Littelfuse.com
© 2022 Littelfuse, Inc.
Rev: 081722
1 of 10
LPS Series Operations & Maintenance Manual
LPS SERIES SHUNT TRIP DISCONNECT SWITCH
Overview
The Littelfuse LPS series disconnect switch is an integrated power controller designed to meet the requirements of NFPA
®
70
(National Electrical Code
*
), NFPA 72, ANSI/ASME A17.1 (Safety Code for Elevators and Escalators), NFPA 13 (Installation of
Sprinkler Systems) and other state and local jurisdiction requirements with regard to ac power for elevators.
The Littelfuse LPS series disconnect switch may be ordered in 30 A, 60 A, 100 A, 200 A or 400 A configurations, for 208, 240,
480 or 600 V ac (60 Hz), 3 or 4 wire systems. The Littelfuse LPS series disconnect switch may be configured for use as Service
Equipment with the addition of a 2-port ground lug and the appropriate label per NEC Article 230.66 (option S).
Enclosures are available for the Littelfuse LPS series disconnect switches which meet NEMA 1, NEMA 3R, NEMA 4/4X and
NEMA 12 standards.
The Littelfuse LPS series disconnect switch is designed to interrupt the source of incoming ac power for a single cable or
hydraulic elevator, upon a signal from the Fire Alarm Control Panel (FACP). This is primarily to minimize the risk of electric shock,
and to prevent impact to the mechanical safety features of an elevator, caused by water released from the fire sprinkler system.
* National Electrical Code and NEC are trademarks of their respective owners.
Littelfuse.com
© 2022 Littelfuse, Inc.
Rev: 081722
2 of 10
LPS Series Operations & Maintenance Manual
LPS SERIES SHUNT TRIP DISCONNECT SWITCH
Description
The Littelfuse
®
LPS Series provides a simple and economical
solution for applications that require selective coordination
and shunt trip capabilities.
Utilizes Class J time-delay fuses that are easily coordinated
with other system overcurrent devices. The shunt trip
capability allows the LPS Series to meet the ANSI/
ASME standard that requires power to be automatically
disconnected before water is turned on by the fire safety
system.
Applications
Elevator circuits
Data processing rooms
Building emergency systems
Web Resources
Download technical information: Littelfuse.com/lps
Specifications (Disconnect Switch)
Supply Voltage Rating* 208 V, 240 V, 480 V
Ampere Range 30 A, 60 A, 100 A, 200 A, 400 A
Enclosures NEMA 1 (standard)
NEMA 3R, NEMA 4, NEMA 12 (optional)
Approvals UL Listed (File: E219511)
*Contact factory for 600 V options.
Specifications (Shunt Trip)
Voltage Rating 120 V, 60 Hz
Max Inrush 4 A
Max On time 1.5 cycles
Momentary Inrush 140 VA
SCCR Refer to table on following page.*
*Contact factory for 400 A panel SCCR
Features/Benefits
Pre-engineered single unit, which makes procurement
easier than systems with multiple components
Reduces labor costs up to 66 % and total installation
costs by over 30 %
Pre-installed UL Listed Class J fuse holder – unique
Class J size eliminates the need for any rejection type
fuse clips
Optional features offer flexibility for a variety of
applications
Color coded control power terminal blocks
UL Listed package
Cu and AI wire rated
Pre-wired control circuits lower installation time
Lockable operating handle meets all code and safety
requirements (accepts up to 3 locks)
Every unit is fully tested before delivery
Options
Control power transformer with fuses and blocks
Fire safety interface relay
Key to test switch
Pilot light ”On”
Isolated neutral lug
Mechanical interlock auxiliary contact for hydraulic
elevators with automatic recall (5 amp 120 V ac rated)
Fire alarm voltage monitoring relay
Enclosure
Surge Protection Device
Option to bypass alarm when performing maintenance
(-AZ option)
XPress-Ship™ service offers 48 hours direct shipment
service on select fully loaded LPS Series Shunt Trip
Disconnect Switches