Electrical Safety Precautions

Reclosing can be categorized into single-phase reclosing, three-phase reclosing, and comprehensive reclosing.Single-phase reclosing: After a single-phase fault occurs on the line, single-phase reclosing is performed. If reclosing occurs onto a permanent fault, all three phases are tripped and no further reclosing attempts are made. For interphase faults, all three phases are tripped without reclosing.Three-phase reclosing: Regardless of fault type, all three phases are tripped followed by three-

A "2-in 4-out 10 kVsolid-insulated ring main unit" refers to a specific type of ring main unit (RMU). The term "2-in 4-out" indicates that this RMU has two incoming feeders and four outgoing feeders.10 kVsolid-insulated ring main unit are equipment used in medium-voltage power distribution systems, primarily installed in substations, distribution stations, and transformer stations to distribute high-voltage power to low-voltage distribution networks. They generally consist of high-voltage incomi

Low-voltage distribution lines refer to the circuits that, through a distribution transformer, step down the high voltage of 10 kV to the 380/220 V level—i.e., the low-voltage lines running from the substation to the end-use equipment.Low-voltage distribution lines should be considered during the design phase of substation wiring configurations. In factories, for workshops with relatively high power demand, dedicated workshop substations are often installed, where transformers supply power direc

1. What Is a Three-Phase Power Surge Protective Device (SPD)?A three-phase power surge protective device (SPD), also known as a three-phase lightning arrester, is specifically designed for three-phase AC power systems. Its primary function is to limit transient overvoltages caused by lightning strikes or switching operations in the power grid, thereby protecting downstream electrical equipment from damage. The SPD operates based on energy absorption and dissipation: when an overvoltage event occ