Shanghai JAL Electric Co., Ltd. is a high-tech enterprise integrating the production and sales of R&D, electric power testing equipment, instruments and meters, and electric power industrial automation system. Especially in the research of DC high voltage generator, it has strong strength and won many patents for high voltage test. The RXZGF DC high-voltage generator products produced by our company are exported to domestic and foreign markets and have won a high reputation.
RXZGF DC high-voltage generator (DC high-voltage voltage source) is widely used in DC withstand voltage and leakage test of high-voltage electrical equipment, such as field test of lightning arrester, power cable, transformer winding and generator in power system. In addition, it is also widely used in security X-ray machines, medical instruments, ion accelerators and other fields.
RXZGF DC high-voltage generator is developed according to China industry standard ZBF24003-90 "General Technical Requirements for Portable DC High-voltage Generator", which is suitable for DC high-voltage test of zinc oxide arrester, magnetic blow arrester, power cable, generator, transformer, switch and other equipment in power departments, factories and mines, scientific research units, railways, chemical industry and power plants.
RX ZGF DC high-voltage generator can measure DC leakage current of transformer coil, power transformer coil, high-voltage power cable, high-voltage motor, high-voltage insulator, generator set and zinc oxide arrester.
Early DC high voltage generators generally used power frequency high voltage, and DC high voltage was obtained through rectification of high voltage silicon reactor. This method has been abandoned for a long time because of its large volume, poor stability and large ripple coefficient. Now it is only used in a few self-made laboratories with low precision requirements and some X-ray machines for security inspection.
RXZGF DC high voltage generator adopts intermediate frequency voltage doubling circuit, takes the lead in applying the latest PWM intermediate frequency pulse width modulation technology, adopts closed-loop regulation and large voltage feedback, which greatly improves the voltage stability. The high-power IGBT device with excellent performance and its driving technology are adopted, and special shielding, isolation and grounding measures are adopted according to the electromagnetic compatibility theory. The DC high voltage generator is of high quality and light weight, and can withstand rated voltage discharge without damage.
The main components of RXZGF DC high voltage generator are advanced technical components from the United States, Germany, Japan and other countries, which makes the instrument more reliable and stable. The voltage doubler has small volume, large capacity and strong overload capacity, which is convenient for field operation test. Our company regards quality and reputation as its life, constantly improves the level of science and technology, and develops high-quality products to meet the needs of users.
Based on the power frequency rectification technology, a power frequency double voltage rectifier high voltage generator is developed. Its characteristics are simple circuit, strong overload capacity and low failure rate. However, due to the power frequency voltage doubling, there is generally no closed-loop feedback, so the high voltage stability is poor and the relay control loop protection action is slow.
RXZGF product function
The utility model has the advantages of smaller volume, lighter weight, simple operation, complete functions and convenient field use.
High voltage output is stable and ripple coefficient is small.
Continuous direct short circuit discharge to ground
Both voltage and ammeter are displayed digitally, with voltage resolution of 0. 1kV and current resolution of 1uA. The voltmeter on the control box directly displays the voltage value added to the load sample without an external voltage regulator. The leakage current is measured at the high and low voltage ends, and the high voltage end is displayed by a circular shielded digital meter, which is not afraid of discharge shock and has good anti-interference performance, and is suitable for field use.
Full range smooth voltage regulation
Negative polarity output, zero start, continuous regulation, overvoltage, overcurrent, zero return, grounding protection, disconnection protection and other protection functions.
The function of 75% VDC- 1 mA is added, and the voltage and ammeter display 75% data without calculation.
Overvoltage setting function, the set voltage value can be displayed intuitively.
The voltage doubler has small volume, large capacity and strong overload capacity.
There are three built-in support feet at the bottom, which increases the stability of the voltage doubler. (For 200 kV)
The upper cover of the control box can be used as a windproof base and can be connected with the voltage doubler to enhance the stability of the voltage doubler.
RXZGF technical index
Voltage and current accuracy: the voltage and current resolution of digital display meter (1.0% reading two words) is 0. 1kV and 1uA.
Ripple coefficient: ≤ 0.5%
Voltage stability: random fluctuation, when the power supply voltage changes 10% ≤ 1%.
Overload capacity: the no-load voltage can exceed the rated voltage 10%, and the maximum charging current for ten minutes 1.5 times the rated current.
Power supply: single-phase AC 50hz 220v 10%.
Working mode: intermittent use. Up to 30 minutes of continuous time.
Working environment: temperature:-10 ~ 40℃, relative humidity: no more than 85% (no condensation) at room temperature 25℃, altitude: 1.5KM or less.
Capacitive load capacity: the capacitance of the product under test is infinite. It can be charged with 1.5 times the rated current.
