Motorola Horizonmacro outdoor, Руководство по установке и настройке, Страница: 152 / 212

GSM-204-423 Auxiliary equipment housing (AEH) connections
31st Oct 01
Inst. 5–10
Installation & Configuration: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W03-A
Auxiliary equipment housing (AEH) connections
Earthing the
AEH
WARNING Do not daisy chain cabinet earths together.
Do not make ac input power connections at the main
power source at this time. Connecting input power is
the final installation procedure, carried out as part of
commissioning in Chapter 6 of this category.
Cabinets must be earthed with a conductor capable of
carrying the full fault current of the overcurrent protection
device.
To earth the AEH:
WARNING The AEH centre cross beam earth stud is connected to
the right side earth plate when supplied.
The AEH can be earthed at either side, however, if left
side AEH earth plate is to be connected to site earth,
centre cross beam earth stud must be disconnected from
right side and reconnected to left side AEH earth plate.
1. Connect the earth plate stud to the site earth using a 35 mm
2
cross-sectional area, green and yellow sheathed, stranded conductor.
2. Ensure the earth stud on the cabinet centre cross beam is connected to
the AEH earth plate that is to be connected to the site earth, or to the BTS
cabinet earth plate, through the expansion plate.
Connecting dc
cables to the
AEH
CAUTION When using external batteries, the Horizon macro outdoor
BTS cabinet internal batteries must be switch isolated to
ensure correct operation of the temperature-compensated
battery charging system.
The auxiliary equipment cabinet requires –48 V dc connections to operate. The
dc cables come from the Anderson connectors on the dc interface panel in the
BTS cabinet. The dc cables from the BTS cabinet connect to the rear pair of
Anderson connectors at the base of the power distribution box.
The supply to the auxiliary equipment housing can be isolated using the EXT
BATT circuit breaker on the dc circuit breaker panel in the main cabinet.
Battery power from the auxiliary equipment housing to the main cabinet can be
isolated using the circuit breakers on the front of the power distribution box.
The front pair of Anderson connectors on the power distribution box can be
used to connect either a second BTS cabinet, (refer to Configuring battery
backup in this chapter), or an additional auxiliary equipment housing, thus
connecting the batteries in parallel to provide extra battery capacity, further
increasing backup duration..