Alcatel 7750 SR-12, Installation Manual

Page: 76 / 158

Installing DC PEMs
Page 74
7750 SR-12
AC-I
NPUT
P
OWER
G
UIDELINES
AC
AC P
OWER
W
ARNINGS AND
N
OTES
Caution:
• Follow the manufacturer’s instructions to install AC power shelves.
• The 7750 SR-12 must be directly connected to the DC power supply system earthing electrode
conductor or to a bonding jumper from an earthing terminal bar or bus to which the DC power
supply system earthling electrode is connected.
• The AC power source and rectifiers that supply DC power must be located within the same
premises as this equipment.
• There must be no switching or disconnecting devices in the earthed circuit conductor between the
DC source and the point of connection of the earthing electrode conductor.
Warning:
• Before connecting or disconnecting ground or power wires to the AC power shelf and rectifiers,
make sure that power is removed from the AC circuit.
Notes:
• The remote power source (circuit breaker panel, outlet, etc.) must be easily accessible.
• Each DC-input PEM requires a dedicated 100A (maximum) service or according to your local
electric code requirements.
• AC power shelves and rectifiers can be ordered through Alcatel.
• Use cables supplied with the rectifiers. If cables are misplaced or lost, within the United States,
use #6 AWG high-strand-count copper wire. If the 7750 SR-12 router is located outside the USA,
consult local and national electrical code for proper wire sizing.
• The cable must be sized for 80A service to allow for a fully loaded 7750 SR-12 system at 36V
input per NEC and local safety codes.
•
I
f you need to convert AC power to usable DC power, a minimum of one power rectifier must be
installed in an AC power shelf which is connected to a DC PEM. A second rectifier can be
installed in the same AC power shelf if necessary, depending on the chassis configuration.
• A second AC power shelf can be installed. This power shelf connects to the redundant PEM.
• For full redundancy, each power supply module should be attached to an independent power
source with a dedicated circuit breaker.