Справочник Пользователя для Lucent Technologies Release 6
DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Install and Connect Cabinets
Page 1-22
Connect DC Power and Ground
1
Mixed AC/DC Power and Ground
Figure 1-8
shows a power and ground layout for a mixed AC/DC-powered
cabinet configuration in the same equipment room with the PPN being DC
powered and the EPN being AC powered. If a second EPN is part of the system,
use the same basic connections shown in
powered and the EPN being AC powered. If a second EPN is part of the system,
use the same basic connections shown in
Figure 1-8
.
Figure 1-8.
Typical Power and Ground for a Mixed AC/DC-Powered Cabinet
Approved
ground
1/0 AWG (50 mm ) up
to 50 feet (15.2 m) or
engineered for less than 0.5
voltage drop per conductor
to 50 feet (15.2 m) or
engineered for less than 0.5
voltage drop per conductor
2
To
AC power
source
EPN
cabinet
AC power cord
AC power-
distribution
unit
Cabinet Ground Block
-48V
-48V RTN
PPN
cabinet
75A
-48V
DC power supply
System
single-point
ground
single-point
ground
Coupled Bonding Conductor
To CBC terminal
block at MDF
block at MDF
cydfacdc RPY 021798
Ground
discharge
bar