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Appendix II
Thunder Protection Feature
Introduction:
Thunder is such formidable natural force that it can render massive damage to electronic
products of all kinds. In thunderstorm season computer systems without powerful thunder
protection designs are vulnerable to electric surge damage. High-priced building with
thunder protection measures may be a good choice, but usually costly and with corners
uncovered. The best solution for both cybercafés owner and common users would be
Jetway Thunder Series motherboards.
Thunder Protection Technology from Jetway Thunder Series Motherboard
Jetway Thunder series motherboards are integrated with double thunder-protection walls,
one from network port and the other from LAN chip. When it thunders, the first
thunder-protection wall will analyze and recognize thunder surge in network cable and
transfer it to ground wire area. The second thunder-protection wall will protect against any
residual electric current or runaway electrons to ensure safety of network card and other
components of the motherboard.
Laboratory test statistics on IEC61000-4-5 (1.2-50us) standardized thunder electric surge
tests have verified that Jetway Thunder series motherboard can endure up to 9KV electric
surge and protect the system from possible thunder damage.
IEC61000-4-5 (1.2-50us) Standardized Thunder Electric Surge Laboratory Test
Medium rise time: T1=1.2us±30%, T2=50us±30%
Test1:
Current Partial Discharge tests on Jetway Thunder Series Motherboards with double
Thunder-protection Walls.
Test Result:
Each MB can endure up to 9KV voltage of electric surge. Some motherboards
will restart (mostly depends on LAN chip), but no damage occurs to motherboards or
components of the board. System works normally after a restart.
Test2
: Current Partial Discharge tests on Motherboards without Thunder-protection function
Test Result:
LAN chips are damaged when testing voltage reached to 5KV. System fails to
operate normally (in most cases systems can not access to network) after a restart.