In organizing the research on the DC270V arc in the international aviation system, the editor found that at the most recent semi annual meeting submitted to SAE, some companies and the Federal Aviation Administration (FAA) did work last summer, such as in countries where high-voltage direct current was used earlier, such asResearch on DC270V Arc in the United StatesWill it be earlier. The editor found that these tests were conducted at the Federal Aviation Administration's technology center in Atlantic City, with a test voltage of 270VDC. Although DC270V can significantly improve the weight of the entire machine, it is also very difficult to handle the DC 270V arc. This research has given rise toArc free distribution SSPC58彩票Development and growth.

This 270V arc test has four objectives:

1. Conduct tests that help groups such as SAE better understand the potential damage caused by higher voltage arc events;

2. Determine the impact of 270VDC direct contact arc on several target types;

3. Determine the 270VDC impact caused by indirect arc damage; as well as

3. Collect 270VDC arc waveform data for the arc damage modeling tool (ADMT) of various user units.

The testing configuration and method used are similar to the commonly reported arc damage techniques, although some modifications have been made to the 270VDC power supply. In a general testing configuration, the power supply runs to the arc fault position through a contactor. Adjustable fault current limiting resistors are placed on the circuit, and fuses are also placed on the circuit to limit the duration of the arc.

In the experiments conducted by the FAA and various research institutions over the past decade, it has been found that the swing test is a good representative test procedure for evaluating direct contact arc damage. In these swing tests, a cut is made on the insulation layer of the wire to expose the wire to the outside. Then connect both ends of the wire to the circuit and to the power supply. In this example, the target is a part of the aircraft structure that is connected to the ground. At the beginning of the test, unplug the wire from the target, apply power, and then release the wire to freely swing into the structure, forming contact and generating an arc.