Maintenance Strategy For Terminal Blocks: Improving The Reliability Of Electrical Systems

As a key connecting component in electrical systems, terminal blocks undertake important tasks of current transmission and signal transmission. Its reliability directly affects the stability of equipment operation and production safety, so scientific maintenance strategies are needed to reduce the risk of poor contact, overheating, and other faults.

1、 Regular inspection and cleaning

Long term exposure of terminal blocks to dust, oil, or humid environments can easily form an oxide layer or accumulate conductive impurities, leading to an increase in contact resistance. It is recommended to conduct a visual inspection once a month, focusing on observing whether there are any discoloration or burn marks on the surface of the terminals, and using specialized cleaning agents to remove the oxide layer and dirt. For terminals in vibration environments, it is necessary to increase the inspection frequency to once a week to prevent loosening due to mechanical stress.

2、 Standardized management of tightening torque

Loose terminals are the main cause of poor contact. During maintenance, it is necessary to strictly follow the tightening torque specified in the equipment manual and use a torque wrench for operation. For example, the tightening torque of copper terminal blocks is usually 5-7N · m, while aluminum terminals need to be reduced to 3-5N · m to avoid damage. At the same time, establish a fastening record file to record the torque values and operators for each maintenance, achieving traceable management.

3、 Environmental adaptability optimization

Targeted protective measures should be taken for high temperature, high humidity, or corrosive environments. In damp areas, protective terminals with sealing rings can be selected and regularly coated with rust proof grease; Install spring washers or locking nuts in vibration prone areas to enhance their resistance to loosening; For strong electromagnetic interference environments, it is recommended to use shielded terminals and optimize grounding design.

4、 Application of Intelligent Monitoring Technology

Introduce infrared thermometers or online monitoring systems to track terminal temperature changes in real time. When the temperature exceeds the ambient temperature by 20 ℃ or reaches 80% of the rated value, the machine should be stopped immediately for inspection. Some advanced systems can also predict the trend of terminal looseness through vibration analysis, achieving preventive maintenance.