User's Manual

Initial Power-up
68P09255A69-3
Aug 2002
1X SC4812ET Lite BTS Optimization/ATP Software Release 2.16.1.x
PRELIMINARY
2-10
External AC Power Connection Verification
Following verification of frame DC power system integrity, external AC
power connections must be verified. To accomplish this, the series of AC
voltage measurements specified in Table 2-4 is required.
CAUTION
Failure to properly connect the external AC power cable will
damage the surge protection module inside the ACLC.
Table 2-4: AC Voltage Measurements
Step Action
1
NOTE
This procedure is required only after external AC power wiring has been initially connected or
removed and reconnected to the frame.
n WARNING
Ensure the frame is unpowered by setting the facility circuit breaker controlling external AC power
supplied to the frame to OFF.
Physically verify all DC PDA circuit breakers are set to OFF (pulled out), and all battery shelf circuit
breakers are OFF (pulled out).
2 Open the ACLC circuit breaker access door, and set all ACLC circuit breakers to OFF (down).
3 Remove the four screws securing the ACLC front panel assembly, and remove the ACLC front panel
assembly to gain access to the AC circuit breaker input terminals (Figure 2-8).
4 Apply external AC power to the frame by setting the facility circuit breaker to ON.
5
n WARNING
Do not perform the following steps while wearing an anti-static wrist strap. Serious personal injury
can result from accidently shorting high voltage or high current circuits to ground.
! 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:
- Voltage should be in the nominal range of 115 to 120 Vac.
International Cabinet:
- 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:
- Voltage should be in the nominal range of 115 to 120 Vac.
International Cabinet:
- 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.
. . . continued on next page
2