Motorola DIMETRA MTS 2, Инструкция по установке, настройке и базовому обслуживанию

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Service Current Rating Chapter 3: Site Preparation
rated min. 20 A/55 VDC should be introduced. And for the MTS4, two of these
units should be used, one for each of the two incoming DC lines. Alternatively
for the MTS4, one relay rated 40 A/55 VDC can be used if the two DC lines are
connected to one battery pack. The relays should be controlled in a way that they
disconnect the batteries once the voltage drops below 40.5 V, where the PSU in
the MTS shuts down. Two Motorola kits are available for this purpose:
•
MTS2 LVD RELAY RETROFIT KIT (Kit Number: GMDN2206A)
•
MTS4 LVD RELAY RETROFIT KIT (Kit Number: GMDN2207A)
The battery installation need a short circuit protection closest to the batteries.
The batteries should be installed in the same building and properly ventilated.
Service Current Rating
The input current rating of the DC power supply equipment shall be considered
when selecting the AC main service.
The DC power system has normal loads and start-up loads. These loads are dependent on the number
of Base Radios in the site and the size and condition of the backup battery system. The normal
load of a typical power system is provided in
Table 3-4 for several common MTS con
fi
gurations
using battery backup. Table 3-5 lists typical power loads and heat dissipation values for Expansion
Cabinets. These loads may differ for the customer designed power systems.
Table 3-4 Typical Power Loads and Heat Dissipation Values - MTS UHF Configurations
MTS UHF
Configuration
AC
(W)
Heat
AC
(W)
AC
When
Charg-
ing (W)
Heat AC
When
Charging
(W)
DC
-48 V
(W)
Heat
DC
(W) Comment
TETRA TX 10 W
MTS2 with 1 BR 140 130 520 185 135 125 No combining, low
power PA, no fans
MTS2 with 1 BR w.
Hybrid 165 155 545 210 160 150 Low power PA, no
fans
MTS2 with 2 BRs 245 225 625 280 240 220 Two TX ant., low
power PA, no fans
MTS2 with 2 BRs w.
Hybrid 295 275 675 330 285 265 Low power PA, no
fans
MTS4 with 1 BR w.
MTCC/ATCC 240 230 625 290 235 225 Low power PA,
fans
MTS4 with 2 BRs w.
MTCC/ATCC
375 355 755 410 365 345 Low power PA,
fans
3-16
6802800U74-N September 2009