DualLite LSN Specifications
LSN (Life Safety Network) Inverter Suggested Specifications
1. General
1.1 Scope
Furnish and install a Dual-Lite LSN (Life Safety Network) Series Inverter System to provide a reliable
source of emergency power, designed to operate during periods of utility line deficiencies without any
interruption in power supplied to the connected load. The transfer from utility power to battery power
shall utilize a true no break system to prevent sensitive loads from “winking out”. The system shall
provide a pulse width modulated sine wave output to the connected load, and be capable of powering
any combination of electronic, power factor corrected, fluorescent, incandescent or HID lighting. Other
connected loads shall include but not be limited to: building management systems, motors, security
systems and other critical voltage or frequency-sensitive electronic loads. The system shall operate from
0-100% loading, and be rated to deliver full KVA rated output at unity power factor for a minimum of 90
minutes. A boost-tap transformer shall provide regulated output during brownouts within -10% of
incoming line voltage without transferring to battery. Upon return to normal AC utility line power, the
system shall recharge the batteries without any interruption of power supplied to the load.
1.2 Codes & Standards
The Dual-Lite LSN Series Inverter System shall be listed to or comply with these standards:
• UL 924 Standard for Emergency Lighting and Power Equipment, when equipped with Type S batteries
and a 90-minute run time.
• UL 1778 Standard for Uninterruptible Power Supply Equipment, when equipped with Type G or Type
N batteries, or run times other than 90-minutes.
• ANSI C62.41: ANSI C62.45 (Cat. A & B)
• FCC class A
• National Electrical Code (NFPA 70)
• The Life Safety Code (NFPA 101)
2. Product
2.1 Manufacturer
The Central Inverter System specified herein shall be the LSN Series Inverter System manufactured by
Dual-Lite, a Hubbell Lighting, Inc. Life Safety Products Brand.
2.2 Category and Type
Furnish and install a Dual-Lite LSN Inverter System that shall supply a minimum of _____KVA and
____KW @ unity power factor, for a period of ____ hours upon interruption, brownout, or failure of the
monitored AC utility line.
2.3 Operation
System operation shall be fully automatic and include a linear transformer with boost tap and surge
protection. In emergency mode, true “no break” Pulse Width Modulated (PWM) power shall be supplied
to the load at all times.
The charging system will maintain the batteries at full capacity at all times.
Three on-board microprocessors will continuously monitor charger settings and the system’s overall
readiness. Diagnostic circuitry shall include a multi-rate, software controlled charger, continuous
monitoring of 265 operating parameters, and programmable system testing capabilities.
Thirty individual alarms and nine system logs shall be provided. All alarms and logs shall be
automatically recorded and readily displayed via the User Interface Display (UID). The system shall also
include one RS232 serial port for remote two-way communications
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LSN (Life Safety Network) Inverter Suggested Specifications
Automatic overload and short circuit protection in normal and emergency mode shall consist of 150%
momentary surge capability, 120% overload for 5 minutes, and 110% overload for 10 minutes.
Protection shall also include a low battery voltage disconnect, AC input circuit breaker, a DC input
breaker, and an AC output fuse. A digitally generated sinusoidal output waveform (PWM) with less than
5% total harmonic distortion at rated linear load shall be provided to the connected load. A boost tap
transfer protection circuit shall maintain the desired output voltage during low voltage “brownout”
conditions without continuously switching to batteries, thereby preserving battery capacity.
2.4 Input Voltage
Available input voltage selection shall include 120, 208, 240, 277, and 347 volts, +10% to -15%, single
phase, with a frequency of 60Hz. The AIC rating shall be 42,000 RMS symmetrical amperes.
2.5 Output Voltage
Available output voltage shall include 120, 208, 277, 120/240, 120/277, 120/208, 347, 120/347 volts, +/5%, single phase sine wave, with a frequency of 60Hz + 0.05Hz.
The output frequency, when on utility power, shall be as supplied by the utility.
2.6 System Diagnostics
The user interface display (UID) shall include an array of 5 LED’s, a 2-line, 40-character LCD display,
and a keypad for system input. The UID shall be menu-driven and display individual system parameters
using a numbered code (Hot Key). The LED array shall indicate, by color code, the following status
modes: AC output presence (green), system ready (green), battery charging (red), inverter “ON”
(amber), and alarm functions (red).
To ensure only authorized personnel have system access, a multi-level password shall be required to
change all functions and operating parameters.
