Single phase power supply
A single phase power supply is an AC power circuit that transmits a single AC voltage through two conductors, the phase line and the neutral line. The phase line transmits the current to the load device, and the neutral line guides the current from the load device back to the power supply.
About the characteristics of single-phase power:
- Use a two-wire AC circuit
- The standard frequency is 50Hz or 60Hz
- The connected load is usually less than 100kVA
- It can be divided into two circuits to power household appliances
- The voltage is usually around 230 volts, but different countries have different standards
- Commonly used for lighting, heating and small appliances in residential and small commercial buildings
- The voltage alternates between positive and negative, and there will be a momentary power drop when the voltage reaches zero in each cycle
What is a single phase surge protection device?
Single-phase surge protection device can detect transient voltages on the circuit, divert surge currents through the grounding system, and prevent transient surges from affecting electrical load equipment. Commonly used in single-phase power system applications such as homes and offices.
Most of the surges on the circuit come from the operating overvoltage generated by the switching of the load equipment, and a small part comes from external lightning and power grid failures.
In normal operation of the circuit, the single-phase surge protection device is in a high-resistance state, and the current does not flow through the single-phase SPD.
When a transient voltage appears in the circuit, the single-phase surge protection device will be turned on, and the transient voltage will enter the ground through the surge protection device.
When the voltage returns to normal, the single-phase surge protection device will automatically reset.
If the single-phase SPD cannot automatically reset, it is likely to be broken. Check the single-phase surge protection device and repair or replace it.
We all hope that we will never use a single-phase surge protection device, but it is necessary to have it. At critical moments, the single-phase surge protection device can protect the load equipment on the circuit and avoid property losses for you.