RT-Backup
The RT-Backup is a rugged, lightweight, portable 28V DC power source and 28V DC voltage regulator.
Description
It can be used as a standalone 28V DC power supply for up to 30 minutes duration whilst powering a maximum of two Rotortuner products. It can also be used to maintain a 28V DC supply in the event of aircraft voltage fluctuations.
During aircraft operating and testing procedures, it is possible that the aircraft's 28V supply may fluctuate or become unavailable, particularly during engine tests. RT-Backup has been designed to automatically and seamlessly compensate for these aircraft voltage fluctuations to provide a stable and reliable power source by instantly switching to its internal batteries.
As a stand-alone 28V DC supply, RT-Backup can be used to power Rotortuners without the need to connect large ground power units or run from the aircraft batteries.
The RT-Backup incorporates lithium battery technology to achieve: a long in service life, excellent low-temperature performance, and a short recharging time.
The RT-Backup has a built-in charging circuitry operating from supply voltages of 12V DC to 29V DC. RT-Backup will automatically activate the charging circuit upon the availability of a suitable power supply such as the aircraft 28V DC or Rotortuner AC Adaptor Pn.007920. LED displays on the front panel indicate the charging status and remaining battery capacity.
The unit is designed to be operated either standing vertically or laying down on its rear surface. Rubber feet are provided for both mounting options along with twin mounting lugs to restrain the unit using 30mm web strapping.
Product Specification
| Part Number | 003086-2 |
| Power Supply | Mil 704C For 28V DC Operation |
| Input Current | Factory Configurable - limit set at 6A |
| Output Voltage | 28V DC |
| Capacity | 4.0Ah (@ 20°C) |
| Maximum Current | 3.6A |
| Maximum Pulse Current (5 Sec) | 4.3A |
| Maximum Power | 100W |
| Maximum Pulse Power (5 Sec) | 120W |
| Recharge Time at 20°C | 4.5 hrs approx (from 0% capacity, no external load) |
| Battery Life | 500 cycles at 100% discharge (to 70% of initial capacity) |
| Internal Charger | 3-stage fully automatic, operating from 11V DC - 32V DC supplies |
| EMC Certification | CE Emissions EN 55022 1998 |
| CE Immunity EN 50024 1998 | |
| RTCA DO 160E Sections 16 to 21 Cat B | |
| Vibration | RTCA DO 160E Section 8 |
| Operation Shocks and Crash Safety | RTCA DO 160E Section 7 |
| Transportation Certification | UN Manual of Tests and Criteria, Part III, Sub-Section 38.3 Lithium Batteries |
| International Air Transport Association (IATA) 2004 Dangerous Goods Regulations, 45th Edition | |
| Electrical Safety | Low Voltage Directive EN 61010-1:1993 + A2: 1995 |
| Case | Alloy |
| Finish | Powder-coated Black |
| Size | Height: 80mm Width: 240mm Depth: 240mm |
| Weight | 5 Kg |
| Operating Temperature | -20 to +55°C |
| Storage Temperature | -40 to +60°C, optimum long-term storage temperature 20°C |
Optimum Battery State of Charge for Storage: 50% of capacity
Note: 30 minutes power support based upon a single powered equipment. Thermal protection circuits prevent operation outside of specified range. Front panel LED indicator will illuminate to inform user.