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Galaxy Lightweight Series 270 VDC Nominal Pure Sine Wave Rack Mount DC-AC Inverters


  • Meets MIL-STD-810, MIL-STD-461, MIL-STD-740, MIL-STD-167, and MIL-S-901
  • Lightweight and extremely compact
  • High reliability – MTBF exceeds 100,000 hours
  • O.V., O.L. and O.T. protected
  • Modular Design with MTTR below 30 minutes
  • Advanced SNMP Communication included
  • Tight voltage and frequency regulation
  • PC Boards are conformal coated



Nova’s Lightweight Galaxy-Series DC-AC Inverters are high-reliability power sources specifically designed for demanding applications in high shock, vibration, humidity, and EMI environments in compliance to MIL-STD-461, MIL-S-901, MIL-STD-167, MIL-STD-810, MIL-STD-740, and DOD-STD-1399. These models utilize field-proven technology, offering maximum reliability for severe environment and high reliability applications such as:

  • Military Applications: Including Submarine, HMMWV, UAV, Shipboard, Aircraft, Mobile Power Units, Shelters, Transportable Systems, Tactical Systems, Ground Support, and more.
  • Heavy-Duty Industrial Applications
  • Demanding Commercial Applications
  • Communications Systems




  • Input Voltage: 270 VDC Nominal, 180-355 VDC Operating Range (other ranges available)
  • Output Voltage: 120, 208, or 230 VAC (specify)
  • Frequency: 50 / 60 / 400 Hz. Available
  • Voltage Regulation: ± 2% NL to FL
  • Frequency Regulation: ± 0.5% NL to FL
  • Harmonic Distortion: 5% THD, 3% typical
  • Input Power Factor: 0.95 or Better @ half-full load
  • Efficiency at full load: 85% @ full load typical
  • Connections: MS Connector (mates opt.)
  • Overload, Thermal, Input Undervoltage, and Input Overvoltage Protected
  • AC Output Circuit Breaker, and Audible Alarm with Silence Switch
  • Operating Temperature: -20° to +55°C (Extended ranges optional)
  • Storage temperature range: -40° to +71°C (Extended ranges optional)
  • Humidity: to 95% RH non-condensing – Designed to meet MIL-STD-810 optionally. All boards conformal coated with Acrylic MIL-I-46058 Type R.
  • Elevation: 15,000 Ft. (4,572m) operating;
    40,000 ft. (12,192m) non-operating
  • Shock: 20g, 11 mS half sinewave – Designed to meet MIL-STD-810
  • Audible Noise: Less than 55 dbA at 5 ft.
  • MTBF: 100,000+ hours per field data @ +25C Ambient Ground-Fixed
  • MTTR: 30 minutes by qualified personnel
  • SNMP V1.0 via CAT-5 Connector
  • Major Alarm: Logic Fault, Overtemperature, Overload
  • Minor Alarm: Utility Off
  • RS 232 (Available-Optional) Via DB 9 Connector
  • Alarm Contacts(Available-Optional)
  • Status (Red / Green)
  • Inverter Off (Red)
  • Logic Fault (Red)
  • Over Temperature (Red)
  • Load on Utility (Red) Optional with transfer switch
  • Audible alarm with front panel mounted silence switch


  • Ruggedization against high shock, vibration and humidity
  • MS Connector Mates
  • Chassis Slide Guides
  • Internal Transfer Switch
  • High IP Protection for front / rear panels (typically IP32,) including louvers on all intake and exhaust, as well as fully gasketed breakers, switches, and indicators.
  • Bulkhead / Floor Mount Cabinet
  • Custom Markings
  • Environmental Stress Screening Services



MIL-STD-740-1: Airborne Sound Measurements for Shipboard Equipment

MIL-STD-740-2: Structureborne Vibratory Acceleration Measurements

Additional Ruggedization to meet MIL-S-901, MIL-STD-167, MIL-STD-810, and DOD-STD-1399: The 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.

