Operation Manual

Nokia MetroSite GSM Base Station, Requirements for Installation and Operation
24 (38) © Nokia Networks Oy Internal Copy DN9913471
Issue 1 en DRAFT 2 Draft
WARNING
3.6 Mains power
The power switch on the power supply unit of the Nokia MetroSite GSM
BTS does not disconnect it from the power network (AC or DC), but leaves
it in a stand-by mode. The switch has two positions: ON and stand-by. A
separate main switch on the site is considered a disconnect device for safety
and service purposes.
Follow the national legislation when working with the power supply. The
Nokia MetroSite GSM BTS must be permanently wired to a disconnect
device (e.g. circuit breaker) in accordance with current local and national
wiring standards.
All ground connections must be secure and non-removable.
All power cabling must meet the requirements of the appropriate national
standard.
The Nokia MetroSite GSM BTS has three power supply options: 230 VAC, 110
VAC and 36/48/60 VDC. The permitted voltage fluctuation for the different
options is presented in Table 5.
It is recommended that the AC mains be protected with a lightning and transient
overvoltage protector (mains wire-in protector). This protection is not included in
the Nokia MetroSite GSM BTS.
3.6.1 Power consumption
The power consumption of the Nokia MetroSite GSM BTS is dependent on the
following factors:
Table 5. Permitted operating voltage fluctuation
Nominal operating
voltage
Permitted operating
voltage fluctuation
230 VAC ±20%
110 VAC ±20%
36/48/60 VDC ±20%