A continuous scrolling display of the following metered functions shall be provided:
AC input voltage
Battery charging amps
Power factor
Ambient temperature
System run time
AC output voltage
Battery discharge amps
Percent loading
Battery temperature
AC output amps
Output volt-amps (VA)
Input frequency
Last inverter run time
Battery voltage
Output power (watts)
Output frequency
Total inverter run time
2.7 Alarms
Thirty audible and visual alarms shall be provided, with automatic logging of the twenty-five most recent
events. An alarm acknowledgement feature shall be provided, which will allow the user to silence only
the current audible alarm without silencing other alarms or clearing the alarm condition until the fault has
been addressed.
An alarm shall be sounded if any of the following operating conditions occur:
Low battery voltage
High AC output voltage
High ambient temperature
Temperature probe failure
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Near low battery voltage
Low AC output voltage
High heat sink temperature
High transformer temperature
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High battery voltage
Output overload (VA)
System test failure
Tripped circuit breaker
High AC input voltage
Low remaining run time
High battery temperature
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LSN (Life Safety Network) Inverter Suggested Specifications
2.8 Manual and Automatic Testing
Manual and automatic test modes shall be provided.
• Manual user-initiated system test at any time
• Automatic weekly, monthly and annual self-diagnostic tests
• Automatic recording of the last twenty events in a Test Results log
2.9 Battery Charger
A three-step float charger shall be software controlled and temperatures compensated, and charge the
batteries continuously while in normal “standby” condition (non emergency mode).
Following a power failure, the constant current charger mode shall be initiated until battery voltage
reaches the equalize stage. Equalize stage shall be maintained until the charging current drops to .5
amps, or 0.3% of the battery amp/hour rating. Battery voltage shall then enter the float stage.
2.10 Batteries
To comply with UL Listing to Standard 924 (Emergency Lighting), Type S batteries shall be designed to
provide a minimum 1.5 hours rated output voltage to the connected load in emergency mode without
dropping below 87.5% of nominal battery voltage.
The batteries shall be enclosed in an enclosure that permits easy maintenance without requiring
The following battery types shall be available:
____Sealed Lead Calcium, VRLA, (Type S): Maintenance Free Construction
Standard battery supplied, unless otherwise specified. Requires no addition of water over its
useful life. The case and cover shall be constructed of polypropylene, contain a UL recognized
low-pressure safety release vent, and be non-gassing in normal use. Life expectancy is 10yeasr at 77°F (25°C) ambient temperature.
____Sealed Lead Calcium VRLA (Type G): Maintenance Free Construction
An optional long-life battery. Requires no addition of water over its useful. Life expectancy is 20years at 77°F (25°C) ambient temperature.
____Wet Cell Nickel Cadmium (Type N): Wet cell construction
An optional long-life battery. Requires maintenance inspection and the addition of water to the
cells when required. Pocket plate construction with a translucent case. Life expectancy is 25years at 77°F (25°C) ambient temperature.
2.11 System Options
The following optional factory-installed equipment shall be available (see catalog for additional details).
___ Normally-On Output Circuit Breaker Options:
___ Monitored (recommended) ______Voltage ____ Amp Rating (20 amp is standard)
___ Unmonitored ______Voltage ____ Amp Rating (20 amp is standard)
A maximum of fourteen monitored positions (twenty positions without alarms - unmonitored) are
available for all models. Single pole 120V and 277V breakers occupy one position each, while
double pole 240V breakers occupy two positions (7 monitored, 10 unmonitored) each. When
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LSN (Life Safety Network) Inverter Suggested Specifications
specifying circuit breaker options, decrease the available number of output breakers by the
proper number of positions chosen.
___ Normally-Off Output Breaker Options:
___ Monitored (recommended) ______Voltage ____ Amp Rating (20 amp maximum)
___ Unmonitored ______Voltage ____ Amp Rating (20 amp maximum)
Used when the lighting fixtures are to be energized only during a power outage. The normallyoff circuit breakers are user programmable for a delay of up to 999 seconds. A maximum of
eight positions are available for all models. Single pole 120V and 277V breakers occupy one
position each, while double pole 208V or 240V breakers occupy two positions each. When
specifying circuit breakers, decrease the available number of output breakers by the proper
number of positions chosen.
___ Alternate Run Time (AR):
UL Listed to Standard 1778 (Uninterruptible Power Supply Equipment)
Up to four-hour run time is available. Example: AR240.
