Under laboratory conditions, one of the manufacturing industries, rated current: fuse rated current, code is also known as the rated current in the fuse to determine. The nominal current is typically 100mA, 200mA, 315mA, 400MA, 500mA, 630mA, 800mA, 1A, 1.6A, 2A, 2.5A, 3.15A, 4A, 5A, 6.3A but the company generally The customer's needs and practical use provide all kinds of fuses with current rated voltage rating.Two: Fuse rated working voltage, code-named UN, general fuse rated voltage 32V standard, 60V, 125V, 250V, 300V, 500V, 600V. Fuses can not exceed their rated voltage use, but generally do not agree to use the circuit voltage ratio of the fuseRated voltage circuit.In three, the voltage drop is larger: the fuse rated current of the fuse, when it reaches the thermal equilibrium temperature is stable, the voltage is measured. Ud.Because voltage drop circuit at both ends of the fuse, there will be some impact, so in Europe there are two specific requirements of pressure drop. In four, the fuse resistor: Generally divided into cold and heat, cold, temperature 25 ℃, less than 10% of the rated current of the circuitStream circuit to measure the resistance value and fusion. The thermistor is measured at full rated current and the current-voltage conversion is calculated as formulaFor r = UD /. Heat resistance, cold resistance than usual, our fuse resistance is cold, resistant only as reference.Five, overload current through the current overload current higher circuit definition. If you do not cut off the overload current, it is possible, electricIn other equipment damage. The short-circuit current in the circuit is a complete or partial short-circuit generated current, and the short-circuit current is usually quite large, than the on-load current big.Six, the characteristics of the fuse: time / current characteristics (also called Ann- second characteristic) . There are usually two kinds of expressions, IT diagrams and test reports. The IT diagram is composed of loadFlow coordinates X and Y coordinates formed by the fuse of the time coordinate system under different current loads with the average time fuse fusion points points. Curve. Each type of fuse specifications, with the corresponding curve can represent the characteristics of the fuse. You can choose the curve fuse.Test. The test report is a standard test requirement based on the test's test data recorded. Our IT drawings and test reports are based on onIn experimental conditions, the measurement data obtained under actual conditions, the curve or test report will be different, therefore, I provide DivisionThe test report and IT reference mapping, fuse breaking capacity : Also known as rated capacity, rated voltage, that is, can safely break the maximum current (effective AC current value). Is an important indicator of safety. Breaking the Ir.Eight code, the ability to melt a thermal energy value: The amount of energy required for a fuse, code-named for it, read A2Sec. It is a fuse that blows off the sum of the square of the current in 8 ms or less and the product's fuse-off time, limiting the heat generated by the 8ms fusion for a full time to confine, too late to Dissipate the heat. It is a constant for each part of each fuse, it is a parameter of the fuse, the design of the fuse decisions.Nine, the temperature rise itself is by a specified current value of the fuse (specified UL 100% at 115 %, Sundial specified
Temperature conditions to achieve temperature and temperature difference before.Current fuse classification stableTiming):
According to the size can be divided into: size, 3.6X10,3X10 5X20,6X30,6X32,6X25,10 * 38,2.4X7,2.5X6,3X8,2.5X9,8.5X8,8.5X8X4,3.5X10,3.5X9According Currently divided into : 32mA, 63mA, 100mA, 150mA, 200mA, 250mA, 300mA, 400MA, 500mA, 600MA, 800mA Current 1A, 1.25A, 1.6A, 2A, 2.5A, 3A, 3.5A, 4A, 5A, 6A, 7A, 8A, 9A, 10A, 12A, 15A, 20A, 25A, 30APress
Material can be divided into:
Glass fuse
Ceramic fuse