Instruction Manual

Doc. #: 0260011-J0 Rev B

2. Product Description

The Alpha Modular Power System 24 HP (AMPS24 HP) is a unique, high performance AC power

system that is designed to provide highly reliable back-up power to cable headend, telecom or

server room facilities.

The AMPS24 HP features hot swappable 1.5 kVA/1.2 kW AC power modules and optional 1.8

kW rectiﬁer modules that are the building blocks of a highly reliable power system with 99.999%

availability, 93% efﬁciency, and high power density. A smart, uniﬁed controller with an integrated

Ethernet/SNMP monitors and manages both AC power modules and rectiﬁer modules through

a remote web-based GUI. The AMPS24 HP is designed for installation in a climate-controlled

environment where ambient temperatures are between 0°C to 50°C (32 to 122°F).

2.1 Theory of Operation

AMPS modules feature a revolutionary high performance technology that combines the high reliability

of a telecom-grade inverter system with the high efﬁciency of a UPS.

Each AMPS module includes a reliable 48VDC-to-120VAC inverter as well as an AC-to-DC rectiﬁer.

When AC Mains is available, AC power is converted to a high voltage DC bus, which is then

converted back to AC. In this high performance (HP) mode, AMPS delivers fully conditioned, line-

regulated telecom-grade AC power with 93% system efﬁciency.

When AC Mains is unavailable, DC battery power is converted to AC with zero transfer time. An

intelligent high voltage DC bus decides when to draw power, and how much power to draw, from AC

or DC source. During AC input brownout condition, output power is supplemented by battery power.

In case of a fault, advanced DSP controls allow the AMPS module to isolate itself, while the rest of the

system continues to power the load (with reduced output).

DSP

Telecom Grade

AC Output

DC In

Mains

communication

CAN bus external

Dual redundant

synchronization

communication and

between modules