ZGF-2000 Series DC High Voltage GeneratorDetailed product description：

The ZGF-2000 series is specifically designed to detect the electrical insulation strength and leakage current of power devices. The DC high voltage generator is a newly researched, designed, and manufactured product based on the requirements of the Chinese industry standard ZBF 24003-90 "General Technical Conditions for Portable DC High Voltage Generators". It is a new era product - the DC high voltage generator. It is suitable for conducting DC high voltage tests on equipment such as zinc oxide lightning arresters, magnetic blow lightning arresters, power cables, generators, transformers, switches, etc. in power departments, factories and mines, scientific research units, railways, chemical industries, power plants, etc. It is the most ideal replacement product in the new century.

Technical Features
1. Adopt high-frequency voltage doubling circuit, apply PWM pulse width modulation technology and high-power IGBT devices.
2. Adopting voltage negative feedback, the output voltage stability is high, and the ripple coefficient is small ≤ 1%.
3. Full range smooth voltage regulation, fine voltage regulation accuracy ≤ 0.5%, stability ≤ 1%, voltage and current error 1% (reading ± 0.2kV), current error ± 1 word.
4. The boost potentiometer boosts the voltage from zero.
5.75% UDC1mA function button, convenient for testing zinc oxide lightning arrester, with an accuracy of 1% reading ± 1%.
6. The overvoltage protection adopts a dip code setting, which is clear at a glance with an error of ± 1%.
7. The double pressure adopts new materials, which are lightweight and sturdy. The exterior is coated with special insulation material, which has good electrical performance and strong moisture resistance.
8. Foldable support foot, large diameter area, good stability performance.
9. Integrated design, high-voltage grounding cable lead out, convenient for on-site testing.
10. The product meets the technical requirements of DL/T848.1-2004 and has undergone type testing by the Electrical Equipment Quality Inspection and Testing Center of the Ministry of Electric Power, strictly adhering to the enterprise standard before leaving the factory.

Characteristics and parameters

Output voltage and current	60kV/2mA	60kV/10mA	120kV/2mA	120kV/5mA	200kV/2mA	200kV/5mA	300kV/2mA
Control box weight	4.5kg	4.5kg	4.5kg	4.5kg	4.5kg	4.5kg	4.5kg
Size and weight of the pressure multiplier	Φ120×300mm 4.1kg	Φ148×360mm 4.5kg	Φ120×450mm 5.5kg	Φ148×500mm 6.2kg	Φ148×730mm 11kg	Φ148×760mm 11.5kg	Φ180×1100mm 20kg
working power supply	50Hz；220V±10%
measurement error	Digital voltmeter: 1% (full degree) ± 1 word; Digital ammeter: 1% (full scale) ± 1 word
Stability	Random fluctuations, when the power supply changes by ± 10%, ≤ 0.5%
Ripple coefficient	≤ 0.5% (full degree)
working method	Intermittent use, rated load for 60 minutes
working environment	Environmental temperature: -15 ℃ to 50 ℃; Relative humidity:<90% (no condensation); Altitude: ＜ 2500m

characteristic
① Small in size, light in weight, beautiful, reliable, easy to operate, and fully functional.
② Adopting the most advanced technology and manufacturing processes. Pulse train logic array modulation, using high-power IGBT devices and phase fuzzy control, resulting in higher output stability, smaller ripple, and a frequency of up to 100KHZ.
③ Designed for maintenance free use, it is durable and not afraid of continuous short circuit discharge to ground.
④ High precision and accurate measurement, the output voltage regulation adopts a single multi turn potentiometer, the boosting process is smooth, the adjustment accuracy is high, and there are coarse and fine adjustment functions. The instrument has a high and low voltage end for measuring leakage current, and a spherical shielded digital meter for displaying the high voltage end, which is not afraid of discharge shock. Good anti-interference performance, suitable for on-site use.
⑤ 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 or current limiting resistor during use. The wiring is simple and the operation is convenient.
⑥ Negative polarity output, zero start, continuously adjustable, with various protection functions such as overvoltage, overcurrent, return to zero, grounding protection, and disconnection protection. Strong automatic protection function, safe operation, and various technical indicators are superior to industry standards and similar products.
⑦ With 75% functionality, measuring zinc oxide lightning arresters brings great convenience. There is a 75% voltage switch function on the control box of this instrument. When the current rises to 1000uA, the 75% button will be turned on, and the values displayed on the voltmeter and ammeter will be 75% of the data. After completion, the boost knob should be immediately returned to the zero position, and the fine adjustment voltage knob should be returned to the zero position. And immediately turn 75% of the ammonium button switch to the normal position before conducting other tests.

Simple troubleshooting
1. When the power switch is turned on, the digital display on the control box does not light up
Please check the power connection and all fuses. If the fuse is damaged, please replace it with a new one according to the amperage indicated next to the fuse seat.
2. If the power switch is turned on, the digital display will light up, the high voltage display light (green) will not light up, and high voltage cannot be applied.
① The fault display shows that the "return to zero" light is on but has not returned to the zero position. Please turn the high voltage output adjustment knob and fine adjustment knob counterclockwise to return to the zero position until the "return to zero" light is off, in order to apply high voltage. ② There are two phenomena when the fault display "Other" light is on: 1. Grounding protection, 2. Disconnecting protection
a. Perhaps the grounding wire is not properly connected or the grounding wire is unreliable. Please connect a reliable ground wire, turn off the power, and restart.
b. It is possible that the cable connecting the control box and the high-voltage tower is not properly connected. Please turn off the power and restart after connecting the cable. When the welding joints at both ends of the cable come loose, this fault may occur. Please weld the welding joints at both ends of the cable, turn off the power, and restart.
C. It is possible that a wire end inside the control box has detached and disconnected. Please re weld it, turn off the power, and restart.
3. The DC high-voltage generator is functioning normally, but it is protected during the process of not reaching the rated output voltage
① The fault display "overcurrent" light is on
a. Short circuit or excessive leakage current of the test sample.
b. When there is a large capacitive load, the boost is too fast. Turn off the power, restart, and slow down the boost speed.
② The fault display shows that the "overvoltage" light is on. The overvoltage protection setting knob is not set to the maximum position. Please rotate it clockwise to the maximum position, turn off the power, and restart.
4. When a short circuit occurs under high voltage of the test sample, due to the large short-circuit current, it is possible to turn on all the fault display lights, which is normal. Please troubleshoot the test sample and restart. 5. After troubleshooting the sample, the fault display light still lights up and high voltage cannot be applied.
The power switch also serves as a fault protection reset switch. Please turn off the power switch and restart it to boost the voltage.
6. If you notice significant fluctuations in the voltmeter readings, please check if the 7-pin shielded mesh head and center shielded wire head of the aviation plug at both ends of the connecting cable have come loose or disconnected. If they are disconnected, please weld them properly.