28.5V aviation DC power supply

I. Overview
The DC28.5V aviation DC power supply adopts high-voltage mode PWM control box IPM high-frequency full bridge conversion technology, which uses inverter technology to convert 50Hz power frequency power supply into 28V DC power supply for civil and military aircraft start-up and on-board equipment power on inspection. The product adopts advanced SPWM inverter technology and intelligent control system, selects the most advanced and highly reliable industrial standard components, and adopts first-class production technology, making it have superior performance indicators and high reliability. Fixed and mobile models can be provided according to user requirements. Fast dynamic response, strong overcurrent capability, and low output ripple. It has the advantages of small size, light weight, low noise, high efficiency, and simple operation. The 28V aviation DC power supply is supplied through the ground well/terminal cabinet on the apron (hangar) to meet the electrical requirements for aircraft maintenance and repair. Widely used in power equipment for aerospace, ground radar stations, ships, submarines, computer stations, military precision instruments and imported equipment.


2、 Performance characteristics:
1. Adopting high-frequency PWM and IPM full bridge conversion technology, the efficiency is higher than 85%
2. Excellent output stability: source voltage ≤ 0.5%, load effect ≤ 0.5%
3. Output ripple less than or equal to 1%
4. Complete protection function, ensuring the normal operation of power equipment and the safety of loads
5. 10 turn voltage regulating potentiometer, voltage adjustable within the range of 18V to 32V
6. A 10 turn current regulating potentiometer can limit the output current value from 30% to 105% of the rated value in case of short circuit and overload
7. Current output range: 100A~2000A
8. LED voltage and current digital display, easy to start and stop operation.


3、 Applicable occasions
Aircraft and onboard equipment start-up and testing
Manufacturing, testing, and maintenance of military electronic equipment such as radar and navigation, as well as aircraft field inspection and maintenance
Aircraft simulation testing, aerospace, vehicle and ship special DC testing and power supply for national defense sites
All other occasions that require the use of DC power supply

4、 Execution standards
GJB181-86 Aircraft Power Supply Characteristics and Requirements for Electrical Equipment
GJB572-88 Aircraft Ground Power Supply Characteristics and General Requirements
QJ988-86 General Technical Conditions for Ground DC Power Supply
ISO6858 General Requirements for Aircraft Ground Support Power Supply
GJB 181A-2003 "Aircraft Power Supply Characteristics"
GJB 572-88 "Aircraft Ground Power Supply Characteristics and General Requirements"
MH/T 6018-1999 "Ground Static Power Supply"

5、 Technical parameters

input	Input Voltage	Three phase 380V ± 15%
	frequency	47-63HZ
output	external characteristics	Constant voltage CV
	rated output voltage	28.5V
	Output voltage range	0～35V
	output current	Choose from 0 to 2000A
	Current range	0~105% rated output current
	Maximum starting current	2400A
	source voltage effect	<±0.1%
	loading effect	<± 0.2% (resistive load)
	Effective value of full load ripple	<±0.5%
	high frequency noise	<±2%
	Load response time	1ms
	efficiency	>90% @ 100% load
display	Digital Voltmeter	(4 1/2) 规格: ±0.5%rdg+2digit
	digital ammeter	(4 1/2) 规格: ±0.5%rdg+2digit
working conditions	Storage temperature	-40℃~+60℃
	Operating Temperature	-20-46 ℃ (general military type) -25-55 ℃ (foreign trade type)
	relative humidity	≤ 95% (no condensation)
	Protection level	IP20
	atmospheric pressure	80-106KPc (altitude below 2000m)
	noise	< 65 dB at 1 meter
protect	Input phase loss protection	Model of three-phase input
	Overvoltage protection setting	3V to 110% rated maximum voltage, automatic protection and alarm in case of overvoltage
	Output overcurrent protection	If the current exceeds 850A, the power supply will automatically shut down after 5 seconds of operation and resume normal output after 10 seconds. It can continuously protect the self starting conversion.
	short circuit protection	The output terminal can be short circuited for a long time, and there will be sound and light alarms when the short circuit is resolved. After the short circuit is resolved, the power supply will automatically resume normal operation
	overheat protection	>Operated at 85 ℃, it can automatically restore output after the overheating is resolved
reliability		Mean time between failures: greater than 20000 hours
Insulation requirements	Dielectric Strength	Input shell AC2000V/1 minute, leakage current less than 10mA
		Input to output AC1500V/1 minute, leakage current less than 10mA
	insulation resistance	Input to shell, input to output: DC1000V, greater than 100M Ω
		Output to shell: DC500V, greater than 100M Ω
cooling system		Forced fan cooling
Lead voltage drop compensation		Equipped with automatic lead voltage drop compensation function
chassis	Three defense requirements	All components comply with national and military standards
	Requirements for impact and vibration	Compliant with national and military standards
	Dimensions (width x height x inner depth) mm	Depending on power
weight		Depending on power
Optional accessories		1. Aircraft Ground Connector (PJD-450HT)
		2.航空电缆 （10m,15m,20m）

6、 Model specifications

model	Specifications
NHZDY28-10	DC28V 10A
NHZDY28-30	DC28V 30A
NHZDY28-50	DC28V 50A
NHZDY28-100	DC28V 100A
NHZDY28-150	DC28V 150A
NHZDY28-200	DC28V 200A
NHZDY28-300	DC28V 300A
NHZDY28-500	DC28V 500A
NHZDY28-1000	DC28V 1000A
NHZDY28-1500	DC28V 1500A
NHZDY28-2000	DC28V 2000A