• Isolation switches for input, output and battery
• Draw-out sub-assemblies and printed wiring boards
• Built-in test (BIT) capability
• On-line maintenance of batteries and battery charger
• Output voltmeter
• LED status indication for input, output, back-up mode operation, low battery, over current, over temperature and unit shutdown
• Fault signal for remote indication
• Circular coupling connectors for input and output
• Secondary fuse protection for output

DRS Pivotal Power's DC uninterruptible power supply (UPS) produces precise 28 VDC output power to comply with the stringent system requirements of STANAG 1008 specification for critical naval shipboard applications. In the event of loss of input power, the UPS is capable of supplying the rated output power for 15 minutes minimum, using internal batteries, with no transient interruptions.

The power conversion of the UPS is based on switch mode technology using high-frequency pulse-width modulation (PWM) which provides DC output voltage regulation with low transients.  The use of power MOSFETs as switching elements ensures high conversion efficiency.

The construction of the UPS is modular with draw-out type subassemblies for ease of maintenance.  The system reliability is an order of magnitude greater than other static conversion equipment due to the use of high reliability components and stringent quality screening standards.

The UPS was developed and fully qualified for military applications.