Lightning Resistance; Emi - Ruijie Reyee RG-NBS3100-24GT4SFP-V2 Installation Manual

Installation Guide
2.2.6

Lightning Resistance

When the AC power cable is imported outdoors and directly connected to the power port of the RG-NBS3100
series switch, use the lightning line bank to prevent the switch from being hit by lightning shocks. In this case,
connect the mains supply AC cable to the lightning line bank, and connect the switch to the lightning line bank.
This helps prevent the current of high-voltage lightning from passing the switch directly through the mains
supply cable to a certain extent.
Note
The lightning line banks are not provided and should be purchased by customers as required.
2.2.7

EMI

Electro-Magnetic Interference (EMI), from either outside or inside the device or application system, affects the
system in the conductive ways such as capacitive coupling, inductive coupling, and electromagnetic radiation.
There are two types of electromagnetic interference: radiated interference and conducted interference,
depending on the type of the transmission path.
When the energy, often RF energy, from a component arrives at a sensitive component through the space, the
energy is known as radiated interference. The interference source can be either a part of the interfered system
or a completely electrically isolated unit. Conducted interference results from an electromagnetic wire or signal
cable connection between the source and the sensitive component, along which cable the interference
conducts from one unit to another. Conducted interference often affects the power supply of the device, but can
be controlled by a filter. Radiated interference may affect any signal path in the device and is difficult to shield.

For the TN AC power supply system, the single-phase three-core power socket with protective earthing
conductors (PE) should be adopted to effectively filter out interference from the power grid through filtering
circuits.

Do not use the grounding device for an electrical device or anti-lightning grounding device. In addition, the
grounding device of the device must be deployed far away from the grounding device of the electrical device
and anti-lightning grounding device.

Keep the device away from the high-power radio transmitter, radar transmitting station, and high-frequency
large-current device.

Take measures to shield static electricity.

Lay interface cables inside the equipment room. Outdoor cabling is prohibited, avoiding damages to device
signal interfaces caused by over-voltage or over-current of lightning.
10
Preparation before Installation