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HGZGF Series DC High-Voltage Generator

I. Safety Warning

Personnel operating DC high-voltage testers must be certified professionals holding a "High-Voltage Testing Qualification Certificate."
When using this instrument, users must comply with Article 168 of the "Electric Power Safety Regulations" and install two clearly identifiable disconnect points before connecting the working power supply to the tester. When replacing test samples or wiring, both power disconnect points must be clearly disconnected first.
Prior to the test, verify that the grounding wires of the tester control box, voltage multiplier cylinder, and test specimen are properly connected. The grounding wire of the test circuit shall be connected to a single point as specified in this manual.
For large-capacity test specimens, discharge should be performed using a 100 Ω/V discharge resistor rod. During discharge, the rod must not contact the specimen immediately; instead, it should be gradually moved toward the specimen until a certain distance is reached where air discharge begins with a hissing sound. Once no sound is heard, discharge may proceed using the rod, followed by direct grounding for final discharge.
When the DC high voltage reaches 200 kV or higher, even though test personnel wear insulating shoes and operate at a safe distance, the spatial electric field distribution of high-voltage DC ions can cause adjacent standing personnel to carry different DC potentials. Personnel must avoid shaking hands or touching grounded surfaces, as this may result in mild electric shocks—particularly noticeable in dry regions and during winter—but such shocks are generally harmless due to their low energy level.
After completing the test, the grounding wire must be connected to the high-voltage output terminal before removing the high-voltage lead.
A reliable grounding must be ensured during use. The high-voltage lead-out cable must not be held in hand for safety reasons.

II. Introduction

The HGZGF series DC high-voltage tester is a new-generation portable DC high-voltage tester designed and manufactured in accordance with the latest China power industry standard DL/T848.1-2004 "General Technical Requirements for DC High-Voltage Generators." It is primarily suitable for power departments, industrial and mining enterprises, metallurgical plants, steel mills, and other corporate power units to conduct DC withstand voltage tests on high-voltage electrical equipment such as zinc oxide surge arresters, power cables, transformers, and generators.

III. Key Technical Parameter Characteristics

1. Technical Features:

Features a high-frequency voltage multiplication circuit, employing PWM (Pulse Width Modulation) technology and high-power IGBT devices.
Features high-voltage feedback for excellent output voltage stability with a ripple coefficient of ≤1%.
Smooth voltage regulation across the entire range with excellent precision: adjustment accuracy ≤0.5%, stability ≤1%, voltage current error 1% (reading ±0.2 kV), current error ±1 digit.
The voltage booster potentiometer starts from zero voltage boost.
A 75% UDC1mA function button facilitates zinc oxide surge arrester testing, with a reading accuracy of ±1% within 1% tolerance.
The overvoltage protection employs a pull-tab setting, offering clear visibility with an accuracy of ±1%.
The voltage doubling component is constructed from advanced materials, featuring lightweight and robust construction. Its exterior is coated with specialized insulating materials, ensuring excellent electrical performance and superior moisture resistance.
Foldable footrest with large diameter and surface area for excellent stability.
Integrated ZGF design with high-voltage floor-cleaning cable termination for convenient on-site testing.
ZGF products comply with the technical requirements of DL/T848.1-2004 and have passed type testing conducted by the Electrical Equipment Quality Inspection and Testing Center of the Ministry of Electric Power, meeting all enterprise standards upon factory release.

2. Technical Specifications: 2.1 specifications technical parameter

specifications technical parameter	60/2	60/3	60/5	60/10	100/2	120/2	120/5	200/2	200/3	200/10	300/2
rated voltage (KV)	60	60	60	60	100	120	120	200	200	200	300
rated current (mA)	2	3	5	10	2	2	5	2	3	10	2
power rating (W)	120	180	300	600	200	240	600	400	600	2000	600
Case weight (kg)	2	2	4.5	5.5	3	3	4.5	4.5	4.5	4.5	5.5
Double-pressure weight (kg)	2.5	3	3.8	4.2	4	4	4.5	7.9	8.3	10	11
Double pressure height (mm)	400	400	500	500	500	500	500	965	965	1030	1250