[Note: The National Electrical Code (NEC) requires a minimum of 90-minute run times for
emergency lighting installation requirements].
___Short Battery Cabinet (SBC):
For applications where headroom is limited, the Short Battery Cabinet (SBC) can be used to
reduce the overall installation by 15 inches. Available with 1.0, 2.0, 2.7, 3.7, 5.5 and 6.6 KVA
systems with Type S batteries only. Consult factory for additional details
___ Cat 60 Cabinet Locks (CL60):
Universal cabinet locks for all electronic and battery cabinets
___ Email Device (EML):
A device that automatically notifies the user of system test results and alarm conditions. The
email device sends detailed notifications to up to six pre-programmed email addresses.
Requires customer supplied CAT5 cable connected to user network. Each designated email
address automatically receives a unit status report following all weekly, monthly and annual
tests or when an alarm condition is detected. Status reports include readings on key
operating parameters, as well as complete alarm and inverter log printouts in uncoded userfriendly descriptions.
___ Remote Status Panel (RSP):
Provides remote system annunciation of inverter and alarm status. Operates up to 1,000 feet
The following color-coded indicators are provided:
Alarm LED (Red)
Audible Alarm
Charging LED (Red)
Emergency Power LED (Yellow)
Ready LED (Green)
A/C On LED (Green)
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LSN (Life Safety Network) Inverter Suggested Specifications
___ System Monitoring Terminals (SMT):
Provides two PC-board mounted terminal blocks to allow customer access to RSP (Remote
Status Panel) outputs, Inverter and Alarm active relays. These low power contacts (commonly
referred to as “dry contacts”) can be set for a time delay of up to 999 seconds. They
incorporate normally-open and normally-closed contacts.
Access to +12 Volts DC, DC ground and two normally-off relay driver signals are also
___ Charger Upgrades (C10 or C20):
For enhanced battery recharge time:
• C10 – 10 Amp charger upgrade. Available on 1.0kVA – 4.8kVA Series
• C20 – 20 Amp charger upgrade. Available on 5.5kVA – 17.5kVA Series
○ Not available with 120V input on 6.6kVA and above.
○ Not available with 208V input on 12.5kVA and above.
○ Not available with 204V input on 15kVA and above.
___ Internal Maintenance Bypass Switch (IBS):
A factory-installed, internally-mounted three-position “make before break” switch. Compatible
with all input/output combinations and any combination or quantity of output circuit breakers.
Allows connecting the utility power supply to the load without placing the inverter in
emergency mode.
___ Extended Training (ATV):
If user personnel are not available for training during the factory start-up procedure, a DualLite technician shall be scheduled for a later visit at additional cost.
2.12 System Accessories
The following accessories shall be available with the system:
___ External Maintenance Bypass Switch (MBB or BBM):
The external maintenance bypass switch allows power to be removed from the inverter
system and remain connected to the load. This allows the inverter system to be completely
removed, replaced or repaired without interruption to the load. The switch is supplied in a wall
mounted, NEMA 1 enclosure. Available in Make-Before-Break (MBB) or Break-Before-Make
(BBM) configurations. Not for use with systems having more than one single-pole output
circuit breaker, or systems with different input and output voltages.
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2.13 Maintenance, Service and Enhanced Warranty Plans
The following shall be offered to assure initial and long term viability of the system through additional
maintenance and service plans and/or through enhancements to the standard two-year electronics
limited warranty.
FS Factory Start-Up (FS):
Factory Start-Up shall be supplied as an inverter system standard at no additional cost. The
Factory Start-Up process shall verify correct installation and operation of the inverter system.
Trained, factory-authorized technicians shall administer an on-site, point-by-point check of the
system to include:
●Internal electrical connections
●AC input and Battery connections
●System operating voltages
●System operating parameters
●Initial system “power-up
●Battery discharge test
●Correction of existing deficiencies
●Final testing, calibration and recording
●Training of available operating personnel
____ Monitoring Program (MP):
The unique, optional Monitoring Program shall provide for the continuous monitoring of the
inverter system by the Factory Technical Support Group. All weekly, monthly and annual
system tests shall be reviewed and analyzed for early warning signs of system malfunction.
Any failures shall be automatically relayed to the service department where corrective action
can be recommended to the owner/operator. For activation, a user supplied dedicated analog
phone line must be available.
