Connecting Terminal Blocks To World Standards: A Global Paradigm For Technology, Safety, And Application
In the field of electrical connections, as the core component for achieving safe and efficient interconnection of wires, the design and manufacturing standards of terminal blocks directly affect the reliability of industrial automation, new energy, rail transit and other fields. At present, the global terminal block industry has formed a technical system centered on international standards (such as IEC 60947 series), EU standards (EN 60998), and US UL certification, promoting the evolution of products towards high-density, high-voltage, and intelligent directions.
1、 Core requirements of international standards
Electrical performance
Global standards set strict thresholds for parameters such as contact resistance, insulation resistance, and withstand voltage strength. For example, IEC 60947-7-1 requires that the contact resistance of terminals at rated current should be less than 50 μ Ω to ensure that there is no significant temperature rise during high current transmission; UL 486A stipulates that insulation materials must pass a 1500V withstand voltage test to prevent leakage risks.
mechanical strength
The terminal needs to withstand physical stresses such as repeated insertion and extraction, vibration, and thermal expansion and contraction. The EU EN 60998 standard requires that the contact force attenuation rate of spring type terminals shall not exceed 20% after 1000 insertions and removals, ensuring long-term stability during use.
environmental adaptability
For extreme environments such as salt spray, humidity, and high temperature, international standards require terminals to pass salt spray tests (such as ASTM B117) and high temperature aging tests (such as IEC 60068-2-2). For example, the copper terminal blocks developed by Huaxi Technology are treated with nickel plating and can work stably within the range of -40 ℃ to 125 ℃, meeting the needs of new energy equipment.
2、 Adaptability to global application scenarios
Industrial Automation
In the context of intelligent manufacturing, plug-in terminals (such as the Phoenix CLIPLINE series) support modular assembly of equipment through quick connection design, reducing downtime. Its anti misconnection structure (such as key controlled positioning) complies with the IEC 61984 standard to avoid misconnection of the circuit.
new energy sector
Photovoltaic inverters, wind power converters and other equipment have higher requirements for terminal voltage resistance. For example, H-type through wall terminals are made of PA66 flame-retardant material (UL94 V-0 grade), which can withstand 1000V DC voltage and meet the connection requirements of solar panels.
rail transit
Spring type terminals, with screw free crimping technology, can maintain a constant contact force of 0.5N to 5N in vibration environments, meeting the IEC 60512-16-3 standard and widely used in train control cabinets.
3、 Technological Innovation and Standard Evolution
Optoelectronic coupling technology
Jiete RPC optical isolation terminal achieves signal transmission and strong electrical isolation through built-in optoelectronic devices, complying with IEC 62103 standard, and reducing electromagnetic interference in industrial robots, elevator control and other fields.
Intelligent monitoring
Some high-end terminals are integrated with temperature sensors, which can monitor the temperature rise of contact points in real time. The data is transmitted to the PLC system through the I ² C interface, providing early warning of loosening risks and complying with the ISO 13849 functional safety standard.
4、 The Global Competitiveness of Chinese Enterprises
By introducing German imported crimping machines and high-precision molds from Japan, the terminal crimping accuracy has reached ± 0.01mm, reaching the international first-line level. Its products have passed CE, UL, and T Ü V certifications and have been exported to more than 60 countries, with a market share of over 30% in the Southeast Asian photovoltaic market.
Conclusion
The wiring terminals that are in line with world standards are not only the cornerstone of electrical safety, but also the key nodes for equipment interconnection in the Industry 4.0 era. From material selection to manufacturing processes, from functional design to environmental adaptability, the stringent requirements of global standards are driving the industry towards higher reliability and intelligence. In the future, with the explosion of new energy, 5G communication and other fields, terminal blocks will carry more missions of technological breakthroughs and industrial upgrading.
