In the power control system, electrical terminals, copper bars and functional modules undertake important tasks of current transmission, power distribution and signal connection. These components are often required to operate stably for a long time under complex working conditions, which will produce continuous current, local temperature rise and a certain degree of electromagnetic vibration during operation. Therefore, more strict requirements are put forward for screw strength, stability, anti-loosening performance and long-term reliability. Whether the selection of screws is reasonable will directly affect the reliability of electrical connection, heating control capacity and the safety of system operation.
YH FASTENER can provide diversified screw solutions for power equipment manufacturers to meet the assembly requirements of different electrical terminals and functional modules.
Application of screws in terminal block fixing
In power distribution cabinets, control cabinets and electrical equipment, various terminal blocks are usually fixed with mounting plates or conductive structures by screws. The screws are mainly used for fixing the terminal base, compressing the conductor and stably connecting the terminal structure as a whole.
Due to the long-term carrying current of the wiring terminal, if the screw clamping force is insufficient or the dimensional accuracy deviation is too large, it is easy to cause poor contact, local heating and even ablation risks, thus affecting the system operation safety.
Brass screws are suitable for electrical terminals and conductive connections due to their good conductivity and corrosion resistance in such applications; At the same time, set screws can be used for terminal positioning and pressing structures to ensure long-term stable electrical contact performance and effectively reduce contact resistance and heating risks.
Application of screws in connection of copper bar compression structure
As an important conductive connection structure in the power system, the copper bar is usually pressed and fixed by screws to achieve a stable current transmission path. Screws are mainly used for fastening connection between copper bars, copper bars and terminals, copper bars and equipment wiring points.
The connection part of the copper bar carries large current for a long time, and local temperature rise and thermal expansion and contraction change will occur during the operation process, so the requirements for the stability of the screw clamping force are very high. If the screw is loosened, it may increase the contact resistance, increase the heating and even cause a safety hazard.
In practical application, Carbon Steel Screws can provide stable preload and structural strength, improving the long-term reliability of copper bar connection.
Application of screws in installation of power module and cooling structure
The power module, power module and relevant heat dissipation structure are usually installed on the metal base plate, heat sink or support. The screws are mainly used for fixing the module base, compressing the radiator and connecting the overall structure.
Such parts will continuously generate heat during operation, with periodic temperature changes, which puts forward high requirements on the anti-loosening capacity and thermal stability of screws. If the screw preload is attenuated, it may cause poor heat dissipation, abnormal temperature rise of the module and even affect the service life of the equipment.
Sealing screws can be used close to the cooling air duct or the semi-enclosed cavity to prevent dust and moisture from entering.
With a stable and reliable screw solution, YH FASTENER continues to help power equipment manufacturers increase the reliability of electrical connections, reduce the risk of heating and loosening, and improve the stability and safety of electrical systems in long-term operation.
Please contact us for screw solutions that better suit your electrical connection terminal and functional module application scenarios.
Post time: Feb-06-2026
