An Article To Make You Understand AFDD

1. What is an Arc Fault Protected Circuit Breaker (AFDD)?

Due to poor contact or insulation damage, the “bad arc” with high energy and high temperature is produced in the electrical circuit, which is not easy to be found but easy to cause equipment damage and even fire.
The scenario prone to faulty arcs
Fault arc, commonly known as electric spark, the center temperature is very high, metal spatter occurs, easy to cause fire. When parallel arc occurs, the live wire and the neutral wire are not in direct contact, only because the insulation skin aging loses insulation characteristics or insulation skin damage, but the distance between the live wire and the neutral line is very close, and the current breaks down the air between the live wire and the neutral line, and sparks are discharged between the live wire and the neutral line.

2. Typical characteristics of low-voltage fault arc:

1. The current waveform contains abundant high-frequency noise
2. There is voltage drop on the fault arc
3. the current rise speed is usually greater than the normal state
4. Every half cycle there is an area where the current is close to zero, which is called the “current zero area”.
5. The voltage waveform is close to a rectangle, and the change rate in the current zero zone is larger than that at other times, and the maximum is when the current is over zero
6. fault arc is often sporadic, intermittent
7. The current waveform has strong randomness
The prevention and control of electrical fire, which is the first fire hazard, is becoming more and more important. Arc Fault circuit breaker (AFDD), an arc protection switchgear that prevents electrical fires in the first place, is required. AFDD — arc fault circuit breaker, also known as arc fault detection device, is a new type of protective appliances. It can detect the arc fault in the electrical circuit, and cut off the circuit before the electrical fire, and effectively prevent the electrical fire caused by the arc fault.

3. What are the application areas of AFDD arc fault circuit breaker?

Arc fault circuit breaker operation mechanism, circuit breaker system, blurted out institutions, inspection function keys, terminal blocks, shell frame, such as general structure, its characteristic structure includes electrical isolated test circuit, the electric solitary electronic components to identify common fault circuit (including microprocessor), system configuration and maintenance based on PCB ant colony algorithm, Carry on the intelligent electric solitary test, the common fault electric solitary discrimination.
A variety of main uses without blind spot more safety factor
AFDD arc fault circuit breaker is widely used in places with dense personnel and inflammable raw materials, such as residential buildings, libraries, hotel rooms, schools and other cultural and public buildings. Coupled with its lightweight and delicate body, the total width is only 36mm, which greatly saves the location of the distribution box, and is compatible with many installation geographical environments. It becomes the best choice for the usual prevention of electrical fire monitoring.