ZGF DC Hipot Tester
Введение в продукт
The ZGF DC Hipot Tester is a specialized high-voltage generating equipment designed for on-site testing in the power equipment field. It features reliable protection functions, including overvoltage, overcurrent, and zero-closing protection, and provides accurate 0.75 times output voltage indication for precise measurement and control.
Technical characteristics and advantages of DC high-voltage generator
Stable output: using high-frequency voltage doubling circuit or intermediate frequency inverter technology, with small voltage fluctuations and high testing accuracy.
Protection function: Equipped with overvoltage, overcurrent, zero start, grounding protection, etc., to ensure safe operation.
Portability and Integration: The miniaturized design facilitates on-site use, and some models integrate control, measurement, and protection functions into one.
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Technical Parameters
| Технические характеристики | 200/2 | 200/3 | 200/5 | 300/2 | 300/3 | 300/5 | 400/2 | 400/3 | 400/5 |
| Rated voltage（kV） | 200 | 200 | 200 | 300 | 300 | 300 | 400 | 400 | 400 |
| Rated current（mA） | 2 | 3 | 5 | 2 | 3 | 5 | 2 | 3 | 5 |
| rated power（W） | 400 | 600 | 1000 | 600 | 900 | 1500 | 800 | 1200 | 2000 |
| Control box quality（kg） | 5.5 | 6.0 | 6.5 | 10.5 | 10.5 | 10.5 | 10.5 | 10.5 | 10.8 |
| Pressure cylinder quality（kg） | 8.7 | 9 | 9 | 24 | 24 | 24.5 | 33.5 | 33.5 | 33.5 |
| Double cylinder height（mm） | 970 | 970 | 970 | 1250 | 1250 | 1250 | 1650 | 1650 | 1650 |
| Точность напряжения | ±(1,0%Чтение + 2 слова) | ||||||||
| Текущая точность | ±(1,0%Чтение + 2 слова) | ||||||||
| Коэффициент пульсации | ≤0.5% | ||||||||
| Стабильность напряжения | При изменении напряжения источника питания на ±10%≤1% | ||||||||
| Возможность перегрузки | Напряжение холостого хода может превышать 10 % от номинального напряжения в течение 10 минут. | ||||||||
| Максимальный зарядный ток в 1,25 раза превышает номинальный ток. | |||||||||
| источник питания | Однофазная связь 50 Гц 220 В ± 10 % | ||||||||
| Способ работы | Периодическое использование: номинальная нагрузка 30 минут. | ||||||||
| Использование напряжения в 1,1 раза больше номинального: 10 минут | |||||||||
| Способ работы | temperature：-10℃～+40℃ | ||||||||
| Relative humidity: no more than 85% at room temperature of 25 °C (no condensation) | |||||||||
| Высота: ниже 1500 метров. | |||||||||
| С емкостной нагрузкой | Тестируемый продукт имеет неограниченную емкость | ||||||||
| Заряжается током, в 1,5 раза превышающим номинальный. | |||||||||
| Конструктивные особенности | Electrical insulation doubler | ||||||||
| Воздушная изоляция, отсутствие утечек | |||||||||
| Особенности операционной коробки | Высокоточная кнопка в одно касание 0,75UDC1 мА (точность ≤1,0%), подходящая для испытания грозозащитного разрядника на основе оксида цинка. | ||||||||
| Защита от перенапряжения с помощью цифрового переключателя, краткий обзор | |||||||||
| Портативное шасси, более удобное на месте | |||||||||
Область применения
1. Conductivity current test of valve type lightning arrester.
2. DC withstand voltage test and leakage current measurement of power transformers.
3. Испытание выдерживаемого напряжения постоянного тока и измерение тока утечки высоковольтных кабелей (35-500 кВ и ниже).
4. U1mA DC reference voltage test and 0.75U1mA leakage current test for zinc oxide lightning arrester.
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Core application scenarios
1、 Insulation performance testing of power equipment
1. Voltage withstand test of high-voltage electrical equipment
Transformer: Test the insulation strength of the winding to ground and between layers to ensure that there is no risk of breakdown during long-term operation at rated voltage.
Switchgear: Detect the insulation reliability of components such as contacts and insulators under high voltage, and prevent partial discharge or breakdown accidents.
Transformer: Verify the electrical performance of insulation materials in high voltage environments, ensuring measurement accuracy and equipment safety.
2. DC reference voltage test for lightning arrester. Measure the leakage current of lightning arrester under DC voltage, evaluate its nonlinear resistance characteristics, and ensure the normal overvoltage protection function.
2、 Cable and accessory testing
1. DC withstand voltage test for power cables. Detect the voltage resistance of the main insulation of the cable (such as cross-linked polyethylene) under high DC voltage, and discover manufacturing defects or aging damage.
2. Performance verification of cable accessories. Test the insulation performance of cable terminals and intermediate joints to ensure that there is no partial discharge or breakdown at the joint location under high voltage.
3、 Testing of Insulation Materials and Components
1. Inspection of high-voltage components such as insulators and bushings. Apply high DC voltage, measure leakage current, evaluate surface hydrophobicity, pollution tolerance, and internal defects of insulators.
2. Dielectric loss test of capacitors. By measuring the capacitance and dielectric loss tangent (tan δ) under high DC voltage, the degree of dielectric aging of capacitors can be determined.
4、 Special industry applications
1. Detection of electrified railway contact network. Test the voltage resistance performance of components such as contact line insulators and section insulators to ensure the safety of train power supply.
2. Testing of new energy equipment. Used for insulation performance verification of photovoltaic inverters, wind power converters and other equipment to ensure their reliability in complex power grid environments.
Frequently Asked Questions
