Huawei NE05E Hardware Manual page 401

HUAWEI NE05E,NE08E
Hardware Guide
Primary power supply (rectifier)
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Table 4-9 DC voltage specifications
Item
Nominal value (V)
Voltage fluctuation range
(V)
Noise
voltage
DC distributor and control panel
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Issue 05 (2023-03-31)
Primary power supplies shall be able to operate in parallel, and there should
be current equalizing device between them.
The primary power supplies should be equipped with a current limiting device.
The output voltage of the primary power supply should meet the requirement
for initial charging of storage batteries, that is 2.35 x 24= 56.4 V DC (when
the power supply is -48 V DC)
A DC voltmeter and an ammeter should be installed for the primary power
supplies.
The efficiency of the primary power supply should be more than 85% and its
power factor more than 0.8.
Natural cooling is recommended for the primary power supply. The primary
power supply should be able to work continuously with full load within
0°C-40°C.
The output noise voltage (measured with a psophometer, plus weighing
factors) of the primary power supply should meet the requirements shown in
Table 4-9.
The primary power supply should be able to automatically shut down the
output at a low voltage.
0 Hz-300Hz
300 Hz
-3400Hz
3.4 kHz-150
kHz
150 kHz-200
kHz
200 kHz-500
kHz
500 kHz -30
MHz
The capacity of the primary power supply should be designed according to
the power consumption of the transmission equipment of the terminal office,
Copyright © Huawei Technologies Co., Ltd.
4 Hardware Installation and Parts Replacement
DC Power Supply for Transmission Equipment
-48
-38.4 to-57.6
≤ 400 mV (peak value)
≤ 2 mV (weighted noise of psophometer)
Single frequency: ≤ 5mV
effective value
Single frequency: ≤ 3 mV
effective value
Single frequency: ≤ 2 mV
effective value
Single frequency: ≤ 1 mV
effective value
Broadband: ≤
100 mV
effective value
Broadband: ≤
30 mV
effective value
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