The online monitoring device for cable sheath current is an important tool to ensure the safe and stable operation of the power system. It can monitor the circulating current status of the power cable sheath in real time and prevent cable accidents caused by multi-point grounding of the sheath. It is crucial to develop a scientific and reasonable daily maintenance plan to ensure its long-term stable operation. The following is a detailed daily maintenance plan for the online monitoring device of cable sheath current.

1、 Daily inspection and cleaning

Appearance inspection: Conduct daily visual inspections of the monitoring device to check if the device casing is intact, free from damage, deformation, or corrosion. Meanwhile, confirm that all connecting cables are securely fastened and free from looseness or detachment.

Cleaning and maintenance: Regularly wipe the surface of the device with a dry, soft cloth to remove dust and dirt. Avoid using chemical cleaners or damp cloths to prevent damage to the device. For hard to reach areas, gently blow with compressed air.

2、 Sensor and measurement circuit inspection

Sensor calibration: Regularly calibrate local sensor units to ensure their measurement accuracy. The calibration cycle can be determined based on actual usage, and it is generally recommended to conduct it every six months to one year.

Measurement circuit inspection: Check if the measurement circuit is connected correctly and there are no short circuits or open circuits. At the same time, the accuracy of the measurement circuit can be verified through the built-in testing function of the device or external testing equipment.

3、 Communication and Data Transmission Inspection

Communication testing: regular inspectionRS485The working status of the communication module ensures normal data transmission between it and the local monitoring cabinet. Communication quality can be verified by sending test instructions or viewing communication logs.

Data backup and recovery: Regularly backup and monitor data to prevent data loss. At the same time, test the data recovery function to ensure that data can be quickly recovered when needed.

4、 Environmental adaptability inspection

Temperature and humidity monitoring: Check whether the working environment temperature and humidity of the device are within the specified range (ambient temperature -20℃～85℃, relative humidity<95%）. If it exceeds the scope, corresponding measures need to be taken for adjustment.

Protection level confirmation: Confirm that the protection level of the device meets the requirementsIP65Standards can effectively prevent the intrusion of dust and moisture.

5、 Fault handling and recording

Troubleshooting: When the device malfunctions, quickly conduct troubleshooting to determine the cause of the problem. For simple faults, they can be handled by oneself; For complex faults, it is necessary to contact the manufacturer or professional maintenance personnel for repairs.

Maintenance records: Establish detailed maintenance records, including maintenance time, maintenance content, replaced parts, and other information. This helps track the operating status of the device and provides reference for subsequent maintenance work.