User's Manual

Power Application - Normal Power-up68P09255A69-3

Aug 2002

1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x

PRELIMINARY

2-21

Power Application - Normal Power-up

Power Application Procedures

After the first power application, applying power to a BTS frame does

not require performing the voltage and resistance measurements called

out in the initial power-up procedure. The only exception to this is after

maintenance when any major power system components were replaced.

Major power system components include:

 ACLC

 DC PDA

 MAP

 Internal DC power cables

Normal power application to a BTS frame is accomplished in the

following two-stage sequence:

1. AC power application

2. DC power application

Applying Internal AC Power

To apply AC power to a BTS frame, refer to Figure 2-4 or Figure 2-5,

and follow the procedure in Table 2-11.

Table 2-11: Apply AC Power to BTS Frame

Step Action

1 If the external AC power leads for the BTS frame were disconnected and reconnected, perform the

procedure in Table 2-4 before proceeding further.

2 Be sure all DC PDA circuit breakers are set to OFF (pulled out), all ACLC front-panel circuit

breakers are OFF (down), and all battery shelf circuit breakers are OFF (pulled out).

3 Be sure the MAP power switch, TCP switch, and BATT TEST switch are all set to OFF (Figure 2-9).

4 If it has not already been done, set the facility circuit breaker supplying AC power to the frame

to ON.

5 Set the ACLC MAIN circuit breaker ON.

- For the North American cabinet:

Verify that all eight (8) green LEDs on the front of the ACLC are illuminated (Figure 2-4).

- For the International cabinet:

Verify that all four (4) green LEDs on the front of the ACLC are illuminated (Figure 2-5).

On the ACLC, set RECT. 1/3 and then RECT. 2/4 branch circuit breakers ON.

- All the installed rectifier modules (Figure 2-3) will start up, and the green DC and PWR LEDs

should light on each.

NOTE

In a BTS configured for single-carrier operation (rectifier #4 not installed), a minor alarm may be

generated if the RECT. 2/4 circuit breaker is engaged before the RECT. 1/3 circuit breaker.

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