PowerGuard MIL-UPS-2K3 Mil-Spec Military UPS System — 2.3 kVA Online, 30 min Backup

PowerGuard MIL-UPS-2K3 is a military UPS system for naval platforms, shore systems and military electronic infrastructure, using a double-conversion online topology and producing a pure sine-wave output. It supplies critical military equipment — radar, communication equipment, computer systems, sensors and low power factor capacitive loads — with uninterrupted, clean and stable power.

In an online topology the load is always fed through the inverter, so input interruptions, voltage fluctuations and noise never reach it. When the supply fails completely, the VRLA gel battery pack takes over and provides 30 minutes of backup.

Input stage — AFE rectifier: The Active Front-End (AFE) rectifier architecture delivers high efficiency, low harmonic distortion and stable DC bus management across a 115 VAC ±20% input range. Sudden voltage changes, imbalances or harmonic faults on shore power are isolated at the AFE stage.

Output stage — PWM-controlled inverter: A high-frequency PWM-controlled inverter produces a constant 115 VAC pure sine wave whether the load is capacitive, has a low power factor or draws inrush current, so radar transceivers, modems and radio systems run unaffected by power fluctuations.

Battery and backup: VRLA gel (sealed, maintenance-free) battery, 30 minutes of backup, thermal management and battery protection algorithms, battery status on the OLED display.

Monitoring, control and safety:

• Dual OLED displays: Information display (voltage, current, frequency, battery) and warning / fault display (FAULT LIST)
• Remote monitoring: Monitoring and remote on/off over the Ethernet interface (KN6)
• BIT (Built-In Test)
• Guarded emergency stop, silenceable audible alarm, BY-PASS and RESET buttons
• Protection: Overcurrent, over/undervoltage, short circuit, overtemperature and battery protection

Standards and mechanical design:

The VRLA gel battery pack provides 30 minutes of backup at a 2 kW load; runtime at other loads is confirmed with the quotation.

• Naval and shore systems: Uninterrupted supply for mission-critical equipment
• Radar, sonar, electro-optical and communication systems
• Defence electronics control units and computer infrastructure
• Command and control centres and mission consoles
• Platforms with capacitive loads: Military systems with low power factor loads
• Mobile or fixed military power systems

MIL-UPS-2K3 was developed as a military UPS (uninterruptible power supply) for naval platforms and shore installations, and MIL-STD-1399 is listed in its datasheet together with MIL-STD-810G and MIL-STD-461F. Features that matter on board:

• Shore power disturbances: the AFE input isolates sudden voltage variations, imbalance and harmonic faults; input protection covers over-current, under-voltage, reverse phase sequence and harmonic distortion
• Supply format: 3-phase 115 VAC ±20%, 45–65 Hz input; 115 VAC 60 Hz (±0.1 Hz) pure-sine output
• Shipboard loads: stable operation on capacitive loads down to a 0.3 power factor, for radar transceivers, sonar, electro-optical and communication systems
• Enclosure: 5754 aluminium alloy with corrosion-resistant coating, six-point vibration isolators, military-type lug cable entries and forced-air cooling through guarded, filtered fans
• Maintenance and safety: manual bypass transfers the load without interruption; guarded emergency stop, silenceable alarm, BIT and Ethernet (KN6) monitoring

Commercial UPS units often become unstable on capacitive, low power factor loads. MIL-UPS-2K3 is designed to run stably on capacitive loads down to a 0.3 power factor, and its AFE input keeps shore power disturbances away from the load. Manual bypass keeps the load running during maintenance and testing.

For short-term on-vehicle backup after engine shutdown see the Supercapacitor Auxiliary Power Backup Unit; for isolated 115 VAC from a 400 VAC grid see the 400/115 VAC AC-AC Inverter.

Corporate assurance: TEDEG Defence is an approved supplier of ASELSAN, Roketsan and the Turkish Ministry of National Defence (MSB), with NATO supplier registration under NCAGE: TM885.

Production status: The images on this page show the pre-series validation unit.