Phase protection circuit of three-phase four-wire system

Fixed time overcurrent protection principle wiring diagram

220kV arrester template Electrical equipment template drawing

Cable schematic diagram

The benefits of fluorescent lightingWhen the fluorescent lamp normally emits light, only a lower current is allowed at both ends of the lamp, so the voltage added to the lamp is slightly lower than the power supply voltage, but the fluorescent lamp needs a higher voltage breakdown when it starts to work, so the ballast is added to the circuit, which can not only produce a higher voltage when starting, but also stabilize the current when the fluorescent lamp works.