Common Questions and Answers about DC High Voltage Generator
Common questions about DC high voltage generators
Q1: Why does the green light not turn on after the power switch is turned on?
A1: There are two reasons for this phenomenon: one is a short circuit in the power cord, and the other is a blown fuse; the corresponding solution is to replace the power cord or the fuse.
Q2: During use of the DC high voltage generator, the red light turns off, the green light turns on, and the DC high voltage drops. What is the reason?
A2: When the above situation occurs during use of the DC high voltage generator, it indicates that a protective action has been triggered. At this point, the following steps should be taken:
① Return the voltage regulator potentiometer to zero.
② Turn off the power switch, and all panel indicator lights should be off.
③ After one minute, only when the internal low-voltage capacitor is fully discharged, can the power switch be turned on again. Perform a no-load test again, and after investigating the situation, the voltage can be raised again for testing.
Q3: When discharging large capacitance test samples, can a discharge rod be used directly?
A3: When discharging large capacitance test samples, the discharge rod should not be immediately brought into contact with the test sample. Instead, gradually bring the discharge rod closer to the test sample, and at a certain distance, it will begin to cause air ionization discharge accompanied by a "hissing" sound. After the sound stops, the discharge rod can be used for discharge, and then directly connect to the ground wire for discharge.
Q4: How to use the current limiting resistor?
A4: When conducting cable tests, connect one end of the current limiting resistor to the upper end of the voltage doubling cylinder, and then connect the other end of the current limiting resistor to the microammeter. Note that the current limiting resistor is only used when performing capacitive load tests (including cable tests), and it is not necessary for other tests!
Q5: If the DC high voltage generator is damaged during cable withstand voltage testing, what could be the reasons?
A5: There may be two reasons: one is improper operation, such as turning off the power directly without lowering the voltage, causing current backflow and burning out the generator; the other is that the current is too small and the voltage is raised too quickly, leading to instrument burnout.
Q6: Does the DC high voltage generator have automatic protection? What should be done if the instrument malfunctions?
A6: Since DC high voltage testing carries certain risks, special emphasis is placed on improving the product's automatic protection functions during R&D. Our products feature various protection functions such as overvoltage, overcurrent, return-to-zero, grounding protection, and unique disconnection protection. In abnormal working conditions, the automatic protection device will activate, stopping the voltage increase process and reducing the voltage back to zero. Our products have strong automatic protection, reliable protection mechanisms, and all technical indicators exceed industry standards, making them safer and more convenient to use.
Q7: Can the DC high voltage generator be used for underground mining operations?
A7: As long as the working environment conditions are met, it can be used. The environmental conditions are: temperature between -10 to 40°C, relative humidity not exceeding 85% at room temperature of 25°C (no condensation), and altitude below 1500 meters. Among them, the 40KV integrated machine is specially designed for convenient operation in underground mines.
Q8: At a voltage of 1000V, are the readings of the DC high voltage generator accurate?
A8: One of the advantages of our DC high voltage generator is its stable performance. When the voltage rises to 1000V, the readings on the voltmeter and ammeter of the control box are very stable, without fluctuations or drifting. This requirement far exceeds national standards!
Q9: Does the size of the DC high voltage generator affect safety performance? Is bigger better?
A9: Size is not a criterion for measuring instrument quality. We adopt scientific research achievements and, on the basis of ensuring product quality, produce such compact and portable instruments, which not only ensure product safety but also facilitate customer use, and are highly praised by users.
Q10: Can the DC high voltage generator be used as a power source?
A10: The working principle of the DC high voltage generator is to convert 220V AC into DC high voltage, and then use the DC high voltage for on-site testing. Therefore, it can also be called an instantaneous high voltage power source. It is important to note that the continuous working time of this high voltage should not exceed 30 minutes (national standard), as exceeding 30 minutes can cause significant damage to the instrument.
