operating for a long time (power supply main)

　　IRN ≥ (1.5-2.5) IN max+ Σ IN

　　IN max - The rated current of a single motor with the maximum capacity. Σ In other words, the sum of the rated current of the motor.

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