Ruijie 5/8-Port Plastic Series Switches Hardware Installation and Reference Guide
current of the system totals 30mA. A leakage protector with 30mA rated action current supports less than ten power
supplies (that is, 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 30mA 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 30mA
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 shall be 50%
of the leakage action current. Take a leakage protector with 30mA rated leakage action current as an example. The
rated leakage non-action current shall be 15mA. When the leakage current is below 15mA, 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 30mA (human body safety current is 30mA). When twice of the total leakage current of the system is
greater than 30mA, 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 Static Discharge Damage Prevention
To prevent damage from static electricity, pay attention to the following:
Indoor dust prevention.
Proper humidity conditions.
2.2 Installation Site Requirements
To ensure the normal working and a prolonged durable life of the equipment, the installation site must meet the following
requirements.
2.2.1 Ventilation
Maintain a minimum clearance of 100 mm (3.94 in.) around the device. After various cables have been connected, they
should be arranged into bundles or placed on the cabling rack to avoid blocking the air inlets. It is recommended to clean
the switch at regular intervals (like once every 3 months). Especially, avoid dust from blocking the screen mesh on the
back of the cabinet.
2.2.2 Temperature and Humidity
To ensure the normal operation and prolong the service life of 5/8-port plastic series switch, you should keep proper
temperature and humidity in the equipment room.
If the equipment room has temperature and humidity that do not meet the requirements for a long time, the equipment may
be damaged.
In an environment with high relative humidity, the insulating material may have bad insulation or even leak electricity.
Sometimes the materials may suffer from mechanical performance change and metallic parts may get rusted.
