Huawei AP4030DN Hardware Installation And Maintenance Manual page 75

Huawei AP4030DN
Hardware Installation and Maintenance Guide
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Requirements for ESD Prevention
The absolute value of electrostatic voltage is less than 1000 V.
Take the following measures to meet the requirements:
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Electromagnetism Requirements for the Equipment Room
All interference sources, inside or outside the equipment room, can cause equipment problems
with capacitive coupling, inductive coupling, electromagnetic wave radiation, and common
impedance (including grounding system) coupling. Prevent the interference using these
approaches:
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Requirements for Lightning Proof Grounding
Table 5-13
Table 5-13 Requirements for lightning proof grounding
Item
Capital
construction
Power cables
leading in the
equipment room
need to be
Issue 02 (2015-05-18)
Place batteries in different rooms.
A professional service should monitor the corrosive gas conditions regularly.
Train operators about ESD prevention.
Keep the correct humidity level in the equipment room to reduce the impact of static
electricity.
Lay out an ESD floor in equipment rooms.
Wear ESD shoes and clothing before entering equipment room.
Use ESD tools, such as wrist straps, tweezers, and pullers.
Ground all conductive materials in the room, including computer terminals. Use ESD
worktables.
Keep non-ESD materials (such as common bags, foams, and rubbers) at least 30 cm
(11.81 in.) away from boards and ESD-sensitive components.
Take effective measures against electrical interference from the power supply system.
Do not use the working ground of the equipment as the same ground for surge protection.
Separate them as far as possible.
Keep the equipment far away from strong power radio transmitters, radar units, and
high-frequency and high-current equipment.
Use electromagnetic shielding if necessary.
shows the requirements for lightning proof grounding.
Requirements
Use the reinforced concrete structure for the construction of the
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equipment room.
Install the lightning proof device like a lighting rod in the room.
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The lightning proof ground shares the same grounding body with
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the protection ground of the room.
After the low-voltage power cables are led into the room, install the
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surge arrester for the power cables in the AC voltage stabilizer and
the AC power distribution panel (box). Ground the arrester nearby
and correctly.
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