01-07 Bts3012 Power Subsystem

BTS3012 Product Description(for 18TRX)

7 BTS3012 Power Subsystem

7

BTS3012 Power Subsystem

About This Chapter The BTS3012 power subsystem consists of the power distribution units in the cabinet. It provides stable power supply for the BTS3012 through mechanisms such as lightning protection and E1 filtering. 7.1 Components of the BTS3012 Power Subsystem The functions of the BTS3012 power subsystem are performed by the power distribution units. The power distribution units consist of the DC lightning arrester, EMI filter, PGND bar, busbar terminal socket on top of the cabinet, and the busbar at the right of the cabinet. 7.2 Power Distribution of the BTS3012 The BTS3012 power subsystem provides the input power with lightning protection and filtering, and then distributes the power to the equipment in the BTS3012 cabinet through the busbar.

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BTS3012 Product Description(for 18TRX)

7 BTS3012 Power Subsystem

7.1 Components of the BTS3012 Power Subsystem The functions of the BTS3012 power subsystem are performed by the power distribution units. The power distribution units consist of the DC lightning arrester, EMI filter, PGND bar, busbar terminal socket on top of the cabinet, and the busbar at the right of the cabinet. Figure 7-1 shows the BTS3012 power subsystem. Figure 7-1 BTS3012 power subsystem

DC lighting arrester

-48 V DC

EMI filter

Busbar

Load

BTS3012 power subsystem

7.2 Power Distribution of the BTS3012 The BTS3012 power subsystem provides the input power with lightning protection and filtering, and then distributes the power to the equipment in the BTS3012 cabinet through the busbar.

DC Power Distribution Figure 7-2 shows the power distribution in the BTS3012 when the external –48 V DC power input is used. Figure 7-2 BTS3012 power distribution (–48 V DC) User interface

Power subsystem DC lightning arrester

+

-48V -48V GND GND

-48V DC

-48V -48V GND GND

V+

V-

PGND

DAFU subrack B u s b a r

-

DTRU subrack Common subrack Fan BBU

EMI filter

PGND cable GND cable - 48 V DC power cable

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BTS3012 Product Description(for 18TRX)

7 BTS3012 Power Subsystem

The external power input is processed through the DC lightning arrester and the EMI filter, and then sent to the equipment in the cabinet through the 13 power switches on the busbar. Table 7-1 lists the relation between the power switches on the Busbar and the equipment in the cabinet. Table 7-1 Relation between the power switches and the equipment Power Switch

Equipment

SW1

DAFU subrack

SW2–SW7

DTRU 0–DTRU 5 in DTRU subrack 1

SW 8

Fan subrack

SW9–SW11

DTRU 6–DTRU 8 in DTRU subrack 0

SW 12

Common subrack

SW13

Transmission subrack

When the external +24 V DC power input is used, a DC/DC Sidepower power cabinet should be configured with the BTS3012 to convert the external +24 V DC to –48 V DC. Figure 7-3 shows the power distribution in the BTS3012. Figure 7-3 BTS3012 power distribution (+24 V DC) User interface

Power subsystem DC lightning arrester

+

DC/DC Sidepower cabinet

-48V DC

-48V -48V GND GND

+24V DC

-48V -48V GND GND

V+

V-

PGND

DAFU subrack B u s b a r

-

DTRU subrack Common subrack Fan BBU

EMI filter

PGND cable GND cable - 48 V DC power cable

AC Power Distribution When the external 220 V AC or 110 V AC power input is used, an AC/DC Sidepower power cabinet should be configured with the BTS3012 to convert the 220 V AC or 110 V AC to –48 V DC. Figure 7-4 shows the power distribution in the BTS3012. Issue 02 (2007-08-15)

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BTS3012 Product Description(for 18TRX)

7 BTS3012 Power Subsystem

Figure 7-4 BTS3012 power distribution (220 V AC or 110 V AC) User interface

Power subsystem DC lightning arrester

+

B u s b a r

-48V DC

-48V -48V GND GND

AC/DC Sidepower 110V AC cabinet 220V AC

-48V -48V GND GND

V+

V-

PGND

DAFU subrack

-

DTRU subrack Common subrack Fan BBU

EMI filter

PGND cable GND cable - 48 V DC power cable

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