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Maintenance of the transformer: 1. To preserve the insulation properties of the high-voltage generator and the insulating oil contained within it, it is generally not advisable to open the observation windows or loosen the fixing screws around them, in order to prevent the oil from absorbing moisture or picking up dust, which could reduce its insulation capabilities. 2. When it is necessary to replace the oil, assistance from the local power supply authority should be sought to check the properties of the new oil, ensuring that its insulation strength is not less than 25,000 volts/2.5 millimeters ； The oil insulation strength within the combined head should be above 30,000 volts/2.5 millimeters. 3. When installing or replacing high-voltage rectifier tubes or the X-ray tube during head replacements, the outer surfaces of the rectifier tubes or X-ray tube must be wiped clean with a dry cloth dipped in ether, to prevent a reduction in the insulating properties of the insulating oil. 4. While working, it is necessary to regularly check whether there are any abnormal noises coming from the high-voltage generator head during irradiation; if there are sounds such as squealing or cracking, use should be stopped immediately, the cause identified and resolved before continuing use. 5. The filament voltage of the high-voltage rectifier tubes does not need to be measured frequently, but it can be measured again after significant changes in power supply conditions or after a period of time, to ensure that the filament heating data meets the specified requirements and to maintain balanced output from all four tubes. 6. If the X-ray room does not have a wooden floor, it is advisable to place the high-voltage generator on a special wooden base to prevent moisture from affecting it. 7. When inspecting any components inside the high-voltage generator, it is necessary to first disconnect the wiring of the high-voltage primary side. It is strictly prohibited to inspect any components under high pressure ； At the same time, it is strictly prohibited to remove high-pressure components or internal components of the machine head from the box for high-pressure testing. 8. High-voltage generators with full-wave rectification still retain static charge after power is cut off; touching the high-voltage components at this time can result in an instantaneous electric shock discharge. Therefore, it is necessary to wait a few minutes after the machine is powered off for the charge to dissipate gradually before attempting to touch or inspect it. If there is a high-voltage capacitor, it must be discharged first! Touch the inspection again. 9. The high-voltage socket of the high-voltage generator must be filled with dehydrated vaseline or insulating oil to prevent discharge due to air gaps. However, if it operates continuously for a long time or in an environment with high room temperatures, the vaseline or insulating oil will expand and escape as a result of heat. In such cases, the plug must be removed, the existing vaseline or insulating oil wiped clean and dried with ether, followed by the application of dehydrated vaseline or the injection of insulating oil before use again. 10. The high-voltage generator or combined head must have a proper grounding wire; it is necessary to regularly use an ohmmeter to check whether there is conductivity between its casing, the control panel casing, and the external grounding wire, and to tighten the grounding bolts. 11. Since the combined head is equipped with an X-ray tube, vibrations or collisions should be avoided as much as possible. When moving the super-long fluorescent screen or the vertical arm up and down, do not apply excessive force, and the movement speed should not be too fast, in order to prevent the X-ray tube from being subjected to vibrations. 12. The X-ray tubes in combined units generally have low power, small casings, and limited oil volume, which results in weak heat dissipation. Therefore, it is necessary to strictly adhere to the operating specifications for these X-ray tubes and to regularly monitor their heat dissipation performance ； Continuous operation time should not be too long, to prevent the anode surface of the X-ray tube from overheating and melting, which could cause damage, or to avoid a decrease in insulation strength due to overheated oil, leading to breakdown of the high-voltage components. When room temperatures are high in summer, a regular electric fan can be used to help cool the machine head. 13. Regularly check the window at the front of the machine; if bubbles are detected, they should be removed promptly, and any oil leakage or seepage should be addressed immediately. Maintenance of high-voltage cables: 1. The surface of high-voltage cables must be kept clean; they should not be exposed to moisture, freezing, heat, or pressure. When the cable gets wet, water seeps inside, reducing insulation and making it prone to breakdown ； Freezing causes the rigid gel layer to crack and discharge electricity ； It is prone to absorbing moisture and expanding/deforming when heated ； Compression causes the metal mesh layer, which serves as a protective layer, to be damaged. 2. It is necessary to prevent insulating oil from eroding high-voltage cables, as insulating oil has a strong corrosive effect on rubber. 3. Do not over-bend the high-voltage cable. If bent excessively, the capacitive charge formed between the core wire and the metal mesh at the bend site becomes concentrated, making it easier for the area at the bend to be broken down by high voltage. 4. The filler inside high-voltage cable plugs is usually made by mixing rosin or asphalt with paraffin insulating oil; it often melts and flows out at the X-ray tube end due to heat, so regular inspections are necessary, and any such issue should be addressed promptly. 5. The X-ray tube housing is grounded through the metal mesh layer of the high-voltage cable; it is necessary to regularly check whether the fixing rings at both ends of the cable are securely attached to the X-ray tube and the high-voltage generator. If a hissing sound of static discharge is heard under high voltage, this area should be checked first. 6. If there are signs of high-voltage breakdown on the high-voltage plug, in mild cases the core wire can be scraped out with a knife and the plug can still be used; in severe cases, it must be replaced with a new one. PS: The above content is from the WeChat official account Transformer Circle