 |
With the increasing demand for DC fuses in industry, rail transit and even electric vehicles, how to correctly select DC fuses for effective protection is a problem that users and manufacturers should seriously deal with. Since the DC current has no current zero crossing point, when breaking the ... Read More
|
| |
The case strength of a fast-acting fuse largely determines its breaking capacity for the maximum fault current. Secondly, the shape of the metal frit inside the fast-acting fuse, the ability of the filler to absorb metal vapor and heat, and the electromotive force of the fuse all affect the breaking ... Read More
|
| |
Thunder is a very common natural phenomenon in life. As we all know, during the lightning discharge process, the instantaneous discharge will generate a strong electromagnetic surge shock wave, which invades the equipment through outdoor transmission lines, connecting lines between equipment and ... Read More
|
| |
The actual fusing time of the fuse can be divided into two stages: pre-arcing time and arcing time. The pre-arcing time is also called the pre-arcing time, which refers to the time interval from the moment when the current value is large enough to fuse the fuse element to the moment when the arc ... Read More
|
| |
Ambient temperature: Ambient temperature refers to the air temperature around the fuse. This temperature should be distinguished from room temperature. Since the fuse is usually operated under closed conditions (inside the casing) or installed near the heating device (such as resistance, transformer... Read More
|
| |
The IEC standard provides for "durability test method", while the UL standard does not. The durability test in IEC standards is called the life test. Its method is to test at normal temperature using DC power supply: a, frontal current until the temperature is stable voltage drop; B. 1.2 times rated ... Read More
|
| |
Fuses and circuit breakers are both critical components of electrical systems designed to interrupt circuits immediately after overcurrent or overload, and there are some key differences in the way they operate. Fuse is a kind of metal sheet, when overload and overcurrent will be blown, so it is ... Read More
|
| |
(1) There are short circuits in the circuit, and the short -circuit current is too large. (2) The load power is too large and the current increases. The ability of the fuse can normal through the current, and the circuit fuse can be burned. (3) Unstable voltage, frequent changes in the power of the ... Read More
|
| |
Generally speaking, the molten melting insurance is used for inductors such as motors, valves and other inductors When the load is a large current load (above 20A), choose a slow melting funeral, such as defrosting; When a long -term pulse load is used, a molten funeral, such as a glass lift motor ... Read More
|
| |
The carrier of the resistance type is generally a continuous load, and the fast melting fuse is usually used, such as each control module, the lighting system, etc. For motor -like perceptual loads, if the melting time exceeds the peak current time of the load, you can choose a fast melting funeral. ... Read More
|
