User Manual

Initial Power Up – continued

PRELIMINARY

SC 4812ETL BTS Optimization/ATP

08/15/2000

2-10

Figure 2-7: Temperature Compensation Panel

OFF

V ADJ

SENSOR

25_ c

SENSE

–

COM

FRONT VIEW

1/2 A 250V

TEMPERATURE COMPENSATION PANEL

Power Cabinet Power Up Tests

Table 2-6 lists the step–by–step instructions for Power Up Tests.

Table 2-6: Cabinet DC Power–Up Tests

Step Action

1 Ensure ALL DC PDA circuit breakers are OFF (pulled out).

2 Be sure the procedures in Table 2-4 (if required) and (Table 2-5) have been performed.

3 Probe the VOLT TEST POINTS on the Meter Alarm Panel while pressing the 25° C set button on the

TCP (see Figure 2-7). The voltage should read 27.4 +

0.2 VDC. Adjust Master Voltage on Meter

Alarm Panel if necessary. Release the TCP 25° C set button.

4 Depending on the ambient temperature, the voltage reading may now change by up to + 1.5 V

compared to the reading just measured. If it is cooler than 25_C, the voltage will be higher, and if it is

warmer than 25_C, the voltage will be lower.

5 If the BTS is equipped with a internal backup batteries, close (push in) DC PDA Main Breaker #1

(Internal) and proceed to step 7.

6 If the BTS is connected to an external BOE containing backup batteries, close (push in) DC PDA

Main Breaker #2 (External).

7 Inside the power entry compartment at the rear of the cabinet, measure the voltage between the + (red)

terminals of the filtered DC battery compartment feedthrough (Figure 2-2) and chassis ground,

observing that the polarity is correct. The voltage should be the same as the measurement in step 2.

8 Measure the voltage between the + (red) and – (black) battery bus bars in the battery compartment.

Place the probe at the bottom of the bus bars where the cables are connected. The DC voltage should

measure the same as the previous step.

9 On the DC PDA(see Figure 2-5) set the circuit breakers to the ON position by pushing them in one at

a time in the following sequence:

S PS1 and PS2 circuit breakers

S LPA circuit breakers (four breakers, labeled 1A–1B through 2C–2D).

S HEAT EXCHANGER circuit breakers (two breakers)

S ETIB circuit breaker

S PILOT BEACON circuit breaker

S OPTION circuit breaker