Figure 4-2 Power distribution scheme for a cabinet supplied with -48 V DC power
Table 4-4 Specifications of fuses when -48 V DC power is supplied
Input Power
Specifications of a circuit breaker
-48 V DC
l RRU: 1x30 A
l BBU: 1x30 A
l HEUB: 1x30 A
4.3 ETP48100-A1
The embedded telecommunication power 48100-A1(ETP48100-A1) system converts external
220 V or 110 V AC input power into -48 V DC power.
4.3.1 ETP48100-A1 Components
The embedded telecommunication power 48100-A1 (ETP48100-A1) system consists of the
power monitoring unit 11A (PMU 11A), power supply unit (PSU), and ETP48100-A1 subrack.
Figure 4-3 shows the ETP48100-A1 components.
BTS3900C (Ver.C)
Hardware Description 4 BTS3900C Power System
Issue 03 (2013-05-27) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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