97
017-882-B0-001 Rev. E (06/2018)
3.0 Operation, Continued
3.8 Providing Power via Portable Generator or Inverter
In the event of an extended utility failure, an external AC or DC power source can provide backup power to the system.
This backup power enables the power supply to continue charging the batteries ensuring uninterrupted service to the
network. Follow the documentation and connection procedures listed below.
3.8.1 DC Powering
The AlphaGen Portable Generator provides a convenient method of providing backup DC power. Upon the loss of
commercial AC power, the existing battery strings immediately supply voltage to the Inverter Module. After some point
of battery discharge, a portable generator can be deployed to the site to supply power to the DC bus. For complete
connection and operation information of the AlphaGen Portable Generator, refer its operator’s manual (Alpha P/N 041-
028-B0).
3.8.2 AC Powering
Should it become necessary to power the CATV system with a portable AC generator, truck-mounted AC generator
or truck-mounted inverter, follow the procedures below for the protection of service personnel and powering system
equipment.
Connection Procedure:
1. Read the Smart Display to determine if there is output power to the system. If there is still power to the system,
check the battery voltage on the Smart Display:
•
If the battery voltage is greater than 34.5VDC, then approximately one hour remains to complete the
changeover to generator power before the cable system loses power to its customers.
• If the battery voltage is less than the previous numbers, move rapidly as there is not much time until the
system fails. However, exercise caution as there are dangerous voltages in the system that can shock
you or damage the cable amplifiers.
2. Verify the AC Input breaker from the utility powering system is in the OFF position. This ensures that if power
returns suddenly, you will not experience a surge in power. This also ensures when the generator is connected it
will not put AC voltage back onto the power lines.
3. Properly ground the generator by connecting a #6 AWG wire from the grounding lug on the output panel of the
generator to either a driven ground rod or the strand ground on the pole to which the power supply is mounted.
If working with a ground-mounted power supply, locate the grounding point inside the enclosure and clamp on to
that point.
Grounding the generator is
mandatory
for safety and for proper operation of the power supply.
CAUTION!