Structural features: epoxy glass fiber reinforced plastic electrical insulation voltage doubler. Air insulation, no leakage.
Features of the operation box: high-precision 0.75UDC 1mA one-button (accuracy ≤ 1.0%), which is most suitable for zinc oxide arrester test.
Over-voltage protection adopts dial setting, which is clear at a glance.
The aluminum alloy box is placed in the chassis, and the whole machine can be lifted with one hand.
RXZGF operating instructions
● The display lights, switches and knobs on the control box are clearly marked. When reading this operating instruction, please refer to the component names on the control box panel.
● There is a seven-core socket on the side of the chassis of the high-voltage tower, which is used to connect the cable of the control box, and a copper terminal on the side of the chassis is used to connect the ground wire.
● The attached high-voltage shielded ammeter is a micro ammeter. The jack at the top of the ammeter is a wire jack for connecting the measured object and can also be used as a power switch. When not in use, please unplug it and turn off the power automatically. Please open the screwdriver on the upper cover when replacing the battery, and then tighten the cover with the screwdriver after replacement. When replacing the battery of the flat watch, please open the back cover.
1. Connect the grounding terminal on the panel of the control box with the grounding terminal of the high-voltage tower, and connect it with the field or laboratory grounding wire. In order to ensure the safety of you and the equipment, please check the grounding wire repeatedly to ensure that all components are well grounded.
Connect the control box and the high-voltage tower with the seven-core cable provided. Both ends of the cable are the same fast aviation plug. Note that when inserting, the notch on the side of the plug should be aligned with the rough part inside the socket and tightened clockwise. (Either end of the cable can be connected to the control box or high-voltage tower) Connect the power cord. The power supply is single AC 220V, and the power frequency is 50HZ.
2. Turn on the power switch. At this time, the power switch light (green) and the panel indicator light are on. Then the high voltage indicator (green) lights up. If the high-pressure buzzer is in the open position, it will beep to remind the operator to add high pressure. At this time, turn the high voltage output adjustment knob clockwise to increase the voltage. The voltmeter shows the voltage KV value on the load sample, and the ammeter shows the sum of the current flowing through the sample and all leakage currents, but does not include the current of the built-in high voltage divider. The current is UA value, and the unit is microampere.
If the power switch is turned on, the high-voltage display light (green) will not light up, and the "zero" light (red) in the fault display will light up, indicating that the high-voltage output adjustment button is not in the zero position. Please turn this button counterclockwise to "zero" and reset the fine-tuning voltage knob to zero. Some "zero" lights go out, and then adjust them clockwise to boost the pressure.
3. If voltage regulation protection within the rated output voltage range is not required, turn the overvoltage protection setting button clockwise to the maximum. At this time, when the output voltage exceeds the rated output voltage, it will automatically protect and cut off the high voltage. If voltage regulation protection is needed within the rated output voltage range, please step up the no-load voltage to the predetermined protection voltage according to the above steps, and then slowly turn the overvoltage protection setting knob counterclockwise to the voltage required for overvoltage protection action. "Overvoltage" indicator is on, keep the setting knob of overvoltage protection in this position, and turn off the power supply. When connecting the sample, the high voltage will be automatically cut off when the boost voltage exceeds the predetermined voltage in the future.
4. When faults such as overvoltage and overcurrent occur, the high voltage is automatically cut off, the high voltage display light (green) goes out, the buzzer stops ringing, and the corresponding fault indicator lights up, indicating that the sample is short-circuited. If you want to restart, turn the high-voltage output adjustment knob back to zero, and the fine-tuning knob is also at zero, then turn off the power switch, turn on the power switch, remove the protection and boost the voltage again.
● Shut down during normal operation. First, reset the high-voltage adjusting knob counterclockwise, then reset the fine-tuning voltage knob to zero, and finally turn off the power switch.
● The power switch is also used to protect the reset switch, so when the fault indicator light (except the zero indicator light) is on, turn off the power switch first, then turn on the power switch, remove the protection and boost the voltage again.
5. When the load is a large capacitive load, please reduce the boosting speed appropriately to avoid over-current protection caused by excessive charging current. After the test, turn the output voltage adjustment knob counterclockwise to zero. At this time, the voltmeter still shows the voltage value on the sample. Please wait for the sample to discharge below 20KV through the high-voltage tower, and then discharge with the grounding rod to ensure safety.
Matters needing attention
1. In order to ensure personal safety, repeatedly remind users to pay attention to the good grounding of the control box and the high-voltage tower, as well as the discharge of the sample and the high-voltage tower after shutdown.
2. Please do not block the upper and lower vent holes of the control box to prevent foreign objects from falling into the holes. If there is a fan in the control box, please always check whether the fan is running normally.