2.2 specifications technical parameter

specifications technical parameter	300/5	300/10	300/20	400/2	400/5	400/10	400/20	500/5	Other Grades
rated voltage (KV)	300	300	300	400	400	400	500	500	Custom-made for 500–1000 KV systems
rated current (mA)	5	10	20	2	5	10	20	5
power rating (W)	1500	3000	3000	800	800	800	10000	10000
Case weight (kg)	5.5	5.5	6.5	5.5	5.5	5.5	11.5	12.5
Double-pressure weight (kg)	11.5	11.5	11.5	38	38	38	85	90
Double pressure height (mm)	1250	1250	1250	1900	1900	1900	1900	2200

Common Technical Parameters:

Voltage measurement accuracy: Digital display ±(1.0% reading ±2 digits)
Current measurement accuracy: Digital display ±(1.0% reading ±2 digits)
ripple coefficient: ≤1%
voltage stability: Random fluctuations: when the power supply voltage varies by ±10%, the change is ≤1%.
overload capacity: The no-load voltage may exceed the rated voltage by 10% for a period of ten minutes. The maximum charging current is 1.5 times the rated current.
source: Single-phase AC 50Hz 220V ±10%
operate mode: intermittent service The maximum duration for a single continuous session is 30 minutes.
work environment: temperature :-10～40℃ Relative humidity: No more than 85% at room temperature of 25°C (without condensation). Altitude: below 1,500 meters
charged capacitance load carrying capacity: The capacitance of the test sample is unlimited. Can be charged at 1.5 times the rated current.
design feature: Epoxy fiberglass reinforced plastic electrical insulation double-voltage cylinder Air insulation eliminates concerns about leakage.
Characteristics of the Control Panel: The high-precision 0.75UDC1mA single-touch button (accuracy ≤1.0%) is best suited for zinc oxide arrester testing. The overvoltage protection is configured in a clear and intuitive manner. Place an aluminum alloy enclosure at twice the voltage level of the main unit, allowing the entire system to be carried in one hand. The control box is compact, making it convenient for on-site use.

Note: Due to continuous product updates, the actual sample shall prevail. The company reserves the right to interpret the terms.

IV. Product Completeness

Control Box: 1 unit
High-pressure voltage multiplier cylinder (1 unit or 2 units)
One copy of the User Manual
One copy of the Product Inspection Certificate
One copy of the Factory Acceptance Test Report
Several spare fuses
1 power cord
One high-frequency output cable
One dedicated grounding wire for the discharge rod
Discharge rod: 1 piece
Current-limiting resistor: 1 unit (the lightweight version includes an internal voltage multiplier)
Microampmeter: One set of dedicated test shielding cables and clips for microampmeters

V. Quality Assurance

All instruments and equipment provided by our company fully meet the buyer's requirements, and we offer complimentary pre-sales technical services.
Our company's products undergo rigorous inspection and control during production, with manufacturing and shipment strictly compliant with the ISO 9001 quality management system.
All product qualities of our company comply with our corporate standards and relevant national standards.

VI. Service Commitment

The provided products come with a one-year free warranty and lifetime repair service, with 24/7 customer support available.
A 24-hour response to user inquiries or factory return for resolution, among other measures.

HGZGF Series DC High-Voltage Generator

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Categories	AC/DC Withstand Power Supply
Currentrange:	0-100mA
Weight:	10kg
Dimensions:	400mm x 300mm x 200mm
Price:	$2,500 – $38,000
Place of Origin:	WUHAN HUBEI CHINA
Currentaccuracy:	±1%
Packaging Details:	Pallet packaging is suitable for long-distance transportation by container.
Frequencyrange:	50Hz/60Hz
Powerconsumption:	≤500VA
MOQ:	ONE
Inputvoltage:	220V/110V AC
Protectionfeatures:	Overvoltage, Overcurrent, Short Circuit
Productcategory:	AC/DC Voltage Withstand Test Power Supply
Delivery Time:	5-8 work days
Compliancestandards:	IEC, UL, CE
Storagetemperature:	-20°C to 60°C
Operatingtemperature:	-10°C to 40°C
Brand Name:	Huagao
Displaytype:	Digital LCD
Model Number:	HGZGF
Payment Terms:	L/C,D/A,D/P
Voltageaccuracy:	±1%
Supply Ability:	FIVE units (sets) are supplied per week.
Outputtype:	AC and DC