Plugging In Ac Power; Connecting To Dc Power; Dc Power Layout - Avaya G650 Installing

Plugging in AC power

Once you verify that the ground and the voltages are correct for the installation, plug in the AC
power.
Before you turn on the system, check the AC power in the equipment room. Use a KS-20599
digital voltmeter (DVM) or an equivalent meter.
To check AC power:
1. Verify that the voltage meter reads either 90 VAC to 132 VAC or 180 VAC to 264 VAC.
Measure the AC voltage between the hot side and neutral side of the receptacle. Advise the
customer to have a qualified electrician correct any problems before proceeding to Step 2.
2. Verify that the voltage meter reads 0 VAC. Measure the voltage between the neutral side
and ground side of the receptacle. Advise the customer to have a qualified electrician
correct any problems before proceeding to Step 3.
3. Set the AC main circuit breakers to OFF when you finish checking the AC power.

Connecting to DC power

DC power layout

Figure 11: Typical DC power layout for a G650
a G650 Media Gateway.
Each G650 Media Gateway can be equipped with a maximum of two 655A power supplies. One
power supply is always provided in slot 0, and a redundant unit can be provided in slot 15. DC
power is supplied by a DC feed cable to one connector on the backplane of the G650 Media
Gateway. The power is then bussed to each power supply slot. AC current and DC current can
be supplied to the 655A power supplies at the same time. When both AC current and DC
current are present, the 655A uses AC first. The 655A power supply then changes to DC
current without any interruption in service if the AC current fails.
Each G650 Media Gateway, with either a single power supply or redundant power supply, draws
a maximum of 17 A of DC current.
Installing the G650 Media Gateway
on page 37 shows a typical DC power layout for
Issue 2 February 2007 35