Working parameters:
Power supply: AC 220V±10% 50Hz±10%
Ambient temperature: 0-40℃
Relative humidity: ≤90%
Output voltage: 0-30KV, 0-50KV, 0-80KV
Output frequency: 0.1Hz, 0.05Hz, 0.02Hz
Load capacity: Max 1.1μF at 0.1Hz output, Max 2.2μF at 0.05Hz output, Max 5.5μF at 0.02Hz output
Voltmeter indication accuracy: ≤3%
Ammeter indication accuracy: ≤5%
Features:
The ultra-low frequency withstand voltage test device combines modern digital frequency conversion advanced technology, adopts microcomputer control, and the voltage boosting, voltage reducing, measurement, and protection are fully automated, and manual intervention can be carried out during the automatic voltage boosting process. Due to full electronization, it is small in size and light in weight, with a large-screen liquid crystal display, clear and intuitive, and can display the output waveform, and the printer outputs the test report. The design fully complies with the 4th part of the "General Technical Conditions for Special Test Instruments for Power Equipment": the "General Technical Conditions for Ultra-low Frequency High Voltage Generators" power industry standard, and it is very convenient to use. At present, both domestic and foreign countries use mechanical methods for modulation and demodulation to generate ultra-low frequency signals, so there are problems such as non-standard sine wave waveforms, large measurement errors, spark discharge in the high-voltage part, bulky equipment, and the second and fourth quadrants of the sine wave also require high-power high-voltage resistors for discharge shaping, so the overall power consumption of the equipment is relatively large.
The ultra-low frequency withstand voltage test device can overcome these shortcomings. In addition, the following features need special explanation:
The current, voltage, and waveform data are all directly sampled from the high-voltage side, so the data is true and accurate.
Overvoltage protection: When the output exceeds the set voltage limit, the instrument will stop for protection, and the action time is less than 20ms.
Overcurrent protection: Designed as dual protection for high and low voltage. The high-voltage side can perform precise shutdown protection according to the set value; when the current on the low-voltage side exceeds the rated current, shutdown protection will be performed, and the action time is less than 20ms.
The high-voltage output protection resistor is designed inside the voltage boosting body, so there is no need to connect an additional protection resistor outside.
Due to the adoption of high and low voltage closed-loop negative feedback control circuit, the output has no capacitive rise effect.
Technical conditions:
Rated output voltage: 0-30KV, 0-50KV, 0-80KV
Output frequency: 0.1Hz, 0.05Hz, 0.02Hz
Load capacity: Max 1.1μF at 0.1Hz, Max 2.2μF at 0.05Hz, Max 5.5μF at 0.02Hz
Measurement accuracy: 3%
Voltage positive and negative peak error: ≤3%
Voltage waveform distortion: ≤5%
Operating conditions: indoor and outdoor; Temperature: -10℃∽+40℃; Humidity: ≤85%RH
Power supply: AC 50Hz, 220V ±5%
