User Manual

Power Cabinet Initial Power Up – continued
PRELIMINARY 2
SC 4812ET BTS Optimization/ATP – CDMA LMF
July 1999
2-4
Table 2-2: AC Voltage Measurements
Step Action
3 Measure the AC voltage from terminal L1 to ground. This voltage should be in the range of
nominally 115 to 120 V AC.
4 Measure the AC voltage from terminal L2 to neutral. This voltage should be in the range of
nominally 115 to 120 V AC.
5 Measure the AC voltage from terminal L2 to ground. This voltage should be in the range of
nominally 115 to 120 V AC.
If the AC voltages are in excess of 120 V (or exceed 200
V) when measuring between terminals L1 or L2 to neutral
or ground, STOP and Do Not proceed until the cause of
the higher voltages are determined. The power cabinet
WILL be damaged if the Main breaker is turned on with
excessive voltage on the inputs.
CAUTION
When the input voltages are verified as correct, turn the Main AC
breaker (located on the front of the AC Load Center) ON. Observe that
all eight (8) green LEDs on the front of the AC Load Center are
illuminated.
Turn Rectifier 1 and Rectifier 2 AC branch breakers (on the AC Load
Center) ON. All the installed rectifier modules will start up and should
each have two green LEDs (DC and Power) illuminated.
Turn the DMAC (Digital Metering and Alarms Control) module, ON
while observing the K2 contact in the PDA assembly. The contact should
close. The DMAC voltage meter should read approximately 27.4 +
0.2
VDC.
Turn the TCP (Temperature Control Panel) ON, .The DMAC should not
be have any alarm LEDs illuminated .
Check the rectifier current bargraph displays. None should be
illuminated at this point.
If batteries are fitted, turn on the two battery heater AC
breakers on the AC Load Center.
NOTE
2