Power Frequency Hipot Test Equipment AC Dielectric Strength Test System for High Voltage Equipment Preventive Test

The YDJ Series Power Frequency Withstand Voltage Test Device is a professional solution for dielectric and insulation testing of high-voltage electrical equipment. It is developed to apply controlled high voltage to test objects and assess their insulation strength under specified AC power-frequency or DC voltage conditions.

The system adopts a two-part configuration consisting of a high-voltage test transformer and a control cabinet/operating console. The two units can be selected and matched based on the required testing voltage and capacity, allowing the equipment to be configured for different project requirements.

Multiple versions of control cabinets/consoles are available to meet operation requirements of different working conditions:

1. Pointer‑type Control Cabinet
2. Digital Display Control Cabinet
3. Manual Operation Console
4. Electric Operation Console
5. Intelligent Operation Console
6. Industrial PC Operation Console

• Customers can select control modes: Manual, Electric, Full‑automatic.
• Printing function and computer interface can be added as required.
• Non‑standard customization is available for special requirements.

• Modular Equipment Architecture: The control console and high-voltage transformer are designed as independent modules, allowing flexible matching of voltage, capacity, and configuration.
• Broad Specification Range: Multiple specifications are available to accommodate different equipment ratings and withstand voltage testing requirements.
• Dual-Mode Withstand Testing: The system can perform both AC and DC withstand voltage tests, providing a practical solution for a variety of high-voltage applications.
• Expandable Voltage Capability: A single transformer can be used for standard tests, while series-connected units can be configured when higher test voltages are required.
• Selectable Operation System: Manual, electrically controlled, fully automatic, and industrial PC control solutions are available for different testing environments and automation requirements.
• Efficient Test Data Processing: Optional printer, USB interface, and PC communication functions facilitate real-time recording, data transmission, storage, and export.
• Customized Insulation Structure: Oil-immersed, epoxy resin dry-type, SF₆ gas-insulated, and corona-free designs are available for different insulation and operating conditions.
• Suitable for Multiple Applications: The flexible configuration makes the system suitable for high-voltage laboratories, manufacturing plants, substations, and field testing sites.

A Power Frequency Withstand Voltage Test Set is used to verify the electrical insulation strength of high-voltage equipment before it is placed into service or during routine maintenance. The system applies a controlled AC high voltage to the test object and checks whether its insulation can withstand the specified electrical stress without insulation failure.

The equipment can be used for withstand voltage testing of many types of electrical equipment, including power transformers, current transformers, voltage transformers, bushings, insulators, switchgear, circuit breakers, cables, and other high-voltage components. It is suitable for manufacturing plants, substations, power utilities, laboratories, and electrical testing organizations.

The test transformer should be selected according to several key factors, including the required test voltage, output capacity, test object, insulation level, and operating environment. Depending on the application, customers can choose from lightweight, dry-type, oil-immersed, gas-type, insulating-cylinder, and corona-free test transformers.

Yes. The control section can be configured according to the customer's preferred operating method and automation requirements. Options include conventional pointer-type control boxes, digital control panels, manual operating consoles, electric control systems, intelligent control systems, and industrial PC-based control systems.

Yes. The system can be designed for both laboratory and field applications. For mobile testing, lightweight test transformers and compact control systems can be selected to make transportation and installation easier. For fixed laboratory applications, higher-capacity configurations can be supplied to accommodate larger test objects and higher voltage requirements.