User's Manual

Table Of Contents
Power Application – Normal Power–up
68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
2-18
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:
S ACLC
S DC PDA
S MAP
S 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 NO TAG or NO TAG, 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 2-5).
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 (NO TAG).
For the International cabinet:
Verify that all four (4) green LEDs on the front of the ACLC are illuminated (NO TAG).
6
On the ACLC, set RECT. 1/3 and then RECT. 2/4 branch circuit breakers ON.
All the installed rectifier modules (NO TAG) 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.
. . . continued on next page
2