The core difference between the non-gassing test transformer and the conventional test transformer lies in the control standard for the local discharge quantity of the equipment itself. This difference directly determines the testing accuracy, application scenarios, and comprehensive performance of the two types of equipment.
The non-gassing test transformer can control its own local discharge quantity to an extremely low level, typically not exceeding 5 picocoulombs. This ensures that the equipment itself does not generate interference signals, thereby guaranteeing the accuracy of subsequent testing. In contrast, the conventional test transformer has a higher local discharge quantity, usually exceeding 50 picocoulombs, and cannot meet the requirements for high-precision insulation testing. There are significant differences in multiple core performance and usage characteristics between the two types of equipment, as follows:
1. Core Performance Differences
1. Local Discharge Quantity
The non-gassing test transformer has an extremely low local discharge quantity, typically not exceeding 5 picocoulombs, which is far superior to the general industry standards. The testing process is free from interference signals from the equipment itself. The conventional test transformer has a larger local discharge quantity, generally exceeding 50 picocoulombs, and the internal discharge signals from the equipment can cause severe interference to precise testing.
2. Core Function
The non-gassing test transformer is mainly used for precise local discharge measurement and externally applied withstand voltage tests. Its core function is to accurately detect the tiny and hidden defects in the insulation of electrical equipment, suitable for high-precision testing scenarios. The conventional test transformer can only conduct power frequency withstand voltage tests and can only assess the overall strength of the equipment’s insulation, without the ability to measure local discharge, and cannot identify the subtle hidden dangers in the insulation.
3. Testing Accuracy
The output waveform distortion rate of the non-gassing test transformer is extremely low, stable within the range of 1%-3%, and the equipment has excellent anti-interference ability. The collected test data is true, accurate, and reliable, meeting the requirements of precise testing. The waveform distortion rate of the conventional test transformer is generally over 5%, susceptible to external interference, and has poor test stability and low accuracy, only suitable for basic testing scenarios.
2. Usage Characteristics Differences
1. Safety Risk
The non-gassing test transformer mostly adopts an inflatable structure, completing insulation operations with inert gas, eliminating the risks of oil leakage and fire from the source. It is also equipped with professional electronic protection devices, achieving a high overall safety protection level. The conventional test transformer is mainly designed with an oil-immersed structure, with potential risks of oil leakage and fire, and the accompanying protection structure is relatively simple, with limited safety protection capability.
2. Portability
The non-gassing test transformer adopts a lightweight structural design, compared to traditional oil-immersed equipment, the weight can be reduced by 20%-60%, and it is small in size, facilitating on-site transportation, deployment, and installation, suitable for various outdoor and confined working scenarios. The conventional test transformer has a bulky structure, with the overall weight often exceeding 500 kilograms, making it difficult to move, disassemble, and install, and lacking flexibility in on-site operations.
3. Maintenance Cost
The daily maintenance of the non-gassing test transformer is simple, with inflatable models basically achieving maintenance-free, without problems such as oil leakage and oil contamination, and the operation and maintenance cost is extremely low, with no environmental protection risks. The conventional test transformer requires regular oil filtration, oil replacement, and other maintenance work, with a high long-term maintenance cost, and the problem of oil leakage can easily cause environmental pollution, presenting certain environmental protection risks.
3. Core Advantages of the Non-gassing Test Transformer
1. Precise and reliable testing, eliminating testing errors
With an extremely low local discharge quantity, the equipment does not generate additional discharge interference signals during testing, accurately capturing the weak discharge signals of the tested equipment, effectively avoiding misjudgment and missed judgment caused by equipment interference. At the same time, the output waveform of the equipment is pure and has a low distortion rate, providing stable and standard high-voltage power supply for various precise high-voltage tests, comprehensively ensuring the authenticity and accuracy of the test results, and accurately identifying hidden defects in the insulation.
2. Safe and efficient, suitable for multiple scenarios of operation
The inflatable insulation structure completely eliminates the risks of oil leakage and fire, suitable for various high-fire-resistant operation sites, with significantly improved safety. Based on the efficient gas-insulation technology, the volume and weight of the equipment have been significantly optimized, effectively reducing the manpower and time costs for on-site transportation and installation. At the same time, the modern non-discharge test transformer integrates intelligent functions such as automatic protection, rapid voltage rise, and optical isolation. The operation process is simple, which can significantly improve the overall operation efficiency of high-voltage tests.
IV. Classification of Applicable Scenarios
The core basis for the selection of these two types of equipment is the testing purpose. Different scenarios correspond to different compatible equipment.
Scenarios that must use non-discharge test transformers: Partial discharge tests for core power equipment such as GIS, power cables, and transformers; Type tests and factory tests for high-voltage-level electrical equipment; Various precise insulation diagnosis tests conducted by research institutes and authoritative testing institutions.
Scenarios that can use conventional test transformers: Basic power frequency withstand tests for low-voltage distribution equipment; Routine insulation strength assessment of finished equipment in the electrical workshop; Basic withstand test scenarios without strict requirements for test accuracy and anti-interference.
Non-discharge test transformers focus on high precision, high safety, and high stability. Their core positioning is as a precise detection tool for quality control of high-voltage electrical equipment, and their core value lies in identifying tiny and hidden defects within the insulation. Conventional test transformers focus on basic insulation performance assessment and can only verify the overall insulation strength of the equipment. They have a simple structure and basic functions, and are only suitable for basic withstand test scenarios with lower precision requirements.
Post time: May-28-2026