MIL-S-901D for Grade A, Class II, Type B Equipment (mounted in shock-isolated rack attenuating to 20g/11ms max)

MIL-STD-167-1 for Type I Equipment


· Air Temperature per MIL-STD-810F Method 502.4, Procedure II
· Steady State Temperature per MIL-STD-810F, Method 501.4, Procedure I (Constant Temperature) and Method 502.4, Procedure I
· Temperature Shock per MIL-STD-810F, Method 503.4, Procedure II, Cyclic.
· Thermal Shock testing per MIL-STD-810G, Method 503.5, Procedure I-D
· Operating Temperature Shock per MIL-STD-810B Method 503 0 to 71°C
· High Temperature Storage per MIL-STD-810G, Method 501.5, Procedure I
· Low Temperature Storage testing per MIL-STD-810G, Method 502.5, Procedure I
· High Temperature Operating per MIL-STD-810G, Method 501.5, Procedure II
· Low Temperature Operating per MIL-STD-810G, Method 502.5, Procedure II
· Operational Humidity per MIL-STD-810F Method 507.4.
· Humidity per MIL-STD-801G, Method 507.5, Procedure I
· Storage and Transportation Humidity per MIL-STD-810F, Method 507.4
· Salt Fog Atmosphere per MIL-STD-810F Method 509.4
· Altitude per MIL-STD-810F, Method 500.4, Procedure I, Storage/Air Transport.
· Operating and Non-Operating Altitude Testing per MIL-STD-810G, Method 500.5, Procedure II
· Rapid Decompression per MIL-STD-810F, Method 500.4, Procedure III
· Transit Shock per MIL-STD-810F, Method 516, Procedures IV, V and VI
· Transportation Vibration per MIL-STD-810F, Method 514.5, Procedure II for loose cargo transportation
· Transportation Vibration per MIL-STD-810G, Method 514-6, Procedure I, Category 20
· Vibration per MIL-STD-810B Method 514.6, Category 12, Procedure I
· Transit Drop per MIL-STD-810F, Method 516.5, Procedure IV
· Transit Drop per MIL-STD-810G, Method 516.6, Procedure IV
· Bench Handling per MIL-STD-810F, Method 516.5, Procedure VI
· Bench Handling per MIL-STD-810G, Method 516.6, Procedure VI

DOD-STD-1399 Section 301A Table V – Design Limits for Ship Motion

Internal EMI Reduction Package to meet MIL-STD-461: The design of this unit is specifically focused on reducing EMI emissions. The UPS contains substantial internal filtering to minimize EMI emissions. Inputs which may be susceptible to transients are protected by several methods. The compact rack mount chassis 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. Paint method via ANSI-61 gray is designed to assure excellent bonding of mating sheet metal parts. All input and output ventilation filters include metal honeycomb-style or mesh filters.

MIL-STD-461E: CE101, CE102, CS101, CS114, CS116, RE102, RS101, and RS103.

OPTIONAL Compliance to RTCA/DO-160G:

  • Rapid Decompression: Section 4 Cabin Pressure (8K) to Max Operating Alt (35K) in 15 sec; Hold for 10 min
  • Crash Safety Sustained: Section 7, Cat B – Up = 3.0g – Down = 6.0g – Fwd = 9.0g – Aft = 1.5g – Side =4.0g
  • Explosive Atmosphere: Non-Ignition Test Sec. 9.6.2, Cat E
  • Humidity: Section 6, paragraph 6.3.1 (Category A)
  • Random Vibration Testing: Section 8 (Category R, Fixed-Wing), paragraph 8.7.2, Figure 8-1: Aircraft Type 2, Test Category S, Zone 2, Curve B
  • Operational Shock Testing: Section 7 (Category B), paragraph 7.2, Standard operational, Peak value 6 g, Nominal duration 11 ms.

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