120kV 5mA DC High Voltage Circuit Generator

Product Introduction

In accordance with the most recent Chinese power industry standard DL/T848.1-2004, "General Technical Conditions for DC High-Voltage Generators," the MEZGF series DC high-voltage tester is a new generation of portable DC high-voltage testing apparatus. It is primarily intended for use by power departments, industrial and mining companies, metallurgical plants, steelworks, and other businesses' power divisions for DC withstand voltage tests on high-voltage electrical equipment such as zinc oxide surge arresters, power cables, transformers, and generators.

Product Parameter (specification)

Integrated Unit
Rated Voltage : 120 kV	Rated Current : 5 mA
Rated Power : 600 W	Cabinet Weight: 4.5 kg
Multiplier of Voltage Weight (kg): 4.5	Height of Voltage Multiplier (mm): 500
Measurement of Voltage Accuracy	Digital Display ± (1.0% of reading ± 2 digits)
Measurement accuracy as of right now	digital display ± (1.0% of reading ±2 digits)
Ripple coefficient	≤1%
Voltage stability	Random variation: ≤1% when the mains voltage fluctuates by ±10%
Overload capacity	For ten minutes, the no-load voltage may be 10% higher than the rated voltage.
Maximum charging current	1.5 times rated current
Power supply	220V ±10% single-phase AC at 50Hz
Ten Operating mode	Use intermittently for a maximum of 30 minutes at a time.
Environment of operation	Temperature range: -10 to 40°C
At 25°C, the relative humidity is ≤85% (non-condensing).
Altitude	Below 1500 metres
Capability of capacitive load	Unrestricted test specimen capacitance
Charging at 1.5 times rated current permissible
Structural features	Epoxy fibreglass electrical insulation voltage multiplier cylinder, air-insulated with no leakage concerns
Features of the control panel	Zinc oxide arrester testing-optimized high-precision 0.75UDC1mA single-touch buttons (accuracy ≤1.0%). Switch settings for overvoltage protection provide a clear visual indication. Unit housed in aluminium alloy case with integrated voltage multiplier, enabling single-handed portability.

Product feature and application

● Uses high-frequency voltage-doubling circuitry with high-power IGBT devices and PWM pulse width modulation technology.

● Has a low ripple coefficient of less than 1% and high-voltage feedback for superior output voltage stability.

● Full-range smooth voltage control provides current error of ±1 digit, voltage/current error of 1% (reading ±0.2kV), stability of ≤1%, and fine adjustment precision of ≤0.5%.

● Zinc oxide arrester testing with 1% precision (±1% of reading) is made easier by a 75%UDC1mA function button and a potentiometer-based zero-start voltage increase.

● Improved materials make the multiplier lightweight and robust. Dip switches are used to set overvoltage protection, which provides a clear indicator with a ±1% inaccuracy. High electrical performance and moisture resistance are ensured by a unique insulating layer.

Prodection details

Power departments, industrial and mining enterprises, metallurgical facilities, steel mills, and other businesses' power divisions are primarily responsible for conducting DC withstand voltage tests on high-voltage electrical equipment, such as zinc oxide surge arresters, power lines, transformers, and generators.

Company Qualifications

FAQ

1)can dc voltage arc ?

Discharge of high-capacitance test specimens must be accomplished using a 100Ω/V discharge rod. During discharge, the rod cannot come into direct touch with the specimen. Rather, approach the specimen gradually until, at a defined distance, an audible hissing sound marks the onset of air gap ionization discharge. The rod can be utilized to commence the discharge once the sound ceases, and the complete discharge can be performed by connecting directly to the ground lead.

2)is high voltage dc harmful ?

The spatial electric field distribution of high-voltage DC ions may cause varying DC potentials across persons standing in close proximity at high-voltage DC levels of 200kV and above, even if test staff wear insulated footwear and stay beyond the safety distance. Test staff should refrain from shaking their hands or making contact with earthed surfaces because doing so could generate a small electric shock. This phenomenon is most noticeable in arid areas, particularly in the winter, even though the small amount of energy involved often poses minimal risk to people.

3)How much DC voltage is possible?

Hi, your product's voltage rating determines the maximum voltage that can be achieved. If you need more specifications than those listed, don't hesitate to ask.

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