Torque terminals (shear bolt type torque terminals), as the core connection components for AC output terminals, DC combiner terminals and high-power cabinet internal connections of PV inverters, are specially designed for the operating scenarios of PV systems featuring high current, wide temperature difference, long service life and high reliability. Compared with traditional crimp terminals and ordinary bolt connection terminals, they have significant technical and engineering advantages:
1. Precise Torque Control for Higher Connection Consistency
Adopting a fixed-torque shear bolt structure, the bolt head automatically breaks when tightened to the preset torque, realizing visual and standardized construction. It completely avoids problems such as insufficient torque and over-pressure damage caused by manual operation, ensuring constant contact pressure and stable contact resistance, and fundamentally reducing the risks of heating, arcing and equipment burnout.
2. Adaptation to High-Current and High-Power Working Conditions
It can meet the connection needs of high-power cables of 35mm²～150mm² for inverters. The low contact resistance design is suitable for the full-load operation of PV systems, effectively reducing line loss and improving system power generation efficiency. It is especially applicable to centralized inverters, string-type high-power models and energy storage converter (PCS) applications.
3. Excellent Thermal Cycle Resistance and Anti-Relaxation Performance
PV systems have large day-night temperature differences and frequent load fluctuations, which easily lead to loosening of traditional connections. Torque terminals have structural elastic compensation capability, which can long-term offset the connection relaxation caused by thermal expansion and contraction of conductors, ensuring no loosening and no heating during long-term operation, and significantly improving system reliability and maintenance cycle.
4. Universal for Copper and Aluminum Conductors, Compatible with Aluminum Alloy Cables
It is perfectly compatible with copper core cables and aluminum alloy cables widely used in PV projects, with excellent copper-aluminum transition connection performance, inhibiting electrochemical corrosion, improving weather resistance and service life in extreme environments, and reducing the material and construction costs of power stations.
5. Crimp-Free Installation for Efficient and Convenient Construction
It adopts a direct wiring structure, which can be installed without professional crimping tools. The operation is simple and fast, which greatly shortens the on-site construction time, reduces the requirements for construction personnel's professional skills, and effectively improves the construction efficiency of the photovoltaic power station. At the same time, the detachable design is convenient for later maintenance, inspection and line adjustment, reducing the maintenance cost of the system.
