Quanmax QDSP-1100 Series User's Guide download pdf (Page 13)

Preface

QDSP-1100

User’s Manua

 Surge Protector

Surge protectors are available in a variety of types and usually provide a level

of protection proportional with the cost of the device. Surge protectors prevent

voltage spikes from entering a system through the AC power cord. Surge

protectors, however, do not offer protection against brownouts, which occur

when the voltage drops more than 20 percent below the normal AC line voltage

level.

 Line Conditioner

Line conditioners go beyond the overvoltage protection of surge protectors.

Line conditioners keep a system’s AC power source voltage at a fairly constant

level and, therefore, can handle brownouts. Because of this added protection,

line conditioners cost more than surge protectors. However, line conditioners

cannot protect against a complete loss of power.

 Uninterruptible Power Supply

Uninterruptible power supply (UPS) systems offer the most complete protection

against variations on power because they use battery power to keep the server

running when AC power is lost. The battery is charged by the AC power while it

is available, so when AC power is lost, the battery can provide power to the

system for a limited amount of time, depending on the UPS system.

UPS systems range in price from a few hundred dollars to several thousand

dollars, with the more expensive unit s allowing you to run larger systems for a

longer period of time when AC power is lost. UPS systems that provide only 5

minutes of battery power let you conduct an orderly shutdown of the system,

but are not intended to provide continued operation. Surge protectors should be

used with all UPS systems, and the UPS system should be Underwriters

Laboratories (UL) safety approved.

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Quanmax QDSP-1100 Series User's Guide Page 13