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| H3C WX5002V2 Access Controller Installation Manual-6PW101-Appendix B Installation of Lightning Arrester for AC Power.pdf | 69.74 KB |
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| 03-Appendix B Installation of Lightning Arrester for AC Power | 69.74 KB |
No lightning arrester (lightning protection grounding strip) is supplied with the access controller.
If an outdoor AC power cable should be directly led to the access controller, to prevent possible damages to the access controller due to lightning strike, please serially connect the lightning arrester for AC power (lightning protection grounding strip) before you plug AC power cable into the access controller. You can use cable clips and screws to fasten the lightning arrester for AC power on the cabinet, workbench or the wall of the equipment room. When you power on the access controller, the AC power flows through the lightning arrester and then into the access controller.
Figure B-1 Diagram of lightning arrester
Note the following points:
1) Make sure that the PE terminal of the arrester is well grounded before using the lightning arrester for power.
2) Upon plugging the AC power cable connector of the access controller into the receptacle of the lightning arrester, if the green LED is on while the red LED does not alarm, it means that the lightning arrester of power is running and the function of lightning protection has taken effect.
3) Pay adequate attention if the red LED is on. You should correctly locate the problem, whether it is caused because the ground cable of the arrester is not well grounded or because the live and zero wires are connected in reverse direction.
4) You may use a multimeter to examine the polarity at the power receptacle of the arrester:
l With the power receptacle facing you, if the multimeter displays that the left wire is the zero wire and the right is the live wire, it means that the PE terminal of the arrester is not well grounded.
l Otherwise, it means that the power receptacle of the arrester is set to the reverse polarity. In this case, open the power receptacle of the arrester and correct the polarity. After that, if the red LED still alarms, it means that the arrester is not well grounded yet.
