Ruijie RG-NBS5200 Series Switches Hardware Installation and Reference Guide
Preparation before Installation
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the leakage current of the system totals 56 mA. A leakage protector with 30 mA rated action current supports less
than five power supplies (that is, Action current of the leakage protector/2/Maximum leakage current of each
power supply = 30/2/3.5 = 4.28). In other words, the leakage protector with 30 mA rated action current supports no
more than four power supplies. In this case, the sixteen power supplies in the system require at least four leakage
protectors with 30 mA rated action current and each leakage protector supports four 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 currents of all the power supplies. The rated leakage non-action current
of a leakage protector shall be 50% of the leakage action current. Take a leakage protector with 30 mA rated
leakage action current as an example. The rated leakage non-action current shall be 15 mA. When the leakage
current is below 15 mA, the protector shall 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 the leakage current value of each power supply model, see the power supply model parameter table in
Chapter 1.
2.1.4 ESD
To prevent Electronic Static Discharge (ESD), pay attention to the following:
Proper grounding of grounding screws on the back panel of the device. Use of a three-wire single-phase socket
with protective earth wire (PE) as the AC power socket.
Indoor dust prevention
Proper humidity conditions
2.1.5 Laser
The RG-NBS5200 series switches support varying models of optical modules sold on the market which are Class I laser
products. Improper use of optical modules may cause damage. Therefore, pay attention to the following when you use
them:
When a fiber transceiver works, ensure that the port has been connected with 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 and stare into the transceiver interface or you
may hurt your eyes.
Do not stare into any optical port under any circumstances, as this may cause permanent damage to your eyes.
2.1.6 Battery
The RG-NBS5200 series switches support the button cell battery. Improper use of battery may cause damage.
Therefore, pay attention to the following when you use them:
Risk of fire or explosion or defeat the safeguard of equipment if the battery is replaced by an incorrect type.
Replace only with the same or equivalent type.
Disposal of a battery into fire or a hot oven, or mechanically crushing or cutting of a battery, that can result in an
explosion.
