英文翻译以下内容

Abstract
Most distribution network for urban and rural areas in China is of low current grounding type, or a system in which the neutral point is not grounded or indirectly grounded via arc suppression coil. The most advantage of this type of system is the stability of its symmetric system voltage. When one-phase grounding failure occurs, the system voltage symmetry will not be affected, hence the system can go on to operate normally for one to two hours. However, such indirect grounding network may cause over-voltage of the network due to intermittent arc generated at the grounding point, resulting an undesired second grounding point at poorly insulated area of the non-failure phase. In this case, the operator has to make proper judgment as to which line fails in limited time and then separate the fault line from the system to avoid worsening of the fault. Therefore, the line selection devices for troubleshooting have found increasing application. This study describes the char