____ Preventive Maintenance Plan (PMP-____):
The Preventive Maintenance Plan shall provide optional warranty system coverage beyond
the standard two-year factory warranty. PMP warranty service excludes the batteries, which
are covered under a separate warranty plan. The purchase of a Fax Modem option shall be
required when a Preventive Maintenance Plan is selected.
Available Preventive Maintenance Plans (Fax Modem Option Required)
PMP-A1: Additional 1-year
warranty and 1-year service
coverage, weekdays, MondayFriday, 8AM to 5PM EST.
PMP-B1: Additional 1-year
warranty and 1-year service
coverage, 24 hours/day,
7 days/week, no holidays.
PMP-C1: Additional 1-year
warranty and 1-year service
coverage, 24 hours/day, 7
days/week, including holidays.
PMP-A2: Additional 2-year
warranty and 2-year service
coverage, weekdays, MondayFriday, 8AM to 5PM EST.
PMP-B2: Additional 2-year
warranty and 2-year service
coverage, 24 hours/day,
7 days/week, no holidays.
PMP-C2: Additional 2-year
warranty and 2-year service
coverage, 24 hours/day, 7
days/week, including holidays.
PMP-A3: Additional 3-year
warranty and 3-year service
coverage, weekdays, MondayFriday, 8AM to 5PM EST.
PMP-B3: Additional 3-year
warranty and 3-year service
coverage, 24 hours/day,
7 days/week, no holidays.
PMP-C3: Additional 3-year
warranty and 3-year service
coverage, 24 hours/day, 7
days/week, including holidays.
If the standard factory warranty has expired before selection and purchase of a PMP plan, an on-site
evaluation shall be scheduled to determine if the system requires parts and/or labor to return to factory
specifications. Parts and labor required shall be charged at additional costs.
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LSN (Life Safety Network) Inverter Suggested Specifications
2.14 Mechanical
The system shall be contained in a code gauge, steel NEMA 1 enclosure, finished in a scratch
resistant, powder coat finish, with a key lock, conduit knockouts at the top and sides, and front opening
doors with air filters. Enclosures shall be designed to allow stacking to minimize the overall system’s
footprint. The system shall include a plenum to expel heated air from inside the unit. All components
shall be front accessible and incorporate a modular design and a quick disconnect means to facilitate
3. Execution
3.1 Wiring
Input and output conductors shall be enclosed in separate conduits.
All load side wiring shall be sized as required for voltage drop conditions to assure proper operation of
connected loads.
3.2 System Operation
The system shall allow connection of both “normally on” and "normally off” (optional) loads. Connected
loads shall receive utility power during normal operation, and ‘no break” system inverter power during
utility interruptions.
3.3 Connected Loads
In emergency mode, the inverter system shall supply true digitally-generated AC sinusoidal output.
Refer to plans for type and location of loads served by the system.
3.4 Factory Start-up
A factory trained service representative shall be dispatched to perform the initial system start-up. Refer
to Section 2.13 for additional information.
3.5 Drawings and Manuals
___Installation/Users manual(s) for locating, mounting, interconnecting, and wiring the system with
operating and preventive maintenance procedures. (Can be located on www.dual-lite.com)
3.6 Installation
The system shall be installed in accordance with all appropriate manufacturers’ instructions and in compliance
with all appropriate codes.
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3.7 Warranty
The system shall be guaranteed, under normal and proper use, against defects in workmanship and
materials for a period of two years from the date of shipment. Batteries supplied as part of the systems
shall be covered under a separate pro-rata warranty as described below.
• Sealed Lead Calcium VRLA, 10-year life expectancy (Type S) – one-year full replacement
warranty plus an additional nine years pro-rata.
• Sealed Lead Calcium, 20-year life expectancy (Type G) – One year full replacement warranty
plus an additional fourteen years pro-rata.
• Wet Cell Nickel Cadmium, 25-year life expectancy (Type N) – One year full replacement
warranty plus an additional fourteen years pro-rata.
Note: Within 90days from date of shipment, batteries shall be connected to an energized charging
system to maintain the Warranty. Battery life and capacity is rated at an optimum operating temperature
range of 68°F to 85°F. Operating temperatures outside this range will affect battery life and capacity.
Batteries are rated at 100% capacity at 77°F.
3.8 Maintenance and Service
Maintenance and service programs shall be made available by the supplier to assure long-term
reliability of the system. Refer to Section 2.13 for additional information.
Specifications subject to change without notice.
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