Power Supply
Requirement for
the Circuit
Breakers on
Customer
Equipment
Cross-Sectional
Area of the Power
Cable
Length of the
Power Cable
110 V AC dual-live-
wire
level magnetic blast
breaker)
220 V AC three-
phase
1 x 25 A or 1 x 32 A
(both using the three-
level magnetic blast
breaker)
2.5 mm
2
≤
40 m
NOTE
All power cables must comply with local standards.
3.3.2 Power Distribution of the BTS3900
This section describes the power distribution modes of the BTS3900.
Power Distribution of the BTS3900 (-48 V DC) Cabinet
The external power equipment supplies -48 V DC power to the DCDU-01 of the BTS3900 (-48
V DC) cabinet, and the DCDU-01 feeds power to each module in the BTS3900 cabinet.
shows the power distribution principles.
Figure 3-16
Power distribution of the BTS3900 (-48 V DC) cabinet
NOTE
MCB: miniature circuit breaker
3 BTS3900 Hardware Configuration
BTS3900
Hardware Description
3-20
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Issue 04 (2011-02-15)