Avaya G650 Installing page 48

Before you connect the G650 Media Gateway DC feed cable to the DC power source, check the DC
power source using a KS-20599 digital voltmeter (or equivalent). To check DC power:
1
Verify that the meter reads between -42.5 VDC and -54.2 VDC across the -48 VDC and -48V
Return distribution leads from the DC source.
2
Verify that the meter reads 0V between the -48V Return lead of the DC power source and the
approved ground.
3
If either step 1 or step 2 fails the verification, DO NOT PROCEED with step 4. Request that a
qualified electrician resolve the problem.
4
Connect the DC feed cable for each G650 Media Gateway to the DC power source (see
Grounding for one G650 Media Gateway,
G650 Media Gateways,
a
b
Figure 12: Typical DC power for a G650
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
48
on page 44).
Connect the red insulated 10 AWG lead to the -48V Return (positive) source.
Connect the black insulated 10AWG lead to the -48 VDC (negative) source.
1
2
3
10 AWG
4
6
circuit
+
breaker
+
8
-
-48
-
VDC
7
from rectifiers
10
9
6 AWG
on page 43 and Figure 11, Grounding for multiple
5
50A
50A
12
LVD
50A
DC power
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
Installing the Avaya G650 Media Gateway
Figure 10,
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
June 2004