Is A Backup Protector The Same As A Surge Protector?
In lightning protection equipment, many people know surge backup protectors, but they don't know much about them. They always can't figure out the difference between surge protectors and backup protectors. So are backup protectors and surge protective device the same? Let's analyze from different angles today.
1. First, we need to know what kind of equipment they are
Surge protectors are referred to as SPDs in English, also known as power lightning arresters, surge protectors, etc. Electrical appliances used to limit transient overvoltages and discharge surge currents, it contains at least one nonlinear element.
The function of a surge protector is to limit transient overvoltages and discharge surge currents. It is generally connected in parallel to the main circuit. It usually has a high impedance property. When TOV appears in the circuit, it will conduct and discharge surge currents. At this time, it is in the conduction mode and can be regarded as a directly grounded wire, which can discharge the surge current in the main circuit to the ground wire. Surge protectors can be regarded as the "guardian god" of products in electrical systems or communication systems, protecting the safety of circuits and equipment during lightning strikes.
Surge backup protector (SCB) is an external disconnection device for surge protectors in low-voltage power supply systems. It can withstand the expected surge current at the installation location of the protected surge protection device, and can disconnect the power frequency overcurrent caused by the failure of the surge protector, and has the characteristics of power frequency small current action.
The function of the surge backup protector is to quickly disconnect the circuit when the SPD surge protector has a transient overvoltage short circuit, avoiding accidents caused by the melting of the SPD surge protector; when the backup protector has a lightning current passing through, this external disconnector will not be accidentally disconnected due to the lightning current, so that the lightning protection of electrical equipment is always in an effective state.
2. Are backup protectors and surge protectors the same?
1. Surge protectors are devices used to protect electrical and electronic equipment from damage by lightning electromagnetic pulses. They are generally connected in parallel to the main circuit. They can be said to be the "guardian" of many modern high-tech products, protecting the safety of circuits and equipment during lightning strikes.
2. The surge backup protector cannot be used alone. It must be connected in series with the surge protector and connected in front of the surge protector. It will not affect the normal working ability of the surge protector at ordinary times, but it will be quickly disconnected when there is a power frequency short-circuit current in the line. That is, the power frequency current that can cause the surge protector to catch fire is disconnected in time.
3. The surge backup protector and the surge protector are a pair of working partners, and neither is indispensable. With the backup protector, the surge protector works more handy. When the lightning current strikes, the SPD discharges smoothly; when the short-circuit current comes, the backup protector quickly cuts off the lightning protection branch, and the SPD does not catch fire.
I believe that after seeing this, everyone may have the answer in their hearts. The backup protector and the surge protector are the same, but the two cooperate with each other to protect the circuit.
