"This test effectively considered the comprehensive performance of the manufacturer's line selection device. After the small current single-phase ground fault line selection device was put into operation in the distribution network, under the 10 kV line ground fault condition,
The selection of the fault line name and phase sequence will be completed shortly, which will greatly shorten the power failure time and range, and will also end the way of manually finding the fault for many years. Zhang Wenxin, the person in charge of the field work, said.
According to the site understanding, the test simulates the real ground fault via the 10 kV output line with different resistance transition resistances, and connects the fault signal to 16 ground selection devices from 13 manufacturers at the same time.
Verify the line selection and phase selection capabilities of each device. Six types of tests, including metal grounding, 200 to 2000 ohm transition resistance grounding, and arc grounding, were conducted on site, covering the actual operation of the line.
Various common single-phase ground fault types in the process.