User's Manual
044-05156 Rev C 36
The LNA alarm is sensed within the LNA for both low and high current. A single open collector output is read by the
micro-controller and passed on the to I
2
C interface.
4.8 Power Plant
The power plant incorporates EMI filtering, AC surge suppression, a series of circuit breakers, load sharing
rectifiers, battery backup, DC power monitoring, and a Low Voltage Disconnect transfer switch.
LVD
Monitor
System
Interface
Module
150 A
Main
CB
4 KW
(148 amp)
Rectifier
Line
Line
GND
4 KW
(148 amp)
Rectifier
Line
Line
GND
4 KW
(148 amp)
Rectifier
Line
Line
GND
4 KW
(148 amp)
Rectifier
Line
Line
GND
4 KW
(148 amp)
Rectifier
Line
Line
GND
Alpha
Amplifier
Subrack
Beta
Amplifier
Subrack
Gamma
Amplifier
Subrack
Alarm 1
Alarm 2
Alarm 3
04-0063B-B
DLNA 3
DLNA 2
DLNA 1
DLNA 0
DLNA 4
DLNA 5
30 A
CB
30 A
CB
30 A
CB
30 A
CB
30 A
CB
15 A CB
GFCI Outlet
15 A CB
AC Relay
20 A CB
Surge Pro.
30 A CB
Battery Heater
30 A CB
Reserved
Line
Line
100 A
100 A
T
EMI
Filter
Line
Line
GND
Bus
Neutral
Bus
GND
Neu
Connect when wired
as Main Panel;
Disconnect when
wired as Sub-Panel
(default)
Customer Supplied
Prewired
Prewired
600A
600A
K1
K1 K2 K3
K4
600A
AC / DC Power Block Diagram
4.8.1 Rectifiers
A series of four 4 KW rectifiers (PN: 930-00018-005) is employed to provide the OPAF power. The rectifiers source
592 amps of combined output DC power at +27 VDC under normal operating conditions. The rectifiers are
designed to operate on 180 to 264 VAC, single phase power, 47 to 63 Hz, and operate at 89% efficiency. They do
not require any minimum load to operate. The rectifier system is modular in design. N+1 redundancy is built into the
system, so a failure in one rectifier does not affect the performance of the base station. Each rectifier provides
performance data and alarms to the LVD controller and the SIM. In addition to the 30 amp circuit breaker installed
in the AC panel, each rectifier is protected by an internal 30 amp 3AG fuse.
The rectifier front panel provides 3 LEDs for quick fault determination
Rectifier LED Definitions
LED Indication
AC Good Green = OK
Temperature OK Green = OK
DC Good Yellow = OK