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Flywell Power UK Ltd is a manufacturer of portable ground power units for aviation.
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Continuous Power Supply (28 V)   Download as PDF
This unique range of 28 Volt portable GPUs has been developed to provide continuous DC power for avionics work, shop maintenance,diagnostics, training or demonstrations. It has one of the best powerto-weight ratios on the market.

For ease of service and maximum redundancy, these units are fitted with independent 53 Amp advanced Switch Mode Power Supplies, the number of which depends on the model.
Digital Voltmeter indicates output voltage.
Digital Ammeter indicates output current.
Output “ON” green LED indicate individual Power Supply.
Protection against overload (constant current limiting, unit will shut down output after 5 second, re-power on to recover).
Protected against over voltage (set at 31 V, unit will shut down output, re-power on to recover).
Protected against over temperature (95 C detect on heat sink of power transistor, unit will shut down output, recovers automatically after temperature goes down).
Cooling by a number of independent high-power cooling fans.
Supplied with 3 meter heavy-duty DC output cable and rubber Aircraft plug, AC input cord and workshop manual.



Can be supplied with longer heavy-duty DC output cable and rubber Aircraft plug.
Can be connected in parallel with other FW GPUs to increase current output or to be used for starting aircraft.
Technical Specifications *  
Technical Data FW 50 FW 100 FW 200 FW 300
Input Voltage 90 VAC to 264 VAC 1 phase (8A) 90 VAC to 264 VAC 1 phase (8A) 220VAC to 460 VAC 3 phase (16A per phase)
Input Voltage Frequency 40Hz to 70Hz
Output Voltage 28.2 VDC
Output Current Continuous 53A 106A 212A 318A
Output Current Peak 71.5A for 5 seconds 143A for 5 seconds 286A for 5 seconds 430A for 5 seconds
Efficiency 90%
Overall Dimensions in mm Not more than (L x H x W) 420 x 200 x 160 420 x 300 x 160 420 x 400 x 320
Operating Temperature -40°C to +70°C
Weight, not more than 7.5 Kg 11.5 Kg 20.5 Kg 26 Kg
Weather Resistance IP 54
Ripple & Noise (Max) 150 mV p-p
Load Regulation +/- 0.5%
Vibration 10 ~ 500Hz, 2G 10 min / 1 cycle, 60 min, each along X, Y, Z axes
Safety Standards UL60950-1, TUV EN60950-1 Approved
EMC Standards Compliance to EN55022 (CISP 22), EN61000-3-2,-3
Technical specifications are subject to change, due to new developments. We also do custom development of products as per your requirements. The actual equipment may look different from the one shown in the photograph.
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