User Manual

Power Cabinet Initial Power Up
July 1999
2-3
SC 4812ET BTS Optimization/ATP – CDMA LMF
PRELIMINARY 2
Introduction
This section of the manual contains instructional information on the
proper power up procedure for the SC 4812ET BTS. Also presented in
this chapter is the Optimization/ATP tests to be preformed on the Power
cabinet. Please pay attention to all Cautions and Warning statements in
order to prevent accidental injury to personnel.
The following tools are used in the Power Cabinet Power Up procedures.
Required Tools
 Digital Voltmeter
 DC current clamp (600 Amp capability with jaw size to accommodate
2/0 cable).
 Hot Air Gun – (optional for part of the Alarm Verification)
Initial Inspection and Setup
Ensure all battery breakers for unused battery positions are
open (pulled out) during any part of the power up process,
and remain in the off position when leaving the site.
CAUTION
Verify that ALL AC and DC breakers are turned OFF in the Power
cabinet. Verify all DC circuit breakers are OFF in the RF cabinet. Verify
that the DC power cables between the Power and RF cabinets are
connected with the correct polarity
The RED cables connect to the uppermost three (3) terminals (marked
+) in both cabinets. Confirm that the split phase 240/120 AC supply is
correctly connected to the AC load center input.
Failure to connect the proper AC feed will damage the
surge protection module inside the AC load center.
CAUTION
Power Up Sequence
The first task in the power up sequence is to apply AC power to the
Power cabinet. Once power is applied a series of AC Voltage
measurements is required.
Table 2-2: AC Voltage Measurements
Step Action
1 Measure the AC voltages connected to the AC load center (access the terminals from the rear of
the cabinet after removing the AC load center rear panel).
2 Measure the AC voltage from terminal L1 to neutral. This voltage should be in the range of
nominally 115 to 120 V AC.
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