Power Frequency Hipot Test Equipment AC Dielectric Withstand Tester for Power Transformer And HV Switchgear Testing

The YDJ Power Frequency Withstand Voltage Test Device is engineered for insulation withstand verification where controlled high-voltage stress is required. By generating the specified test voltage, the system enables users to check the dielectric performance of electrical equipment and insulating materials before commissioning or during periodic maintenance.

The complete testing system integrates a control section and a voltage boosting section. The control section is available in the form of a control cabinet or operating console, while the boosting section uses a dedicated test transformer. This configuration enables flexible system matching for different voltage levels, capacities, and testing conditions.

The YDJ series can be deployed across a variety of applications, including high-voltage equipment maintenance, electrical equipment commissioning, factory testing, preventive testing, and scientific research. It is commonly applicable to power transformers, HV switchgear, cables, arresters, insulators, bushings, and other high-voltage components.

Combining compact equipment construction, convenient transportation, easy servicing, stable operation, and safety-oriented control, the YDJ series is suitable for both fixed testing facilities and on-site high-voltage test operations. It provides a practical choice for power utilities, substations, power generation companies, industrial plants, railway systems, and professional electrical testing organizations.

• Flexible System Combination: The control unit and high-voltage boosting transformer can be configured independently and combined according to the required test voltage, capacity, and application.
• Optimized Compact Design: A streamlined structure makes the test set easier to install, transport, and operate, while maximizing practical use of available space.
• AC/DC Withstand Voltage Testing: Supports AC and DC high-voltage withstand tests, providing a versatile solution for electrical equipment insulation verification.
• Expandable for Higher Voltages: A single boosting unit can handle conventional testing tasks, while multiple units can be connected in cascade for higher-voltage applications.
• Adaptable Control Architecture: Manual, electric, automatic, and industrial PC control modes are available, allowing users to select the operating method best suited to their testing workflow.
• Integrated Test Data Management: Optional printing, USB communication, and PC-based interfaces support test-result recording, digital storage, transfer, and further data processing.
• Multiple Transformer Insulation Designs: Available with oil-immersed, epoxy resin dry-type, SF₆ gas-insulated, or corona-free structures to meet different environmental and insulation requirements.
• Suitable for Laboratory and Field Applications: The configurable design enables use across power utilities, substations, electrical equipment manufacturers, testing laboratories, and maintenance sites.

• Power System Acceptance Testing: Used during installation, commissioning and hand-over of equipment in substations, power distribution facilities and utility networks.
• Insulation Strength Verification: Helps verify the dielectric withstand capability of transformers, high-voltage switchgear, instrument transformers, cables, surge arresters and other HV equipment.
• Manufacturing Quality Assurance: Suitable for factory testing and type testing of high-voltage electrical components, insulation materials and finished electrical products.
• Preventive Maintenance: Supports periodic insulation assessment of HV equipment installed in power plants, railways, mines, metallurgical facilities and other industrial sites.
• Laboratory & Engineering Research: Provides a high-voltage AC testing solution for universities, electrical laboratories and R&D institutions conducting insulation performance studies and related experiments.

1. What is an AC Power Frequency Withstand Voltage Test Set?

   An AC Power Frequency Withstand Voltage Test Set is designed to evaluate the insulation strength of electrical equipment by applying a specified high AC voltage at power frequency. It is commonly used as an insulation verification tool during manufacturing, commissioning, acceptance, and maintenance testing. The system typically combines a voltage control unit with a high-voltage test transformer.

2. Which equipment can be tested with a Power Frequency Hipot Test Set?

   The system can be used for high-voltage insulation testing of transformers, CTs, VTs, bushings, insulators, switchgear, circuit breakers, power cables, and other electrical apparatus. It can support testing requirements in power utilities, substations, electrical manufacturing plants, testing laboratories, research facilities, and field service projects.

3. How many types of test transformers can be supplied?

   Different test transformer constructions are available to accommodate various voltage levels, capacities, and installation conditions. Depending on the application, the system can be equipped with ultra-lightweight, dry-type, oil-immersed, gas-insulated, insulating-cylinder, or corona-free test transformers. The transformer type can be selected according to the customer's test specifications.

4. What control unit options are available?

   The control section can be selected according to the required operating method and degree of automation. Available configurations include analog pointer control boxes, digital display control boxes, manual operating consoles, electrically operated consoles, intelligent control systems, and industrial computer-based control systems. The control unit can be matched with the corresponding test transformer to form a complete testing solution.

5. Can the equipment be configured for different working environments?

   Yes. The test set can be configured for laboratory, factory, commissioning, and on-site maintenance applications. For mobile projects, compact and lightweight components can be selected to simplify transportation and setup. For fixed testing facilities, higher-capacity configurations can be designed to meet demanding high-voltage test requirements.

6. Can the system be customized according to the test voltage and capacity?

   Yes. The test set is not limited to one standard configuration. The rated test voltage, transformer capacity, control mode, transformer structure, and overall system configuration can be selected according to the customer's test object and technical requirements. This makes it suitable for both standard testing applications and customized high-voltage testing projects.