Specifications

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 AC output voltage AC output amps Battery voltage
Battery charging amps Battery discharge amps Output volt-amps (VA) Output power (watts)
Power factor Percent loading Input frequency Output frequency
Ambient temperature Battery temperature Last inverter run time Total inverter run time
System run time Date 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 Near low battery voltage High battery voltage High AC input voltage
High AC output voltage Low AC output voltage Output overload (VA) Low remaining run time
High ambient temperature High heat sink temperature System test failure High battery temperature
Temperature probe failure High transformer temperature Tripped circuit breaker
0603447 Rev C Page 2 of 8 Rev. 9-23-09