1、 Product Overview:

The ultra-low frequency insulation withstand voltage test is actually an alternative method to the power frequency withstand voltage test. We know that when conducting power frequency withstand voltage tests on large generators, cables, and other test samples, large capacity test transformers or resonant transformers are required due to the large capacitance of their insulation layers. These huge devices are not only bulky and expensive, but also very inconvenient to use. In order to solve this contradiction, the power department has reduced the testing frequency and thus lowered the capacity of the testing power supply.

It has been proven through years of theory and practice both domestically and internationally that using a 0.1Hz ultra-low frequency withstand voltage test instead of a power frequency withstand voltage test can not only achieve the same equivalence, but also greatly reduce the size and weight of the equipment. Theoretically, the capacity is about one fifth of the power frequency, and the operation is simple, which has more advantages compared to power frequency testing. That's why developed countries generally adopt this method. The National Development and Reform Commission has formulated the industry standard for the ultra-low frequency (0.1Hz) withstand voltage test method of 35kV and below cross-linked polyethylene insulated power cables. Our country is promoting this method. This instrument was developed based on our country's needs. It can be widely used in AC voltage withstand tests for cables and large high-voltage rotating motors.

Product nickname: ultra-low frequency high voltage generator, 0.1Hz ultra-low frequency high voltage generator, programmable ultra-low frequency high voltage generator, ultra-low frequency AC high voltage test device, ultra-low frequency withstand voltage test device.

2、 Product features:

1. This product combines advanced modern digital frequency conversion technology and adopts microcomputer control for fully automated boosting, lowering, measurement, and protection.

2. Due to full electronicization, it has a small size, light weight, clear and intuitive large screen LCD display, and can display output waveforms and print test reports.

3. Simple wiring, large screen LCD display, convenient operation, and user-friendly human-computer interaction.

4. The current, voltage, and waveform data are all directly sampled from the high-voltage side, so the data is accurate.

5. It has overvoltage protection function. When the output exceeds the set voltage limit, the instrument will stop and the protection action time will be less than 10ms.

6. Equipped with overcurrent protection function: designed with high and low voltage dual protection, the high voltage side can be precisely shut down for protection according to the set value; When the current on the low voltage side exceeds the rated current, a shutdown protection action will be taken with a duration of less than 20ms.

7. The high-voltage output protection resistor is designed inside the boost body, so there is no need to connect another protection resistor externally.

Due to the use of high and low voltage closed-loop negative feedback control circuits, there is no capacitance rise effect in the output.

9. The small size and lightweight of the instrument are very conducive to outdoor operations.

The products developed and produced by Wuhan Hezhong Electric are strictly manufactured in accordance with international and national standards and industry regulations, and have passed the testing of national, provincial, and municipal power research institutes, measurement centers, and authoritative power departments. At the same time, Wuhan Hezhong Electric has fully passed ISO9001 international quality management system certification, the People's Republic of China manufacturing measuring instrument license, GB/T19001-2008 quality management system requirements, GB/T24001-2004 environmental management system requirements, and GB/T28001-2011 occupational health and safety management system requirements.

We will strictly follow the "Quality and After sales Service Commitment Letter" to implement relevant product services. We will continue to firmly believe that high-quality, systematic, comprehensive, and fast services are the foundation of enterprise development. After years of continuous exploration and progress, we have formed the service philosophy of 'customer centricity, quality as the first life of the enterprise'. And with the goal of creating a first-class service enterprise in China through strict quality management and advanced technology, we have formulated a quality policy of 'standardized management system, strict process control to ensure product quality and customer satisfaction'. For many years, we have adhered to the principle of 'customer first' and built a good sales and after-sales service system to provide customers with better pre-sales, in sales, and after-sales services!

Our after-sales service commitment is: 'Refund within 3 months, replacement within 1 year, free repair for 3 years, and lifelong maintenance'. In the days to come, we will continue to adhere to the three-star service as always!

Note: The detailed product information is subject to the actual product. Please confirm the specific model parameters with the sales personnel before purchasing. Please refer to the instruction manual.

The final interpretation of this service commitment belongs to Wuhan Hezhong Electrical Equipment Manufacturing Co., Ltd.

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