What are the common faults of electrical connectors, and how to prevent electrical connectors from overheating?
1. Common fault analysis and solutions of electrical connectors
At present, the application of electrical connectors in daily life has become more and more extensive. Due to the small size and precise design of such devices, various situations often occur in use.
For some common faults, we also need to do corresponding analysis work and think about solutions:
①Temperature resistance At present, the maximum working temperature of the connector is 200°C (except for a few high-temperature special connectors), and the minimum temperature is -65°C. When the connector is in operation, the current generates heat at the contact points, causing the temperature to rise. Therefore, it is generally believed that the operating temperature should be equal to the sum of the ambient temperature and the temperature rise of the contact point. In some specifications, the maximum allowable temperature rise of the connector at the rated operating current is clearly specified.
② Resistance to the intrusion of moisture will affect the insulation performance of the connection H and corrode metal parts.
③ When the salt spray-resistant connector works in an environment containing moisture and salt, the surface treatment layer of its metal structural parts and contact parts may cause electrochemical corrosion, thereby affecting the physical and electrical properties of the connector.
④ Vibration and shock resistance Vibration and shock resistance is an important performance of electrical connectors, especially in special application environments, such as aerospace, railway and road transportation. It is an important indicator for testing the firmness of the electrical connector’s mechanical structure and electrical contact reliability.
⑤Other environmental properties According to the requirements of use, other environmental properties of electrical connectors include sealing (air leakage, liquid pressure), liquid immersion (the ability to resist specific liquid deterioration), low air pressure, etc.
2. Preventive measures to prevent electrical connectors from overheating
①When a fault is found, disassemble the electrical connector of the power cord, unscrew the conductive column in the socket of the electric water heater, polish it with zero abrasive cloth or abrasive paste until it is bright, and remove the wires and wirings at the connection between the power cord and the contact tongue of the electrical connector Oxidation of screws, tongues and conductive posts in electric water heater sockets to reduce contact resistance.
②Smear a little conductive paste on the power cord connector of the electric water heater and the conductive column of the socket.
③ If the tongue and terminal screws of the military electrical connector are severely burned, they should be replaced immediately.
④If the socket and conductive column on the electric water heater are seriously burned out, they should be removed immediately, and the socket and conductive column of the same specification should be replaced. When installing an electric water heater socket, a power knife switch should be installed.