Service Manual

GSM-205-423
Site requirements and considerations
31st Oct 01
Installation & Configuration: Horizon macro indoor
68P02902W08-B
CONTROLLED INTRODUCTION
Inst. 1–9
Power
requirements
The power requirements of cabinets depends on the configuration. Indoor
cabinets require either ac or a positive or negative earth dc supply.
Power consumption (dc and ac)
Table 1-6 lists typical and maximum power consumption values
Table 1-6 Power consumption of full cabinet, including digital redundancy
Typical measured consumption Maximum power consumption
1400 watts 1700 watts
NOTE Maximum power consumption figures are theoretical
values derived under extreme conditions and are affected
by variables such as temperature, component tolerances,
transmission power and supply voltage. although these
figures must be considered when planning site power
requirements, typical measured consumption values will
be lower.
Cabinet power supply requirements
WARNING All cabinets and supply cables must be protected by a
fuse or circuit breaker selected in accordance with national
and regional wiring regulations.
Table 1-7 lists the power supply requirements for the different power supply
options.
Table 1-7 Main indoor cabinet power supply requirements
Nominal voltage Voltage supply
range
Current supply maximum
+27 V dc (negative earth) +20 to +30 V dc 64 A (at nominal voltage)
–48 V dc (positive earth) –39 to –72 V dc 36 A (at nominal voltage)
120/240 V ac (50 – 60 Hz) 88 to 264 7.5 A (at nominal voltage)
NOTE Voltage transients must be less than 35 V peak amplitude
(never below 0 V). Ripple and noise must be less than
200 mV p-p (30 mV rms) over 10 Hz to 14 MHz. Voltage
application stabilization must be within the specified range
in less than 1 second.