Introduce the hazards of excessive connector temperature rise and how to prevent excessive connector temperature rise
The dangers of excessive temperature rise
The harm of excessive temperature rise of industrial connectors is actually very large. When the connector connects the circuit and the current passes through the circuit, the resistance of the contact part itself and the contact resistance will generate heat. When the heat continues to accumulate, the temperature of the contact part will continue to rise. Once it is too high, the stress of the contact part will relax, which will lead to high contact resistance, then weaken the electrical signal, and then cause a short circuit. In addition, the high temperature of the commodity will also accelerate the surface corrosion of the contact part, shorten the life cycle, and even cause fire and explosion, endangering the safety of users.
How to ensure normal temperature rise?
- Contact material selection
The contact parts of industrial connectors use highly conductive materials, which is conducive to reducing temperature rise. For electrical connectors with higher rated voltages, contact parts with high conductivity and materials with certain mechanical properties, such as chromium-zirconium-copper alloys, should be selected.
Contact parts usually use a surface coating treatment process to prevent excessive temperature rise. This is because copper easily reacts with gas to produce an oxide layer, which effectively reduces the contact point and promotes temperature rise. After coating treatment, the inactive metal metal and nickel in the coating can isolate the oxidation reaction. At present, the surface of the contact parts is mostly gold-plated or silver-plated. The thicker the coating film is, the more conducive it is to temperature rise. Of course, considering the cost, the coating thickness is measured according to the actual application requirements.
