Nokia Solutions and Networks T5DX1 User Manual

68P64115A19

–

4

Mar 2003

1X SC 4812T-MC BTS Hardware Installation - Software Release R2.16.1.x

2-42

The objective of this procedure is to define the BTS’s site power
distribution system requirements, and install the DC power input
cabling.

Several guidelines must be followed in the design of the site power
distribution system. Depending on site requirements and specific
guidelines, two different cabling choices are offered in this section,
Option A or Option B. Read this entire section before power cabling the
BTS.

When the frame is powered on, there is the potential for an inrush
current which exceeds the steady state current draw of the frame. In
order to prevent this inrush current from affecting other equipment,
power feeds and circuit breakers should NOT be shared between the
BTS and any other equipment. This BTS is designed to comply with the
ETS 300-132-2 standard for DC inrush current.

Table 2-34 lists different site configurations, depending on the number of
carriers. Select a power distribution system configuration that is most
appropriate for your site. Figure 2-19 identifies the BTS Breaker Panel.

Table 2-34: DC Filter Power Feed Configurations

1–2

1

125A

A

3–4

1

250A

A

3–4

2

125A

B