Connecting Grounds For Dc Battery And Power Cabinets - Avaya G650 Installing

Figure 34: Typical power and ground for a DC power cabinet
3
+
-
AC
phase
AC
phase
Figure notes
1 Approved Ground
2 1 AWG Ground Wire
3 CBC Ground Terminal Bar at the MDF (if
used)
4 System Single-point Ground Discharge
Bar
5 DC Power Cabinet J58890R or new DC
system

Connecting grounds for DC battery and power cabinets

To connect grounds for the DC battery and power cabinets:
1
Measure and cut a minimum of a 1 AWG (#70) (44 mm
ground connection terminal in the DC battery cabinet and the ground discharge bar in the DC
power cabinet. See
2
Crimp terminal lugs on each end of the wire. Terminal lugs are furnished as part of D-181895, Kit
of Parts (Comcode 105434559).
Installing the Avaya G650 Media Gateway
June 2004
1
2
10 AWG
4
6
circuit
breaker
+
8
-
-48
VDC
DC power
7
from rectifiers
10
9
6 AWG
NOTE:
The wire in the next step must be sized for a maximum voltage drop of 0.5 VDC in each
leg of the DC distribution. In this example, 1 AWG is used.
Figure 34, Typical power and ground for a DC power cabinet,
5
50A
50A
12
LVD
50A
50A
Rectifiers
RTN
Green/Yellow
Green/Yellow
Green/Yellow
6 Ground Wire for Battery (+)
7 Battery Frame Ground
8 DC Battery Cabinet
9 Main AC Supply (AC Mains)
10 AC to DC power cabinet
11 To Next DC-powered Media Gateway
12 DC load circuit breakers
2
) wire long enough to reach between the
10 AWG
-48 V RTN
RED
MCC
BLACK
-48 V
10 AWG
-48 V RTN
RED
MCC
BLACK
-48 V
10 AWG
-48 V RTN
RED
MCC
10 AWG
BLACK
-48 V
10 AWG
RED
11
10 AWG
BLACK
10 AWG
10 AWG
10 AWG
cydfdc3i KLC 050304
on page 81.
81