Product Name: DC regulated power supply

Product model: dcks21-2850e
1、 Introduction
This series of products are dc28v DC power supply specially designed and manufactured for aviation and military electronic and electrical equipment with high frequency power electronic conversion technology, which can be used for aircraft and airborne equipment, aerospace, navigation, etc
Military electronic equipment and other occasions requiring 28V DC power supply. This series of products meet the national military standard gjb181 - aircraft power supply characteristics and requirements for electrical equipment, gjb572 - aircraft ground power supply
Power supply characteristics and general requirements are the replacement products of DC unit and SCR rectifier power supply.

2、 Applicable places
It is mainly suitable for aircraft and airborne equipment, aircraft and equipment and other 28V power supply requirements. It can be used for DC power supply and Simulation of aircraft start-up power supply, ground equipment maintenance, test, production inspection, etc
Test occasion. The main users are scientific research institute, army, military factory, civil aviation company, aviation material maintenance company and other customer groups.

1. IGBT high frequency switching control technology is adopted to make the regulated power supply have good output performance and system stability;

2. IGBT high frequency static conversion, small volume, light weight, low noise, high efficiency;

3. It can be used alone or installed with 19 "standard cabinet;

4. Standardized module design makes the maintenance of power supply simple and fast.

1. Input



Input voltage range: 115V ± 10%; 220V ± 10%



Input frequency range: 400 Hz ± 10 Hz; 50Hz ± 5 Hz



2. Output



Rated voltage: DC 28V



Rated current: 50A



Voltage regulation range: 1V ~ 34V



Adjustment resolution: potentiometer continuous adjustment



Source adjustment rate: ≤± 0.5% FS



Load adjustment rate: ≤± 1% FS



Overall efficiency: ＞ 85%



Ripple content: 100mV (RMS)



Dynamic characteristics: overshoot and recovery time characteristics meet the requirements of gjb572



3. General requirements



Working temperature: - 25 ～ 50 ℃



Storage temperature: - 40 ～ 55 ℃



Humidity: ≤ 90%



Altitude: ≤ 2000m



Cooling mode: forced air cooling



Noise: 65dB



Protection class: IP20



4. Protection function



4.1 output overvoltage protection:



When the output voltage exceeds 10% of the upper limit value of the regulation range, the over-voltage protection circuit is protected immediately and the power output is turned off.



4.2 internal overheating protection:



During the operation of the power supply, when the radiator temperature of the power module exceeds 85 ℃, the overheating circuit acts immediately and turns off the power output.



4.3 input over and under voltage protection:



During the operation of the power supply, when the voltage fluctuation range of the power grid exceeds ± 15% of the allowable fluctuation range of the power supply, the input overvoltage and undervoltage circuit will act immediately and turn off the power output.