Huawei DBU20B-N12A3, Руководство пользователя

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DPU40D-N06A3, DBU20B-N12A3, and
DBU50B-N12A1 Distributed Power System
User Manual
1 Safety Precautions
Issue 04 (2020-02-29) Copyright © Huawei Technologies Co., Ltd. 5
Symbol Description
information. For details, see the description of slot information,
restrictions on boards, and usage conditions in the instruction.
1.2 Personnel Requirements

Personnel who plan to install or maintain Huawei equipment must receive thorough
training, understand all necessary safety precautions, and be able to correctly perform all
operations.

Only qualified professionals or trained personnel are allowed to install, operate, and
maintain the equipment.

Only qualified professionals are allowed to remove safety facilities and inspect the
equipment.

Personnel who will operate the equipment, including operators, trained personnel, and
professionals, should possess the local national required qualifications in special
operations such as high-voltage operations, working at heights, and operations of special
equipment.
 Professionals: personnel who are trained or experienced in equipment operations and are clear of the
sources and degree of various potential hazards in equipment installation, operation, and
maintenance
 Trained personnel: personnel who are technically trained, have required experience, are aware of
possible hazards on themselves in certain operations, and are able to take protective measures to
minimize the hazards on themselves and other people
 Operators: operation personnel who may come in contact with the equipment, except trained
personnel and professionals
1.3 Electrical Safety
Grounding

The protective ground of the equipment should be reliably connected to the ground
screw on the metal enclosure (grounding resistance ≤ 0.1 ohm).

For the equipment that needs to be grounded, install the ground cable first when
installing the equipment and remove the ground cable last when removing the
equipment.

Do not damage the ground conductor.

Do not operate the equipment in the absence of a properly installed ground conductor.

For the equipment that uses a three-pin socket, ensure that the ground terminal in the
socket is connected to the protection ground.
AC and DC Power