The insulation oil dielectric strength tester is a core detection equipment used in the fields of power, petrochemicals, and equipment manufacturing to assess the electrical insulation performance of insulation oil. The equipment relies on the measurement of the breakdown voltage of the insulation oil to accurately determine whether the oil has been affected by moisture intrusion, impurity contamination, or natural aging, thereby providing professional technical support for the smooth and safe operation of various high-voltage electrical equipment. Application scope
This detection equipment has a wide range of applicable industries. The main application fields are as follows:
Power-related fields: In power stations and scenarios related to power transmission and distribution operation and maintenance, it is often used as a routine inspection and preventive test equipment to monitor the quality changes of the internal insulating oil of in-use electrical equipment in real time.
Petrochemical fields: In scenarios related to oil refining and chemical production, this equipment is used to control the quality of insulating oil products and ensure that the produced oil meets the established technical specifications of the industry.
Electrical equipment manufacturing fields: In the production and manufacturing process of various oil-filled high-voltage electrical equipment, it is used for factory quality verification to check whether the various performance parameters of the built-in insulating oil of the equipment meet the standards.
Research and quality inspection fields: In various research laboratories, professional quality inspection institutions, and industry regulatory departments, it can be used for basic research on insulating oil characteristics, the development of new insulating materials, and quality arbitration testing, etc. Typical application scenarios
During actual operation, this equipment is mainly used for the detection of insulating oil in various oil-filled high-voltage electrical equipment:
Power transformers: They are the main application objects for detection. The dielectric strength of the insulating oil inside the transformers directly affects the overall insulation safety of the equipment. Regular detection can effectively avoid flashover faults inside the equipment.
Oil circuit breakers: This type of equipment relies on insulating oil for arc extinguishing. The quality of the insulating oil directly determines the short-circuit current breaking capacity of the equipment. Based on the detection results, the timing for filtering and replacing the insulating oil can be determined.
Oil-filled cables: They are mostly used for the detection of various cable joints. Through the changes in the performance of the insulating oil, the sealing status of the cables and the aging degree of the insulating material can be judged.
Power capacitors and oil bushings: For closed high-voltage capacitors and oil-paper insulated bushings, detection is carried out to promptly identify problems with oil deterioration and prevent insulation breakdown accidents at the source.
Core test standards and procedures
The insulation oil dielectric strength detection work should be strictly carried out in accordance with national, industry and common international standards to ensure the accuracy and uniformity of the detection data. Commonly used specifications are classified as follows:
Test method standards
The national standard “Insulating Oil – Breakdown Voltage Measurement Method” is the core execution basis for this detection work, clearly defining the entire operation process such as sample pre-treatment, test equipment cleaning, electrode assembly, voltage increase speed, and breakdown result determination. The normal voltage increase speed is 2.0 kV/s ± 10%, and the normal test is carried out continuously for six times, with the average value taken as the final detection data.
Special regulations for oil quality testing related to the power industry, based on the common national standard, combine the actual operation scenarios of the power industry to refine and improve the on-site practical operation procedures and detection requirements.
Equipment technical standards
General industry standards related to the general technology of high-voltage detection equipment, specifically regulating the production standards of insulating oil dielectric strength testers, factory verification methods, environmental requirements for use, and overall performance parameters. The current effective version uniformly standardizes the overall structure and performance of the equipment.
Common international standards
The international Electrotechnical Commission has issued the standard for the detection of the frequency-induced breakdown voltage of insulating oil, which is a global universal detection criterion. The mainstream domestic detection standards maintain consistency in technical aspects with it and can achieve mutual recognition of detection data at home and abroad.
General oil product detection standards in North America: In terms of electrode spacing settings and voltage increase operation forms, there are differences from domestic standards. Relevant detection work involving foreign affairs can be carried out by referring to the corresponding standards.
Post time: May-19-2026