This series power supply adopts the technology of the high frequency power electronic conversion. It's a 28V DC power supply which is particularly designed and manufactured for the aviation and military electronic equipments. It can be used in the aircraft onboard equipments, aerospace, navigation, and other military electronic equipments, etc., and also the fields requiring the DC 28V power supply. This series power supply confirms to the requirements of GJB, “GJB181- Requirements for the aircraft power supply features and the electric equipments” and “GJB572- The aircraft ground power supply features and general requirements", it's the substitute of the DC generator and the silicon-controlled rectifier power supply.

Main Features

1. Adopt the IGBT high-frequency switch conversion and the closed-loop controlling technique of waveform, to make the regulated power supply with the good output performance and system stability.
2. The IGBT with high frequency static transformation, small volume, light weight, low noise and high efficiency.
3. With standardized design, the inverter maintenance is much simpler and quicker.

Product Parameter

1) Input: 

Input Voltage Range: 115V/200V±15%

                               220V/380V±15%

Input Frequency Range: 400Hz±10Hz

                                   50Hz±5Hz

2) Output:

Rated Voltage: DC 28V

Rated Current: 500A

Voltage Regulating Range:1V～34V

Adjusting Resolution: 0.1V～1V

Source Regulation: ≤±0.5%FS

Load Regulation: ≤±1%FS

Machine Efficiency: ＞85％

Ripple Content: 100mV（rms）

Dynamic Characteristics: Overshoot and the recovery time features meet the requiements of GJB572.

3) Comprehensive Requirements:

Operating Temperature: -25～50℃

Storage Temperature: -40～55℃

Humidity： ≤90%

Altitude: ≤2000m

Cooling: forced cooling

Noise: 65db

Protection Grade: IP20

①Output Over-voltage Protection: When the output voltage exceeds 10% upper limit of adjusting range, the over voltage protection circuit will protect immediately and shut off the power output.

②Internal Overheating Protection: During the power supply operation, when the temperature of the power module radiator exceed 85℃, overheating circuit will act immediately and shut off the power output.

③ Input Overvoltage and Under-voltage Protection:

During the power supply operation, when the power supply voltage fluctuation range exceed ±15% of the power supply allowed fluctuation range, the input under voltage circuit will act immediately and shut off the power output.