Emerson Liebert LM User Manual
Surge Protection
For Business-Critical Continuity
™
Liebert®LM Series
Continuous Protection For Your Business
The LM Series:
The most advanced, cost-effective product line in the industry
The LM is a surge protective device (SPD) that offers
continuous protection from damaging transients and
electrical line noise. The LM utilizes patented circuitry to
monitor the status of all protection modes, including neutral
to ground. Should protection be unavailable in any mode,
the green LED will be extinguished, and the red LED will be
illuminated. In addition, high isolation form C dry contacts
provide for remote monitoring of suppression system failure,
under voltage, and phase and power loss. LM patented
suppression integrity monitoring indicates failure for
both shorted or opened suppression components.
The LM Series can be a facility-wide
product family and may be installed
from service entrances to distribution
panels to branch panels.
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Commercial buildings
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Institutional facilities
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Industrial plants
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Any facility that has an environment
with electronics-based equipment
At A Glance
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Modular design allows for flexibility
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Surge suppression range up to
500 kA per phase
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Industry’s highest surge current
repeatability
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Internal/external monitoring,
including neutral to ground
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UL rated 200k AIC with component
level fusing for safe operation
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All modes of protection standard,
any combination optional
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Sine wave tracking, EMI/RFI filtering
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UL 1449 (s
econd edition), UL1283
and CUL listed
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ANSI/IEEE C62.11, C62.41, C62.45
categories A, B, and C3 tested
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Tested to NEMA LS1
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NEMA 12 enclosure with 3R, 4,
and 4X options available
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5-year warranty
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2 sets of Form C dry contacts
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Audible alarm
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Choice of options
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Disconnect
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Transient counter
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Remote monitor panel
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Test set
Standard LM Series SPD
2
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