Programmable constant current power supply

1、 Product Introduction:

The high-precision DC constant current source adopts PWM high-frequency switching power supply ZVZCS soft switching conversion working principle internally, and adopts imported IGBT modules. The adjustable DC constant current power supply has specific characteristics such as high efficiency, high precision, and high stability, optimized for the high efficiency of linear power supplies and silicon rectifier power supplies. The product is more energy-saving and efficient, mainly used in scientific research institutions, laboratories, and electronic production lines that require precision power testing. The current value of the DC constant current power supply can be continuously adjusted from zero to the rated value, and the protection point can be freely selected and limited within the rated range. Simultaneously display open circuit voltage and current on LED digital display. Long term short circuit is allowed in the working state of this machine.

2、 Main features:

1. Display: Output voltage and current LED display (LCD display can be added according to customer requirements)
2. Appearance: Adopting desktop, tower or 19 inch standardized sizes, it can be combined and placed on various workbenches and racks;
3. Advantages: Small size, light weight, energy-saving and efficient
4. Constant voltage and constant current: Automatic switching of CC/CV constant voltage and constant current output, continuous linear adjustment of voltage and current values;
5. Protection functions: overvoltage protection, overcurrent protection, overtemperature protection, undervoltage protection, overload protection;
6. Short circuit characteristics: Long term short circuit under the working state of the machine;
7. External compensation: This machine can choose external compensation to reduce the voltage drop caused by a long output circuit;
8. Overvoltage and overcurrent protection value: The output overvoltage and overcurrent protection value can be adjusted. After protection, the output is cut off and locked, and it can be restored after restarting;
9. Communication function: Optional RS485/RS232 communication data interface, connected to computer data for control, or connected to PLC. (Optional)
10. Remote control function: Optional PLC analog signals such as 0-5V, 0-10V, or 4-20mA can be used to control the output voltage and current of the power supply; (Optional)
Optional 5V level power on/off function
10. Sampling function: Optional output voltage and current 0-5V, 0-10V, or 4-20mA analog voltage signal sampling; (Optional)
11. Timer function: optional timer on/off function, timed operation, or cyclic permission; (Optional)
3、 Product application:

◆ DC air switch ◆ DC contactor
◆ Mechanical switches, electronic switches ◆ DC transformers
◆ Thermal relays, molded case circuit breakers, small circuit breakers, and those that require setting rated current, operating current, short-circuit protection current, etc
◆ Automated testing and calibration platform ◆ Current requirement testing site
◆ Sensor ◆ Instrument accuracy calibration
Heating of new components such as resistance heating
4、 Technical parameters

capacity		500W-500KW
input	phase number	Single phase or three-phase (above 10KW is three-phase)
	Input Voltage	AC220V/380V±15%
	frequency	47-63HZ
	power factor	> 0.9
	inrush current	None, soft start
output	external characteristics	Constant voltage CV&constant current CC
	voltage range	(0V - rated V) continuously adjustable
	Stable flow range	(0A rated A) continuously adjustable
	efficiency	>90% (standard AC input, full load)
	Source effect	±0.2%
	loading effect	＜±0.5%
	Load transient recovery time	＜20mS
	voltage regulation accuracy	≤±0.5%
	current accuracy	≤± 0.5% (reading+range)
	ripple	<0.5% (full load)
	overcurrent	Maximum current cutoff, maximum power control.
display	Digital Voltmeter	4-digit LED display specification: ± 0.5% rdg+2-digit resolution: 0.01V
	digital ammeter	4-digit LED display specification: ± 0.5% rdg+2-digit resolution: 1A
working conditions	Storage temperature	-15℃~+50℃
	Operating Temperature	-10℃～+40℃
	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, input overvoltage protection, input undervoltage protection, output overvoltage protection, output overcurrent protection, short circuit protection, overheating protection
Insulation requirements	Dielectric Strength	Input AC2500V/1 minute for the chassis, leakage current 10mA
		Input to output AC 3000V/1 minute, leakage current 10mA
		Output to chassis AC3000V/1 minute, leakage current 10mA
	insulation resistance	Input shell: DC1000V, greater than 20M Ω
		Input to output: DC1000V, greater than 20M Ω
		Output to shell: DC1000V, greater than 20M Ω
cooling system		Forced fan cooling
chassis		19 inch standard cabinet
communication interface		RS232/RS485/signal dry contacts provide corresponding communication protocols
ANALOG		Analog interfaces for constant voltage control, constant current control, and constant power control