Installing a BBU Power Cable
A BBU power cable in an APM30H feeds power into the BBU from the EPS subrack.
Prerequisite
l The tools, such as a Phillips screwdriver, cable cutter, and multi-purpose crimping tool, are
ready.
l The PGND cable is installed.
Context
l In the triple mode scenario, two BBUs are required. A second BBU power cable is installed
in the same manner as the first BBU power cable.
l Table 6-9 lists the specifications of a BBU power cable when an EPS subrack supplies
power.
Table 6-9 Specifications of a BBU power cable
Cable One End The Other End
BBU power cable 3V3 power connector Easy power receptacle
(pressfit type) connector
NOTE
The colors and structures of cables vary according to countries and areas. If the cables are purchased
locally, the colors and structures of the cables may be different.
Procedure
Step 1 Add an easy power receptacle (pressfit type) connector to a BBU power cable. For details, see
Assembling the Easy Power Receptacle (Pressfit Type) Connector and the Power Cable.
NOTE
A 3V3 power connector is added to one end of the BBU power cable, and you only need to add an easy
power receptacle (pressfit type) connector to the other end onsite.
Step 2 Install the BBU power cable, as shown in Figure 6-79.
1. Link the 3V3 power connector at one end of the BBU power cable to the -48 V port on the
UPEU in the BBU, and then tighten the screw on the connector until the tightening torque
reaches 0.25 N·m.
2. Link the easy power receptacle (pressfit type) connector at the other end to the LOAD1
port on the EPS subrack.
CAUTION
The blue and black wires on which the easy power receptacle (pressfit type) connector is
added respectively correspond to the left and right ports on the EPS subrack.
DBS3900 (Ver.B)
Installation Guide
6 Outdoor Scenario with AC Power Supply (BBU Installed
in an APM30H)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
87
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