User's Manual

Initial Power Up – continued

PRELIMINARY

1X SCt4812ET Lite BTS Optimization/ATP

08/01/2001

2-10

Table 2-4: AC Voltage Measurements

Step Action

! CAUTION

North AMERICAN Cabinet only:

If the AC voltages measured in the following steps exceed 120 V when measuring from terminals L1

or L2 to neutral or ground, STOP and DO NOT proceed until the cause of the higher voltages are

determined. The frame will be damaged if the Main breaker is turned on with excessive voltage on the

inputs.

Measure the AC voltage from terminal L1 to neutral.

North American Cabinet:

S Voltage should be in the nominal range of 115 to 120 Vac.

International Cabinet:

S Voltage should be in the nominal range of 210 to 240 Vac.

6 Measure the AC voltage from terminal L1 to ground.

North American Cabinet:

S Voltage should be in the nominal range of 115 to 120 Vac.

International Cabinet:

S Voltage should be in the nominal range of 210 to 240 Vac.

7 Steps 7a through 7c apply to the North American cabinet only. If working on a International cabinet

continue to step 8.

7a Measure the AC voltage from terminal L2 to neutral on the North American cabinet.

S Voltage should be in the nominal range of 115 to 120 Vac.

7b Measure the AC voltage from terminal L2 to ground on the North American cabinet.

S Voltage should be in the nominal range of 115 to 120 Vac.

! CAUTION

If the AC voltages measured (on the North American cabinet) in the following step exceeds 240 V

when measuring between terminals L1 and L2, STOP and DO NOT proceed until the cause of the

higher voltages are determined. The frame will be damaged if the Main breaker is turned on with

excessive voltage on the inputs.

Measure from terminal L1 to terminal L2.

S Voltage should be in the nominal range from 208 to 240 Vac.

8 Remove external AC power from the frame by setting the facility circuit breaker to OFF.

9 Install the ACLC front panel assembly and secure with the four screws removed in step 1.

10 Apply external AC power to the frame by setting the facility circuit breaker to ON.