Surge Protector, Backup Protector

Surge protector, backup protector - lightning protection combination. Surge and backup protector are: The function of surge protective device is that when a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protection device conducts and shunts in a very short time, thereby preventing the surge from damaging other equipment in the circuit. The main function of the backup protector is to actively maintain the safety of the line. It is inevitable that the maintenance device will fail to operate, other links in the maintenance circuit will be damaged, and the circuit breaker will fail to operate. At this time, the backup protector will quickly start to remove the fault and eliminate the hidden danger, so as to achieve the function of fast disconnection of power frequency small current and non-tripping of large current lightning impact.

Surge protector, backup protector - lightning protection combination. How surge protector and backup protector cooperate:

1. When the power supply has an abnormal transient overvoltage and the SPD is turned on and a short circuit occurs, it will cause the power supply to trip and power off at the least, and it will cause a serious fire accident at the worst. At this time, the backup protector will ensure that the SPD can quickly disconnect the circuit when a short circuit occurs.

2. When the SPD deteriorates (subjected to lightning current shock or transient overvoltage shock), causing the starting voltage to drop below the power supply voltage, the power frequency leakage current will increase rapidly. When this current is only a few amperes, the SPD thermal tripping mechanism can disconnect the circuit. When the current is greater than 10A, the SPD heats up and burns faster than the heat transfer speed, which means that the SPD has caught fire before the heat transfer reaches the tripping temperature. At this time, the backup protector will disconnect the circuit before the SPD catches fire to prevent the occurrence of fire.

3. When the SPD has a lightning current passing through it, the backup protector ensures that there will be no false tripping, so that the lightning protection of electrical equipment is always in an effective state.