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In today’s world, almost every

business depends on relatively fragile

micro-electronics to run everything

from computer networks to

manufacturing lines. Which means

that power disturbances can disrupt

or cripple equipment, causing the loss

of data, productivity, and money. 

In fact, downtime and damage 

caused by dirty power cost North

American companies an estimated

$26 billion a year.

Today’s industries are looking for cost-

effective ways to intercept transients,

provide clean power in their facilities,

and safeguard their businesses from the

astronomical, and unnecessary, cost of

dirty power. That’s why Liebert

designed the LM Series.

Utilities have generated and distributed

electrical power the same way for decades.

Unfortunately, this unconditioned

electrical power can provide abnormalities

in the electricity that runs in your facility.

This is commonly referred to as “dirty

power.”  But until the advent of sensitive

electronic equipment, “clean power” 

was never an issue.

What is “Dirty Power?”

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The causes of dirty power are as

varied as the names used to describe

it — dirty power, electronic rust,

surge, spike, transient, fluctuation,

interruption or noise. Fortunately,

abnormalities typically fall into one of

two categories — external or internal.

Hidden Problems Created 

By Dirty Power

n

Unexplained system disruptions.

n

Errors and shutdowns of data

transmission, or scrambled and

unreadable data.

n

Numerous, unexplained server

shutdowns and re-boots.

n

Component failure, often well ahead

of projected life span.

Causes Outside Your Facility

Lightning, natural disasters and

inclement weather can cause high-

transient power line voltages that can

adversely affect your power supply.

Utility switching and faults on the

utility’s distribution system can

adversely affect the quality of your

power before it even reaches your

facility. Why? Many utility systems are

aging and few power plants 

have been built over the last decade.

With increased demand for power,

their supply margins are dipping

dangerously low. The farther away

from the source of power, the greater

the risk of power quality problems.

Causes Inside Your Facility

According to some studies, 3/4 of all

power disturbances are caused by

equipment inside your building. If

your facility is more then a decade

old, chances are the wiring was not

designed to support the intensive use

of electronic equipment. In industrial

facilities, these problems are even

more complex. In fact, any device that

runs in cycles can create a drain or a

surge when it switches on or off. The

more power the equipment uses, the

bigger the affect. Even something as

small as a copier or a laser printer can

cause problems in sensitive

equipment that share the same line.

The Complete Protection Experts

Of course, you can’t control how

power is distributed. But you can

protect the equipment in your facility

from power surges and transients by

installing equipment such as surge

suppressors and filters. The issues

affecting each industry are varied. In

addition to the LM Series we offer a

complete array of power conditioning

solutions to meet a wide range of

applications, locations, and budgets.

Influencing the Industry

Liebert has received the UL 1449

Second Edition rating for the LM

Series. The fact that we’re one of the

first in the industry to receive this

rating is proof that Liebert is leading

the way with our engineering designs

and over 30 years of experience. 

Summary of Contents for Liebert LM Series

Page 1: ...Surge Protection For Business Critical Continuity Liebert LM Series Continuous Protection For Your Business ...

Page 2: ...ng n UL 1449 second edition UL1283 and CUL listed n ANSI IEEE C62 11 C62 41 C62 45 categories A B and C3 tested n Tested to NEMA LS1 n NEMA 12 enclosure with 3R 4 and 4X options available n 5 year warranty n 2 sets of Form C dry contacts n Audible alarm n Choice of options n Disconnect n Transient counter n Remote monitor panel n Test set 2 The LM is a surge protective device SPD that offers conti...

Page 3: ...h buttons and the audible alarm are located on the panel s front cover Agency Listing The specified unit is UL 1449 Second Edition Listed UL 1283 Listed and CUL Listed Control Concepts Liebert is also company certified ISO 9001 for manufacturing design and service Warranty A full five year parts warranty Form C Dry Contacts Two sets of electronically isolated form C dry contacts are provided two n...

Page 4: ...ht choose the correct configurations from each column for your application Your completed model number should look similar to the example below or LM250120YARCE Refer to Chart B for LM Series dimensional data StandardMonitoring System LEDs AudibleAlarm DualFormC Contacts LEDs Audible Alarm Surge Counter Dual FormCContacts E R T X NEMA12 Standard NEMA 3R NEMA 4 NEMA 4X Unit Per Mode Per Phase 060 0...

Page 5: ...nsient power line voltages that can adversely affect your power supply Utility switching and faults on the utility s distribution system can adversely affect the quality of your power before it even reaches your facility Why Many utility systems are aging and few power plants have been built over the last decade With increased demand for power their supply margins are dipping dangerously low The f...

Page 6: ...008 Emerson Electric Co While every precaution has been taken to ensure accuracy and completeness in this literature Liebert Corporation assumes no responsibility and disclaims all liability for damages resulting from use of this information or for any errors or omissions 2008 Liebert Corporation All rights reserved throughout the world Specifications subject to change without notice All names ref...

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