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.
■Commercial buildings
■Institutional facilities
■Industrial plants
■Any facility that has an environment with electronics-based equipment
At A Glance
■Modular design allows for flexibility
■Surge suppression range up to 500 kA per phase
■Industry’s highest surge current repeatability
■Internal/external monitoring, including neutral to ground
■UL rated 200k AIC with component level fusing for safe operation
■All modes of protection standard, any combination optional
■Sine wave tracking, EMI/RFI filtering
■UL 1449 (second edition), UL1283 and CUL listed
■ANSI/IEEE C62.11, C62.41, C62.45 categories A, B, and C3 tested
■Tested to NEMA LS1
■NEMA 12 enclosure with 3R, 4, and 4X options available
■5-year warranty
■2 sets of Form C dry contacts
■Audible alarm
■Choice of options
■Disconnect
■Transient counter
■Remote monitor panel
■Test set
Standard LM Series SPD
2
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