Power Supply - Huawei DBS3900 Installation Manual

1 Safety
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Local Safety Regulations
When operating Huawei equipment, you must follow the local laws and regulations. The
safety instructions in this document are only supplements to the local laws and regulations.
General Requirements
To minimize risk of personal injury and damage to equipment, read and follow all the
precautions in this document before performing any installation or maintenance.
Ensure that the instructions provided in this document are followed completely. This section
also provides guidelines for selecting the measuring and testing devices.
Installation
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Ground
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Power Supply

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Human Safety
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1-2
Only trained and qualified personnel are allowed to install, operate, and maintain Huawei
equipment.
The device (or system) must be installed in an access-controlled location.
The device can be mounted only on concrete or non-combustible surfaces.
The device must be fixed securely on the floor or to other immovable objects such as
walls and mounting racks before operation.
When installing the unit, always make the ground connection first and disconnect it at
the end.
Tighten the thumbscrews by using a tool after initial installation and subsequent access
to the panel.
Do not damage the ground conductor or operate the device in the absence of a properly
installed ground conductor. Conduct the electrical inspection carefully.
The device (or system) must be connected permanently to the protection ground before
an operation. The cross-sectional area of the protective ground conductor must be at least
2
16 mm .
For DC-supplied model: The device applies to DC power source that complies with the
Safety Extra-Low Voltage (SELV) requirements in IEC 60950-1 based safety standards.
Prepared conductors are connected to the terminal block, and only the appropriate
AWG/Type of wire is secured with the lug terminals.
Short-circuit (overcurrent) protection of the device varies according to the building's
installation. Ensure that a circuit breaker no larger than 125 VDC, 10 A (fuse) for DC
supplied model is used on the phase conductors (all current-carrying conductors).
For this device, a readily accessible disconnect device must be incorporated in the
building installation wiring.
Do not operate the device or cables during lightning strikes.
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telecommunication network voltage (TNV) circuits.
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