The electrical requirements of the various molding requirements and the conductive member when used without the risk of stress cracking. Copper conductive surface plated with tin alloy, can ensure good contact performance and smaller contact resistance. Tin alloy plating in addition to a good electrical properties, but also has good corrosion resistance. Tin alloy surface treatment protects the printed circuit board terminals and connectors with solder pins weld-ability. In order to increase the wear resistance pluggable connector, and in this part of the tin alloy is also used this treatment can also be long-term weld-ability.
In order to meet different products’ practical needs, one can choose different materials according to specific application. As the coat of terminal blocks and connectors, nylon 6.6 is the first option for excellent electrical insulating material. It is also accepted by almost all the international testing organizations. Nylon has been used as the basic material for SUPU terminal block because of its outstanding anti-puncturing ability against leaking current, which has been up to CTI600 according to IEC112 and thus reduce the moving distance of air and leaking current. Nylon 6.6 has springiness, rigidity and is resistant to most chemical corrosion and has been ranked as Catalogue Extinguishing V-0 or V-2. Character-changing nylon 6.6 adopted by SUPU terminal block doesn’t contain halogen, fluorocarbon, chlorine-carbohydrate, silicon, asbestos, cadmium, formaldehyde, so all electrical insulating materials applied in SUPU terminal block do not contain poisonous elements.
All clamp spring used by SUPU terminal block is of high-quality and careful-elected nickel-chrome spring steel (CrNi). It has good tensile strength and corrosion resistant property proved by many years of practical experience. It can resist salty air from ocean, exhaust gas in cities and industrial gas, such as: sulfur dioxide and hydrogen sulfide. When it’s common 22°C, it can resist 30% brine solution and 30% phosphatic acid.
1、Comparison of the spring clamps and threaded clamping
SUPU’s surveys which send to many customers confirm that manual wiring, for example, spring clamp terminal blocks less than screw-type terminals with more than 50%. Even operate with an electric screwdriver, spring clamps still occupies a time-saving advantages. (Preparation leads in many cases, such as pressing a thread, connected on a cold joints or tin, can be omitted if additional savings can be more time.)
Screw clamp connection "is totally dependent on the operator," that is the tightness of the clamping screws, you need to determine the operating personnel. This may be the number of the operator or a specific torque screwdriver factory set point controlled. When field wiring, is more difficult to ensure proper tightness of the screws holding. Features automatic clamping spring allows less skilled operators complete contact with a high-quality connection. Whoever operations can be done accurately and consistent contact connection. The tools they use only a standard screwdriver, SUPU spring terminals have a positive connection, side wiring and wiring in the form of 45 degrees. Spring Terminal Blocks steps: Insert the tool - insert the stripped wire - extraction tool, automatic wire clamp.
SUPU spring terminals - can be automatically adjusted according to the wire diameter clamping force, regardless of whether or not a skilled operator can reach the same connection quality.
SUPU spring terminals - up airtight contact, contact resistance, anti-corrosion, anti-vibration, shock, prolonged Repairer.
2、Spring clamp terminals superiority
Unlike screw-type terminals as terminals for spring does not require frequent inspection or re-tightened, because the disturbance, temperature cycling, stranding off shares caused by the contact and become loose. After using spring terminals, its inherent reliability reduces downtime and maintenance times users. According to statistics 35-50% of the equipment maintenance is caused due to poor contact. Considering the high cost of repairs and lost production time, so this savings is significant.
For safety, reliability and ease of troubleshooting purposes, many industry standards and national standards, "each clamping point clamping a wire." SUPU spring terminals can be used to provide users with two-wire, three-wire or four-wire contact terminals, connect easily applied equally across the upper insulating gap bridging or terminal adjacent together. In both cases, each line has its own contact grip, and because of the positive terminal characteristics, it does not require more space than a two-wire terminal. Spring clamps has been designed with consideration given according to different line numbers proportional to the clamping force, diameter thick, the greater clamping force. And bus bars having special curvilinear surface mating flat surface area of the spring can be provided without damaging the wire fastening. At the same time, the spring angle is designed to be a special attribute, when pulling force, but also increases the clamping force.
SUPU spring terminals and connectors have a complete wire entrance, can tightly clamped wire. SUPU housing design, combined with the unique properties of the spring to ensure that the wire is automatically positioned at the contact area, which can effectively avoid stranding spread.