 |
Determine the category of insurance based on the characteristics of the load. Generally speaking, inductors such as motors, valves, etc. use slow melting insurance, and the resistance of the resistor uses fast melting insurance. You can also choose according to the specific load current characterist... Read More
|
| |
In the circuit, the voltage resistance resistance is used in line with the fuse. When the circuit is affected by lightning or overvoltage, it plays a protective role and is protected by transient voltage in the circuit. When the circuit is cross -voltage, the voltage -sensitive resistance will be ... Read More
|
| |
Compared with the circuit breaker, fuse is a very loss -consuming device. The fuse is a static device. Compared with the circuit breaker, it does not need to be maintained. There are activity components inside the circuit breaker, and it needs to be maintained and tested to run normally. The main ... Read More
|
| |
Slow-acting fuse is also called time delay fuse. Its delay characteristic is that the circuit is in good condition when non-fault pulse current occurs and can provide protection against long-term overload. The current of some circuits at the moment of switching is more than several times of the ... Read More
|
| |
Generally, the fuse consists of three parts: melt part, electrode part and bracket part. The first is the melt part, which is the core of the fuse and plays the role of cutting off the current when it is fused. The melt of the same type and specification of fuse should have the same material, the ... Read More
|
| |
The strength of the quick fuse housing largely determines the breaking capacity of the maximum fault current. Secondly, the shape of the metal fuse inside the fast-acting fuse, the ability and heat of the filler to absorb metal vapor, and the electric power of the fuse link all affect the breaking ... Read More
|
| |
Power consumption of fast fuse W= Δ UIw； Δ U=f (Iw), where: Iw --- working current; Δ U -- voltage drop of fast fuse. The power consumption of the fast fuse has a great relationship with the cold resistance. Selecting a fast fuse with a small cold resistance is beneficial to reducing the temperature ... Read More
|
| |
Generally speaking, the cold resistance of the fuse is basically a fixed value, and the voltage drop (thermal resistance) will change as the temperature rises and falls. Therefore, in the application, the voltage drop at the rated current is important. The resistance of the fuse with a lower rated ... Read More
|
| |
Instant trends or pulse currents are used to describe any startups in the circuit. Inrush, waveforms caused by trend or transient current. For certain applications, pulse current is normal. Therefore, it is important to be appropriate size to allow these pulses to pass through without opening or ... Read More
|
| |
We all know that the action principle of the fuse is: when the fuse bears the load current in the circuit, the heat energy converted from the electric energy will make the temperature of the melt gradually rise from the ambient temperature, and the fuse will also dissipate heat through the ... Read More
|
