There is no installation of lightning protection device UPS, can be said that there is no lightning protection function, only the city power grid over-voltage or very small stray current play a role in power purification and protection. When the lightning coming, it is first badly damaged; built-in lightning protection device UPS, can not improve its own, and to protect other equipment from lightning damage; from the overhead power line and signal line intrusion Leak over voltage and induced lightning over voltage, is the main cause of damage to the intelligent UPS. Therefore, to strengthen the UPS power supply lightning protection measures is necessary, but also has important practical significance.
Before saying that UPS power lightning, we have to look at the UPS work environment:
1, whether the electricity terminal has lightning protection measures;
2, whether the UPS itself or near the ground;
If the mains households have installed T1-level surge protector, UPS front-end installation of T2-class surge protector, it is recommended that In not less than 20KA, Up is not greater than 1.8kV, UPS output T2 level, 10KA, Up not more than 1.25kV;
If the electricity is not installed T1-level surge protector, UPS front-end installation of T1-level surge protector, Iimp recommended not less than 12.5KA, Up is not greater than 2.0kV, UPS output installed T2 level, Less than 10KA, Up is not more than 1.25kV;
There should be a grounding point near the UPS and ground repeatedly with the incoming power ground. The grounding resistance should not be greater than 1 ohm.
