true online UPS system pic
Nova True Online UPS System
Navy Galaxy Series


1.5 – 2.5 KVA True Online UPS

This rugged Navy Galaxy-Series true online UPS System is specifically designed for submarine and shipboard applications in compliance to MIL-STD-1399, MIL-STD-461, MIL-STD-901, MIL-STD-167, MIL-STD-810, AND MIL-STD-740. The true online UPS system pictured is a compact 2.5 KVA unit built for use on the US Virginia Class Submarine, as well as other high profile shipboard and submarine applications in US and US-friendly fleets worldwide. This true online UPS model has a three-phase power factor corrected (PFC) input of 115 VAC L-L, 50/60 Hz per MIL-STD-1399 Section 300 Type I and a pure sinewave galvanically isolated output of 115 VAC, Single-Phase. Single-phase input is optional, and output frequency is available in 50, 60, or 400 Hz (specify.) This true online UPS System contains all of the features standard on other Galaxy-Series units, as well as additional features that make it ideal for Naval applications. For a free, comprehensive price quote for this true online UPS system, please contact Nova Electric.

Model Selection

Model KVA Input Output UPS (Lbs) Run Time
NGRS11-1.5K60-115-115 1.5 115VAC 115 VAC 115 10 min
NGRS11-1.5K60-115(D)-115 1.5 115VAC L-L 115VAC 115 10 min
NGRS11-2.5K60-115-115 2.5 115VAC 115VAC 125 10 min
NGRS11-2.5K60-115(D)-115 2.5 115VAC L-L 115VAC 125 10 min


  • • Single Phase Input
  • • RS232 or SNMP Interface
  • • Monitoring Software
  • • Chassis Slides
  • • MS Connectors Mates
  • • High Speed Mechanical Transfer Switch
  • • Custom Paint & Markings


  • Optional Input Voltages available (select):
    115, 120, 208, 220, 230, 240 VAC. 1Ø
    115/200, 120/208, 220/380 3Ø
  • Optional Input Frequencies available (specify): 50, 60 or 400 Hz
  • Optional Output Voltages Available (specify): 115, 120, 208, 220, 230, 240 VAC 1Ø
  • Output Frequency (specify): 50, 60 or 400Hz
  • Voltage Regulation: +/- 2% NL to FL
  • Frequency Regulation: 0.1%
  • Harmonic Distortion: 2% THD Typical 5% Max
  • Input Power Factor: 0.99
  • Efficency at full load: 82% typical
  • Overload: 125% for 5 minutes
  • Premium 10 year life wide temp batteries which are sealed, maintenance free, and user replaceable
  • AC & DC Input Circuit Breakes
  • Low Battery Shut Off
  • Overload and Thermal Protection
  • Audible Alarm with Silence Switch
  • Optional EPO
  • Operating Temperature: -20° to +50° C per MIL-STD-810D
  • Storage Temperature Range: -40° to +71° C
  • Humidity: to 95% non-condensing
  • Elevation: 15,000 Ft. (4.572m) operating
  • Audible noise: Less than 55 dBA at 5 ft. (1.5 m)
  • Cooling: Forced air (exhaust at rear) Airflow 200 CFM Maximum
  • EMI: Per MIL-STD-461B/E
  • Vibration: Per MIL-STD-167-1
  • Shock: 20g for 20ms half sinewave per MIL-STD-901C Grade A
  • Structureborne Noise: MIL-STD-740B Grade A
  • System Status: Green/Red
  • Utility Off: Red
  • UPS Off: Red
  • Low Battery: Red
  • Logic Fault: Red
  • UPS Overload: Red
  • Over-Temperature: Red
  • Load on Utility: Red (with XFR SW option)
  • Alarm Contacts: Standard
  • RS 232 or SNMP: Optional


MIL-STD-1399 Section 300B: For Type I apparatus

Additional Ruggedization to meet MIL-STD-901, MIL-STD-167, and MIL-STD-810: This true online UPS System’s construction is extremely robust, and ruggedized throughout. All components and modules within the unit are mounted using additional steel brackets and heavy-duty stainless-steel hardware, which is then further secured using Loctite and RTV where required. All boards are conformal-coated (Acrylic MIL-I-46058 Type R) for maximum resistance to potential condensation and fungus growth. The true online UPS unit was tested and qualified as follows:

MIL-STD-901C for Grade A, Class II Equipment: Shock test with half sinewave, 20ms duration, 15g peak acceleration shock pulse.

MIL-STD-167-1 for Type I Equipment: Vibration test with range of 4 Hz low frequency to 33 Hz high frequency.

MIL-STD-810D: Operating Temperature Tests including High Temperature Test per Procedure II, Method 501.2, Table 501.2-II Ambient Air, 4 Cycles @ 24 Hours per cycle, Low Temperature Test per Procedure II, Method 505.2, Table 505.2-I Region CO, 4 Cycles @ 24 Hours per cycle, and Temperature Shock Test per Procedure I, Method 503.2, between 0-40 degrees Celsius, 4 Cycles @ 24 Hours per cycle.

Internal EMI Reduction Package to meet MIL-STD-461: The design of this true online UPS system is specifically focused on reducing EMI emissions. The true online UPS contains substantial internal filtering to minimize EMI emissions. Inputs which may be susceptible to transients are protected by several methods, including MOVs. All internal magnetics are shielded with copper and mu-metal to further minimize emissions. The compact rack mount chassis (5.25” High x 19” Wide x 24.125” Deep) is specifically treated with low surface resistivity finishes on the interior. All aluminum parts are treated with clear irridite. The steel parts are treated with zinc plate, followed by a clear chromate. All exterior portions (except for mating surfaces) are then painted with glossy ANSI-61 gray to assure excellent bonding of mating sheet metal parts. All input and output ventilation filters include metal honeycomb-style filters.

MIL-STD-461B Part VI for EMI Class A5: CE01, CE03, CS01, CS02, CS06, CS09, RE01, RE02, RS01, RS02, RS03.

Super-Rugged, Long Life Hawker Energy Batteries: Internal Hawker Energy sealed, maintenance free batteries provide 10 minutes back up time at full load. These batteries are extremely resistant to shock, vibration, and wide temperature ranges. Also, they have a very long service life (8-10 years measured at 25 degrees Celsius ambient temperature) for a minimum of maintenance. The batteries are user replaceable.

Structureborne and Airborne Noise: The rugged Navy Galaxy-Series true online UPS System was tested and qualified to MIL-STD-740B for Grade A Type III Equipment.

Pressure Tests for Submarine Usage: The Navy Galaxy Series true online UPS System was tested to atmospheric pressure within the range of 750-1250 millibars, and maintained standard operation to specification to the following test pressures for 1 hour:
250 millibars above ambient (applied within 30 seconds and released within 30 seconds)
250 millibars below ambient (applied within 30 seconds and released within 30 seconds)
Ambient pressure of 1000 millibars

Some of the features shown above can be incorporated on our standard UPS models – Nova Electric offers Rugged true online UPS Systems for Naval Applications in all of our standard rack-mount packages, from 1-6+ KVA. We can also incorporate these additional features on our DC-AC Inverters and Frequency Converters as well. If you have a unique submarine or shipboard application that calls for a rugged AC power source, please don’t hesitate to contact us – we have over 38 years of experience designing and manufacturing America’s best power conversion equipment for harsh environment applications!

For more information on a free price quote for these rugged UPS and military UPS models, please contact Nova Electric.

Certain models above have been tested and qualified to the above specifications. Consult the factory for details.

The appearance of U.S. Department of Defense (DoD) visual information does not imply or constitute DoD endorsement.