Many years ago, the United States began testing a method that works in direct current (DC) distribution systemsSolid state power controller SSPCThe product for detecting parallel arc faults includes determining whether the output current conversion rate of the output current sensor from SSPC is higher than the output current conversion rate threshold. And, if the output current conversion rate is higher than the output current conversion rate threshold: set the power switch of SSPC to saturate under current limitation; Determine whether the output voltage of SSPC is below the output voltage threshold;If the output voltage is below the output voltage threshold: enable modulation of the pulse width power switch; Determine whether the output voltage waveform and output current waveform of SSPC are consistent with the capacitive load attached to the SSPC output, and if the output voltage waveform and output current waveform are inconsistent with the capacitive load, issue a parallel arc fault to shut down the power switch.

Solid state power controllers (SSPCs) are used in power distribution systems, such as the aerospace industry, as an alternative to traditional electromechanical circuit breakers. SSPCs can distribute power to various electrical loads and protect them. Compared with traditional circuit breaker and relay systems, SSPC has natural advantages. Compared with electromechanical equipment, SSPC provides relatively fast response time and can eliminate arcing during turn off transients and bouncing during conduction transients. This can greatly avoid contact adhesion and contact mechanism failure caused by contact arcing. Compared with electromechanical equipment, SSPC will not experience severe degradation during repeated fault isolation. The weight and size of SSPC may be relatively small. SSPC promotes advanced circuit protection and BIT diagnosis, allowing for efficient distribution architecture and packaging technology.Parallel arc faults in DC power distribution systems, such as aircraft power distribution systems, are an important safety issue. The causes of circuit arc faults may include wire wear, dust accumulation, extreme temperatures, moisture, and insulation breakdown. The integration of arc fault detection in aircraft electrical systems presents significant challenges, including the lack of grounding circuits, which are typically necessary for ground fault protection, transient load characteristics, and zero tolerance interference tripping.

Especially for the on-board electrical system of DC270V, arc breaking becomes more difficult. Without reliable and safe power distribution equipment, the safety performance of the whole machine will face great challenges and damages. The DC270Vsspc launched by Wekewei can effectively avoid these hazards and improve the safe operation of the on-board power distribution system. If you need it, you can contact Wekewei technical personnel to request cutting-edge technical information and product application information.