Selection Of Grounding Wire Diameter For Surge Protector
surge protective device Grounding Wire Diameter Selection
Data cables: Required to be greater than 2.5 mm²; when the length exceeds 0.5 meter, greater than 4 mm².
Power cables: When the phase cable cross-sectional area S ≤ 16 mm², use S for the ground cable; when the phase cable cross-sectional area is 16 mm² ≤ S ≤ 35 mm², use 16 mm² for the ground cable; when the phase cable cross-sectional area S ≥ 35 mm², use S/2 for the ground cable; GB 50054, Section 2.2.9
surge protector Main Parameters
1. Nominal voltage Un: This parameter corresponds to the rated voltage of the protected system. In information technology systems, this parameter indicates the type of surge protection device to be selected. It specifies the effective value of the AC or DC voltage.
2. Rated voltage Uc: The maximum effective voltage that can be applied to the specified terminals of the protector for a long period of time without causing a change in the protector's characteristics or activating the protective element.
3. Rated discharge current Isn: The maximum impulse current peak value that the protector can withstand when a standard lightning wave with a waveform of 8/20μs is applied to the protector 10 times.
