Alpha Technologies XM2-300CE-HP - Manual (Page 12)

The XM2-300HP powers signal processing equipment in cable television and broadband LAN
distribution systems. The XM2-300HP provides a critical load with current-limited, regulated AC power
that is free of spikes, surges, sags and noise.
During AC line operation, AC power entering the power supply is regulated by a multi-tap transformer
at the required output voltage. The regulated voltage is connected to the load via the output
connectors, and some power is directed to the battery charger to maintain a float charge on the
batteries.
When the incoming AC line voltage significantly deviates from normal, the XM2-300HP inverter
module automatically switches to standby operation and maintains power to the load. In standby
mode, the XM2-300HP powers the load until the battery voltage reaches a low-battery cutoff point.
When utility power returns, the XM2-300HP transformer module waits a short time (approximately 20
to 40 seconds) for the utility voltage and frequency to stabilize and then initiates a smooth, in-phase
transfer back to AC line power. Once the transfer is complete, the battery charger recharges the
batteries in preparation for the next event.
1.0 Introduction to the XM2-300HP
The XM2-300HP contains an impressive list of features, including:
Smart Display •
Built-in self test (with inverter diagnostics) •
Battery test (advanced battery diagnostics) •
Protective Interface Module (PIM) (factory installed option) •
A high efficiency transformer •
Improved Status menus •
Communications menu with DOCSIS • ® parameters
Using the Smart Display, the operator can view all of the power supply’s operating parameters.
Automatic scrolling (AUTO-SCROLL) is always active so there is no need to press any buttons to
view the power supply’s status or system parameters. In place of operating parameters, active alarms
automatically indicate in the Smart Display so the operator can immediately see what fault is being
detected. Troubleshooting tips automatically display in the Alarm menu screen.
The built-in metering circuits measure voltage and current, without the need for external test
equipment.
The Protective Interface Module (PIM) option allows the XM2-300HP CableUPS to provide
programmable current limits for two output channels.
The duration of battery-backed standby operation depends upon the type and number of batteries and the
load on the power supply.
NOTE:
12 017-877-B1-001 Rev. A