Tripp Lite H2561 User Manual

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SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

ALL TRADEMARKS ARE THE PROPERTY OF THEIR RESPECTIVE OWNERS.

adequate. Generally, line-interactive UPS Systems do not pose a problem.

This is the subject of some debate and is generally presented as a major

issue by vendors biased towards selling online UPS Systems.

Line-interactive UPS Systems do tend to cost less than on-line UPS

Systems and operate with higher efficiency, reducing electrical costs.

In theory, an on-line UPS System battery should be used less frequently

due to input voltage variation, and will therefore last longer. This advantage

will manifest itself more as the frequency of input voltage variation

increases.

B. Harmonic Distortion

Only an on-line UPS System will address input harmonic distortion.

Because an on-line UPS System deconstructs and reconstructs the input

power, it can deliver distortion-free power. A line-interactive UPS System

will pass through input waveform distortions. Harmonic distortion tends to

be an elusive “gremlin” issue when it affects connected loads.

C. Transient Spikes (or “Surges”)

Both line-interactive and on-line UPS Systems address sudden increases in

voltage.

D. Electromagnetic Interference

While both line-interactive and on-line UPS Systems address these

phenomena, an on-line UPS typically offers far superior filtering capability.

3. Manageability

VoIP system availability is closely tied to UPS System manageability. To

ensure continuous availability, UPS Systems must be incorporated as an

integral part of a sound hardware management scheme. UPS Systems are

extremely manageable and responsive, communicating their status

automatically and triggering application shutdowns prior to battery

exhaustion in the event of a power outage or extreme voltage variation.

There are various methods to communicate with UPS systems, including

SNMP, Web, network software and direct connection. While most users

choose SNMP/Web accessory cards installed inside UPS Systems for

communication, the most essential requirement is to deploy and use some

method of communication. Without a management application running for

your UPS Systems, the day will come when the UPS batteries fail and your

system fails as your power fails. Simple management steps taken at

installation can save significant problems later.

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