Main Parameters Of Surge Protector

Publish Time: 11/21 2024 Author: Site Editor Visit: 0

1. Nominal voltage Un: The rated voltage of the protected system is consistent. In the information technology system, this parameter indicates the type of protector that should be selected. It indicates the effective value of AC or DC voltage.
2. Rated voltage Uc: The maximum effective value of voltage that can be applied to the specified end of the protector for a long time without causing the protector characteristics to change and activating the protection element.
3. Rated discharge current Isn: The maximum peak value of the impulse current that the protector can withstand when the protector is subjected to 10 standard lightning waves with a waveform of 8/20μs.
4. Maximum discharge current Imax: The maximum peak value of the impulse current that the protector can withstand when the protector is subjected to 1 standard lightning wave with a waveform of 8/20μs.
5. Voltage protection level Up: The maximum value of the protector in the following tests: sparkover voltage with a slope of 1KV/μs; residual voltage of the rated discharge current.
6. Response time tA: It mainly reflects the action sensitivity and breakdown time of the special protection element in the protector. The change within a certain period of time depends on the slope of du/dt or di/dt.
7. Data transmission rate Vs: indicates how many bits are transmitted in one second, unit: bps; it is the reference value for correctly selecting lightning arresters in data transmission systems. The data transmission rate of lightning arresters depends on the transmission mode of the system.
8. Insertion loss Ae: the voltage ratio before and after the protector is inserted at a given frequency.
9. Return loss Ar: indicates the proportion of the front wave reflected at the protection device (reflection point), which is a parameter that directly measures whether the protection device is compatible with the system impedance.
10. Maximum longitudinal discharge current: refers to the maximum impact current peak value that the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied to each line to the ground once.
11. Maximum transverse discharge current: refers to the maximum impact current peak value that the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied between lines once.
12. Online impedance: refers to the sum of the loop impedance and inductive reactance flowing through the protector at the nominal voltage Un. Usually called "system impedance".
13. Peak discharge current: divided into two types: rated discharge current Isn and maximum discharge current Imax.
14. Leakage current: refers to the DC current flowing through the protector at a nominal voltage of 75 or 80 Un.