Do you know the main characteristics of DC power supply?
1. Specification range: Output voltage 0-700V, output current 0-500A, output power 0-6KW, optional
2. Constant voltage and constant current: The voltage and current values can be continuously adjusted from zero to the rated value, and the constant voltage and constant current automatically switch
3. Overcurrent alarm: The alarm current value is 0-120% of the rated value, and the bearing can be continuously adjusted. When the power output current exceeds the current alarm value, an audible and visual alarm will be triggered
4. Overvoltage protection: The voltage protection value is continuously adjustable from 0 to 120% of the rated value. When the output voltage of the power supply exceeds the voltage protection value, it will trip for protection
5. Short circuit protection: allows for long-term short circuit or short circuit startup in any working state
6. Overload protection: When the power supply or load fails and the output current exceeds 1.5 times the rated value, the power supply trips for protection
7. Short circuit alarm: When the output voltage is below 1% of the rated value, the power supply will sound and light an alarm
8. Automatic discharge: for shutdown discharge of capacitive loads
9. Output display: Simultaneously display voltage and current on LED digital tubes
10. Pulse operation: can be equipped with a time controller to form a DC pulse power supply
11. Intelligence: It can be connected to a computer to form an intelligent power supply controlled by the computer
The main performance testing precautions and testing methods are as follows:
1) When measuring, the cumulative effect of all other influencing factors should be kept less than 1/10 of the specified value of the measured effect.
2) The load is a variable influence variable, and when the load is continuously adjustable, it should be carried out at the minimum and maximum values (when the minimum value is zero, it is specified to be carried out at 10% of the maximum value). Main measurement methods for DC power supply
3) A four terminal circuit should be used to separate the current terminal and the measurement terminal to reduce measurement errors.
4) When the power supply provides the measuring terminal, it should be carried out on the measuring terminal, and the digital voltmeter test head should be inserted into the center hole of the terminal post
to the end.
5) When measuring a steady current power supply, a sampling resistor R M should be used to ensure that the voltage drop on it is proportional to the current and should be less than the error of the measured effect
The difference limit is 1/10, and the error caused by it should be considered in the error analysis. At the same time, the sampling resistor R M should use a four terminal circuit
Separate the current end from the measuring end to reduce measurement errors.