3. The insulation cylinder of the high-voltage tower is dirty, please wipe it with a dry cloth, and don't scrub it with organic solvents such as alcohol and gasoline. The surface of the insulating cylinder can be cleaned with detergent and dried before use. Please put it in an aluminum alloy box when transporting or not in use.
4. When replacing the safety tube, please replace the safety tube according to the amperage calibrated by the safety tube socket.
5. If the high-voltage shielded microammeter shows "low BAT", please replace the 9V battery to avoid measurement error, and turn off the power supply when not in use.
6. Don't open the control box and high-voltage tower without permission, which will affect the product warranty. The factory is not responsible for self-disassembly.
RX200KV
Output voltage: 0-300kV (negative), continuously adjustable.
Output current: 0-2mA
Stability: better than 1%
Accuracy of voltmeter: 65438 0%
Accuracy of ammeter: 1%
Ripple coefficient:
Function: zero start, overvoltage, overcurrent and disconnection protection.
Overvoltage setting, 75% voltage switch button
Incidental: 3? High-end ammeter
Internal insulation: vacuum oiling
Outer cylinder wall: annular groove.
High pressure tower:? 240x1200mm, 27kg
Control box: 400X2 10X320mm, 16kg.
Simple "troubleshooting"
1, when the power switch is turned on, the digital display on the control box is not bright.
Please check the power connection and all fuse tubes. If the fuse tube is damaged, please replace it with a new fuse tube according to the amperage marked next to the fuse holder.
2. If the power switch is turned on, the digital indicator light is on, and the high voltage indicator light (green) is off, so high voltage cannot be added.
(1) The fault display "Return to Zero" light is on.
If it does not return to zero, please turn the high-voltage output adjustment knob and the fine-tuning knob counterclockwise to return to zero until the "return to zero" light goes out, and then the high voltage can be added.
(2) There are two phenomena in the "other" lamp of fault display, 1, grounding protection, and 2, disconnection protection.
A. The grounding wire may not be properly connected, or the grounding wire may not be reliably grounded. Please connect a reliable grounding wire, turn off the power and restart.
B. It may be that the cable connecting the control box and the high-voltage tower is not connected properly. After connecting the cable, please turn off the power and restart it. Or when the welding heads at both ends of the cable are off-welded, please weld the welding heads at both ends of the cable, turn off the power supply and restart.
C. The threaded head in the control box may be soldered and disconnected. Please re-weld, turn off the power and restart.
3, everything is normal, but in the process of not rising to the rated output voltage protection action.
(1) Fault display "Over-current" light is on.
A. the sample is short-circuited, or the leakage current is too large.
B. When the load is a large capacitor, the voltage rises too fast. Turn off the power supply, restart, and reduce the speed of boosting.
(2) the fault display "overvoltage" light.
The setting knob of overvoltage protection is not set to the maximum position. Please turn clockwise to the maximum position, turn off the power and restart.
4. When the sample is short-circuited under high voltage, it is possible that all the fault display lights will be lit up due to the large short-circuit current, which is normal. Please troubleshoot the example and restart.
5. After troubleshooting the test sample, the fault indicator light is still on, and high voltage cannot be added.
The power switch is also a fault protection reset switch. Please turn off the power switch and restart it to increase the voltage.
6. If it is found that the number of voltmeter fluctuates greatly, please check whether the 7-pin shielding net head and the central shielding wire head of the aviation plug connecting the two ends of the cable are off-welded. If so, please weld them well.
● If the above methods cannot eliminate the fault, please contact the manufacturer.
RXZGF DC high voltage generator product package
1. One aluminum alloy box for the main engine of the high-voltage multiplier.
2. A control box
3. A power cord
4. A high-frequency output seven-core cable
5. Factory test report of products.
6. An output line
7. Product User Manual.
8. Product certificate and warranty card.
9.4 safety tubes
RXZGF DC high-voltage generator packaging: aluminum alloy packaging box
At present, the DC high voltage generator realized by pulse width modulation technology is widely used in power system. Generally, 10kHz~40kHz pulse width modulation intermediate frequency power supply is adopted, and DC high voltage is obtained through multistage voltage doubling rectification. This device has the characteristics of small volume, light weight, high control precision, high stability, low ripple coefficient and fast protection speed. In this way, DC high voltage with high stability can be obtained, and products with short-term stability of 0.02% have been produced (mainly used in measurement departments).
In order to make the equipment smaller and lighter, the DC high voltage generator with higher frequency (up to 100kHZ) technology has been studied, and it is believed that its prototype product will appear on the market soon.
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Shanghai JAL Electric Co., Ltd. is a professional high-tech enterprise dedicated to the research and development of DC high-voltage generators for many years. I believe that continuous innovation and updating of products in the field of DC high-voltage generators for many years will bring you more thoughtful service.
References:
www.shrxdq.com