Service Manual

GSM-204-323
Introduction to power distribution
31st Oct 01
Tech. 4–4
Technical Description: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W02-A
Introduction to power distribution
Power
distribution
overview
The power supply unit cage is the main power distribution assembly within the
Horizon
macro outdoor BTS cabinet.
The power distribution system consists of two main functional elements:
 Two ac distribution boxes and their associated cables.
 Six dc circuit breakers, two contactors, the multilayer busbar and dc
cables.
View of power
supply unit
cage
Figure 4-3 shows the power supply unit cage, its associated distribution boxes
and cables, with the cabinet structure omitted for clarity.
Figure 4-3 AC power supply unit cage