Power Frequency Hipot Test Equipment AC Withstand Voltage Test Device AC Dielectric Withstand Tester for Cable Switchgear GIS Insulation Testing

The YDJ Series is a versatile high-voltage test system developed for insulation withstand voltage testing under AC power-frequency and DC high-voltage conditions. It combines a dedicated control unit with a test transformer to provide a complete and practical solution for high-voltage test operations.

The control cabinet/console and boosting transformer are independently configured, allowing users to select a suitable system according to the required test voltage, capacity, and application. This flexible structure makes the equipment adaptable to different high-voltage testing environments.

With a focus on operational safety, equipment stability, easy servicing, and mobility, the YDJ series is particularly suitable for power maintenance departments, substations, power plants, electrical equipment manufacturers, metallurgical facilities, railway systems, and scientific research laboratories.

The system can be used to verify the insulation performance of various high-voltage electrical apparatus, components, and insulating materials, helping identify insulation defects before equipment is placed into service. Its compact design and convenient transportation make it suitable for both laboratory testing and on-site field applications.

• Adaptable to Different Test Setups: Modular control and boosting units can be matched freely, providing a flexible solution for various voltage levels and testing applications.
• Optimized Engineering Design: A rational and space-saving structure simplifies equipment arrangement, transportation, and operation.
• One System, Multiple Test Functions: Designed for both AC and DC withstand voltage testing, combining portability with practical field-test flexibility.
• Higher Voltage Through Cascade Connection: The system can work as a standalone unit or connect several boosting units in cascade when higher test voltages are required.
• Control Modes for Different Users: Choose from manual, electric, automatic, or industrial computer-based control to suit laboratory technicians and field operators.
• Digital Test Record Management: Optional printer, USB port, and computer interface support test-result storage, data transmission, and report generation.
• Designed for Diverse Insulation Conditions: Oil-immersed, dry-type epoxy, SF₆-insulated, and corona-free versions are available to meet laboratory, factory, and field-site testing needs.

• Power Grid & Substation Acceptance: Supports insulation withstand testing during equipment installation, commissioning, hand-over and scheduled preventive maintenance in substations and power distribution systems.
• High-Voltage Electrical Equipment: Applicable to dielectric strength verification of switchgears, transformers, CTs/PTs, surge arresters, cables, bushings and other high-voltage apparatus.
• Electrical Product Manufacturing: Used by manufacturers for factory inspection, routine testing and type testing of HV components, insulation systems and insulating materials.
• Industrial & Transportation Systems: Suitable for maintenance and insulation diagnostics of HV electrical installations used in railways, power generation, mining, metallurgy and other heavy industries.
• Laboratory & Academic Research: Meets the testing needs of universities, R&D centers and electrical laboratories for high-voltage insulation experiments, material evaluation and related research.