### 2.3.7 Surge Protection

l Ensure that the neutral point of the AC power socket is in good contact with the ground.

l Install a power arrester in front of the power input end to enhance surge protection for the power supply.

l When an AC power cord is introduced from outdoors and directly connected to the power port of the switch, the AC power port must be connected to an external power strip with surge protection to protect the switch against lightning strikes. Connect the mains AC power cord to the power strip with surge protection, and then connect the equipment to the power strip with surge protection. This prevents the current of high-voltage lightning from directly passing through the switch along the mains cable.

Note

l Power strips with surge protection are customer-supplied.

l For details on how to use a power strip with surge protection, see the related user guide.