Power frequency high-voltage generator

ZGF2000 seriesDC high voltage generatorSuitable for conducting DC high voltage tests on zinc oxide lightning arresters, magnetic blow lightning arresters, power cables, generators, transformers, switches and other equipment in the power sector, power plants, research institutions, railways, chemical industry, power plants, etc. It is a new generation product in the new century.

Power frequency high-voltage generatorFeatures:

1. Small in size, lightweight, more aesthetically pleasing, reliable, easy to operate, fully functional, and convenient for outdoor use, it is a reliable product of the new century...

2. By adopting technology and process manufacturing, the PWM high-frequency pulse width modulation technology and pulse train logic array modulation are applied. High power IGBT devices are used to increase the frequency using high-frequency technology, reaching up to 100kHz, resulting in higher output high voltage stability and smaller ripple coefficient.

3. High precision and accurate measurement. Voltage and current are both displayed digitally, with a voltage resolution of 0.1kv and a current resolution of 0.1uA. The voltmeter on the control box directly displays the voltage value applied to the load test sample, without the need for an external voltage divider during use, and the wiring is simple. It has high and low voltage end measurement of leakage current, and the high voltage end is displayed with a circular digital meter, which is not afraid of discharge impact and has good anti-interference performance, suitable for on-site use...

4. The voltage regulation has high stability and smooth voltage regulation across the entire range. The output voltage regulation adopts an imported single multi turn potentiometer, which ensures a smooth boosting process and high adjustment accuracy. It is also designed with coarse and fine adjustment functions. The voltage regulation is better than 0.1%, the measurement error of voltage and current is less than 1.0%, and the pulsation factor is better than 0.5%.

5. Negative polarity output, zero start, continuously adjustable, with various protection functions such as overvoltage, overcurrent, return to zero, grounding protection, and * disconnection protection. The automatic protection circuit has strong functions, reliable protection, and ensures safe operation. All technical indicators are superior to industry standards and superior to similar products.

6. The addition of high-precision 75% VDC-1mA function brings convenience to the measurement of zinc oxide lightning arresters. A gentle press does not require calculation. There is a 75% voltage function key on the control box of this instrument. When conducting the zinc oxide test of the lightning arrester, when the current rises to 1000uA, the 0.75 button is turned on. At this time, the values displayed on the voltmeter and ammeter are 75% of the data. After completion, the voltage boosting knob should be immediately returned to the zero position. At the same time, the fine adjustment voltage knob should be returned to the zero position, and the green button should be immediately pressed to cut off the high voltage and turn off the power switch. Conduct other experiments.

7. The convenient overvoltage setting function adopts a digital dial switch, which can intuitively display the set voltage value, making your operation more flexible. The displayed value is in kV.

8. The double pressure cylinder can be divided into sections for on-site use, which is flexible and convenient. It can be used for multiple purposes and is economical.

Power frequency high-voltage generatorFault phenomenon inspection and handling:

Cannot start (1) whether the power is plugged in properly (2) whether the voltage regulating knob is reset to zero (3) whether the ground wire is connected properly (4) whether the fuse is blown

Automatically protected immediately after startup

(1) Is there a short circuit in the load

(2) Check if the overvoltage and overcurrent protection threshold is set to zero

(3) Unplug the five core cable plug, connect the grounding wire of the control box casing, and then separately power on the control box to start. If the startup is normal, it is a fault in the high-voltage generator; otherwise, it is a fault in the control box

High voltage index KV

Open the side panel of the control box when there is an error in the meter. The DC high voltage generator repeatedly adjusts the two blue rectangular shunt adjustable resistors in the control board. At the same time, calibrate with a standard high voltage meter or a precision ammeter connected to the local voltage measurement socket. If the accuracy still cannot be adjusted and the error is large (>1.5%), it is a mechanical failure of the meter head. Please return the control box to the unit for repair.

No high voltage output

(1) If the high voltage meter indicates but the load does not have high voltage, it is due to poor contact of a certain plug-in point in the high voltage circuit. The contact point needs to be reconnected after the voltage indication reaches zero after shutdown.

(2) The high-voltage meter has an indication but the load has a high-voltage output (with current indication or corona discharge phenomenon). If it is a malfunction of the high voltage indicator or a disconnection of the measurement circuit.

(3) Unplug the five core plug and ground the control box casing to test the boost. If there is an invalid AC output of 0-220 at pin 1.2 of the cable socket, and no output, it is a control box fault. If there is an output, it is a generator failure.

Spherical high-pressure flowmeter

The DC high-voltage generator is not working properly and is unstable. The 9V battery voltage inside the spherical meter is too low and needs to be replaced. (Method: Unscrew the screw of the metal ball of the meter that covers the socket and remove the upper cover to replace the battery.)

The spherical voltage current meter has a large error

(1) The three core plug of the high-voltage outgoing cable has poor contact with the socket.

(2) The 9V battery inside the ball is dead, replace the battery (method as above).

Precautions

The high-voltage testing work must strictly comply with the relevant provisions of the safety work regulations issued by the Ministry of Energy.

When opening the box, check for any transportation damage or poor contact.

After a period of use, it is necessary to check whether all electrical components are in good condition, especially the contact of the voltage regulator carbon brush.

Strictly follow the procedure for operation.

The layout of experimental equipment should have sufficient safety distance around people. Try to avoid placing equipment and applying high voltage leads in personnel corridors as much as possible.

Install fences and hang "Stop, High Voltage Danger" signs at the test site.

High voltage leads in the experiment should have supporting or traction insulation materials. There should be a safety supervisor to prevent anyone from approaching or passing underneath.

Power frequency withstand voltage test: Please pay attention to verifying whether the equipment capacity is sufficient and avoid resonance.

The working ground wire (high voltage tail, stabilizing capacitor terminal ground wire) and the protective ground wire (operating box shell) should be connected separately and have good grounding performance.

If there is irregular swinging of the power supply during the experiment (such as welding), it will inevitably affect the stability of the high-voltage output. At this time, the experiment should be stopped to find out the cause and eliminate it.

5. The requirements for climate (temperature, humidity) in the experimental work should comply with the requirements of the experimental regulations and be recorded.