UL rated for current fuse

ULRatings: UL rated for current fuse

UL rated for current fuse

Current fuse on the parameters of terms

1) UL rated current:

 Also known as the fuse of the nominal current work, the code is In, the fuse is rated current from the manufacturing sector in the laboratory under the conditions set by. Rated current usually have 100 mA, 200mA, 315mA, 400mA, 500mA, 630mA, 800mA, 1A, 1.6A, 2A, 2.5A, 3.15A, 4A, 5A, 6.3A, but the companies to meet the needs of customers and the actual To provide the use of all kinds of fuses rated current value.

2)  UL rated voltage:

 Fuses the nominal voltage, code-named Un, the general standard voltage fuses rated at 32 V, 60V, 125V, 250V, 300V, 500V, 600V. Can not fuse their rated voltage of the voltage, but generally not agree to use the circuit voltage greater than the rated voltage fuse circuit.

 3)  the voltage drop:

 In the fuse-rated current, when the fuse reached thermal equilibrium that is stabilized when the temperature measured by its ends of the voltage, the code is Ud. Voltage drop due to fuse the two ends of the circuit will have a certain impact, the EU regulation on the voltage drop, there are explicit provisions.

4)  UL rated for fuses Resistance:

 Usually divided into cold-resistance and heat-resistance, cold-resistance is 25 ¡æ fuse under the conditions of the current rating by less than 10 percent of the current test measured by the resistance value. Heat-resistance, is in full rated current value is measured by the current test the voltage drop transformed, and the heat is calculated as R = Ud / In. Usually heat resistance than the resistance to cold, I provided by the Secretary of fuse resistance value is the value of cold resistance, and only as a reference.

5)  the current overload:

 The current is containing circuit in mid-stream have been higher than the current normal working hours. If not promptly cut off the current overload, there may be other circuit equipment damage. It refers to short-circuit current circuit in part or in whole, and short-circuit the current, short-circuit current is usually great, and compared to the current overload.

 6)  fuse characteristics:

 Namely the time / current characteristics (also known as the - of seconds). There are usually two ways to express that IT plans and test reports. IT plans for a load current coordinates x, y coordinates for the time fuse of a coordinate system, the fuse different from the current average load time coordinates links to connect the curve. Each model has a standard fuse corresponding curve can represent the characteristics of its links. This curve can fuse in the selection of the reference. Test reports in accordance with the standard requirements of the project's test test test data records. Our IT plans and test reports are based on experiments under the conditions of the measured data obtained in actual use under the conditions of his curve or test reports are different, so I Division of test reports and IT plans Only as a reference.

 7)  breaking capacity:

 Also known as short-circuit rated capacity, that is, rated voltage, safety fuses to breaking the maximum current value (for AC RMS). It is important to safety fuse indicators. Breaking capacity of the code is Ir.

8)  the melting heat value:

 That is, fuse melting of the energy required, the code is I t, read A2Sec. It is the fuse in the 8 ms or less time off when their corresponding links with the square of the current time of the product, the restricted hours in 8 ms within the fuse is used to heat all the links and there was no time to heat. For each of its different parts, the fuse is a constant, it is a fuse their own parameters, from the design determined by the fuse.

9) the temperature rise:

 Temperature is the fuse under the current value-(UL provided for 100% In, as provided for in the regulations, 115% In) under the conditions of stability so that when the temperature reached with the temperature -

UL rated for current fuse end