Ruijie RG-NBS3100 Series Switches Hardware Installation and Reference Guide Preparation before Installation
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action current of the leakage protector/2/maximum leakage current of each power supply = 30/2/1.5 = 10). In other
words, the leakage protector with 30 mA rated action current supports no more than ten power supplies. In this
case, the twenty power supplies in the system require at least two leakage protectors with 30 mA rated action
current and each leakage protector supports ten power supplies. If power supplies in a system differ in models, the
rated leakage action current of each leakage protector divided by two is greater than the sum of maximum leakage
current of all the power supplies. The rated leakage non-action current of a leakage protector must be 50% of the
leakage action current. The leakage protector with 30 mA rated leakage action current is used as an example. The
rated leakage non-action current must be 15 mA. When the leakage current falls below 15 mA, the protector
should not act. Otherwise, misoperation may easily occur due to high sensitivity and thus the leakage protector
trips, devices are powered off, and services are interrupted.
To guarantee personal safety, the rated leakage action current of each leakage protector in the system must be
equal to or less than 30 mA (human body safety current is 30 mA). When twice of the total leakage current of the
system is greater than 30 mA, the system must be equipped with two or more leakage protectors.
For details of the leakage current value of each power supply model, see Chapter 1 Product Overview.
2.1.4 ESD
To prevent Electronic Static Discharge (ESD), pay attention to the following points:
Proper grounding of grounding screws on the back panel of the device, and three-wire single-phase socket with
protective earth wire (PE) used as the AC power socket.
Indoor dust prevention
Proper humidity conditions
2.1.5 Laser
The RG-NBS3100 series switches support varying models of optical modules (Class I laser products) sold on the
market. Improper use of optical modules may cause damage. Therefore, pay attention to the following points:
When a fiber transceiver works, ensure that the port has been connected to an optical fiber or is covered with a
dust cap, to keep out dust and avoid burning your eyes.
When the optical module is working, do not pull out the fiber cable or look directly into the transceiver. The
transceiver emits laser light that may hurt your eyes.
Do not stare into any optical port under any circumstances because this may cause permanent damage to your
eyes.
2.2 Installation Site Requirements
The installation site must meet the following requirement to ensure normal working and a prolonged durable life of the
switch.
2.2.1 Ventilation
For the RG-NBS3100 series, a sufficient space (at least 10 cm distance from both sides and the back plane of the
cabinet) should be reserved at the ventilation openings to ensure normal ventilation. After various cables have been
connected, they should be arranged into bundles or placed on the cabling rack to avoid airflow blocking. It is
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