1、 Daily inspection and cleaning

1. Visual inspectionRegularly check whether the casing of the residual current transformer is intact, whether there are cracks, damages or deformations. At the same time, check if the wiring terminals are securely fastened and if there is any looseness or corrosion.
2. Cleaning and maintenanceWipe the transformer housing with a dry, soft cloth to remove dust and dirt. Avoid using chemical cleaners or rinsing directly with water to prevent damage to the equipment.
3. environment checkEnsure that the installation environment of the transformer is dry, well ventilated, and free of corrosive gases or liquids. In humid environments, moisture-proof measures can be taken, such as using a well sealed shell or placing desiccants inside.

2、 Performance testing and calibration

1. Functional TestingRegularly conduct functional tests, simulate leakage state by pressing the test button, observe whether the transformer can act in a timely manner and issue an alarm or cut off the power supply.
2. Precision calibrationRegularly calibrate the accuracy of transformers according to equipment requirements and usage. The calibration content includes parameters such as measurement range, accuracy, response time, etc., to ensure that the performance of the transformer meets the requirements.
3. Insulation resistance testUse a megohmmeter to test the insulation resistance of the transformer and check if its insulation performance is good. The testing cycle is generally once every 1-2 years or after major equipment repairs.

3、 Wiring and installation maintenance

1. Wiring inspectionRegularly check whether the wiring of the transformer is correct, secure, and free from looseness or poor contact. At the same time, check whether the wiring terminals are heating up, and promptly handle any abnormalities.
2. Installation position inspectionEnsure that the installation position of the transformer is reasonable for easy maintenance and inspection in the later stage. Avoid installation in high temperature, humid or strong electromagnetic interference environments to avoid affecting equipment performance.
3. Moisture prevention and isolationIn humid environments, moisture-proof treatment should be done for transformers, such as using a well sealed casing or placing desiccants inside. At the same time, isolate the transformers in operation from harmful gases to prevent corrosion and damage.

4、 Fault handling and replacement

1. Fault identificationWhen the transformer malfunctions, such as misoperation, refusal to move, or inaccurate measurement, it should be identified and dealt with in a timely manner. The causes of the malfunction may include wiring errors, equipment aging, environmental interference, etc.
2. Fault handlingTake corresponding measures based on the cause of the malfunction, such as rewiring, replacing aging components, or adjusting installation positions. During the handling process, safety operating procedures should be followed to ensure personal and equipment safety.
3. Equipment replacementWhen the transformer is severely damaged or cannot be repaired, it should be replaced with a new device in a timely manner. When replacing, a transformer with the same model and specifications as the original equipment should be selected, and its performance should be ensured to meet the requirements.