Ruijie RG-S7800 Series, Руководство по установке оборудования

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S7800 Series Hardware Installation Guide Chapter 3 Preparation before Installation
15
AC input voltage: 90VAC to 264VAC, 47Hz to 63Hz
Power: >1000W.
Note
The RG-S7800 provides N+1 redundancy of power supply. You are
recommended to use multiple power supplies for the equipment to ensure its
continuous and stable operation by avoiding the impact of unexpected power
failures on the equipment.
3.3
System Grounding
Requirements
A good grounding system is the basis for the stable and reliable operation of the RG-S7800.
It is the key to prevent lightning stroke and resist interference. Please carefully check the
grounding conditions on the installation site according to the grounding requirements, and
perform grounding properly as needed.
3.3.1 Safety Ground
The equipment using AC power supply must be grounded by using the orange/green safety
grounding cable. Otherwise, when the insulating resistance decreases the power supply and
the enclosure in the equipment, electric shock may occur.
3.3.2
Lightning Ground
The lightning protection system of the facility is a separate system that consists of the
lightning rod, down lead conductor and the connector to the grounding system, which usually
shares the power reference ground and orange/green safety cable ground. The lightning
discharge ground is for the facility only, irrelevant to the equipment.
3.3.3 EMC Ground
The ground required for EMC design includes shielding ground, filter ground, noise and
interference suppression, and level reference. All the above constitute the comprehensive
grounding requirements. The grounding resistance should be less than 1
Ω
. The RG-S7800
chassis is installed with one grounding pole for shell protection which is with the warning
label, as shown in Figure 1-3 and Figure 1-6 (9 refers to the system grounding pole).
To ensure that the equipment works well, you must connect cables properly. Before you
connect the cables, please carefully read the following precautions.
3.3.4 EMI Consideration
Various interference sources, from either outside or inside the equipment or application
system, affect the system in the conductive ways such as capacitive coupling, inductive
coupling, and electromagnetic radiation.
There are two types of electromagnetic interferences: radiated interference and conducted
interference, depending on the type of the propagation path.
When the energy, often RF energy, from a component arrives at a sensitive component via
the space, the energy is known as radiated interference. The interference source can be
both a part of the interfered system and a completely electrically isolated unit. Conducted
interference results from the electromagnetic wire or signal cable connection between the