Electric Conduction Material:
As electronic conduction material, cooper has outstanding electronic and mechanical properties. Copper with different natures can meet SUPU terminal block shape requirement for electric conduction parts, and the electrical requirement without rupture danger when stressed. Copper conductor is plated with tin which makes it a better electric contactor with minor electric resistance. Tin-plated surface has good electric conducting and anticorrosive effects. Tin-plated processing can protect the antiwear ability of PCB terminal blocks and connector. To increase their antiwear ability, connectors are also plated with tin to keep the same lasting welding effect.
Electrical Insulating Material:
As an excellent insulation material, Nylon 6.6 is always the first option for manufacturing the housing of terminal blocks and connectors; it is also accepted by most of the international testing organizations. Because of its excellent anti-puncturing against leaked current, which could reduce the air and the creeping distance of leaked current, Nylon has been used as the basic materials for SUPU terminal blocks. Nylon 6.6 has spring, rigidity and resist most chemical corrosion and has been ranked as 2 flame retardant rating: V0 or V2. Modified nylon 6.6 adopted by SUPU terminal blocks do not contain halogen, fluorocarbon, chlorine-carbohydrate, silicon, asbestos, cadmium, formaldehyde, so all electrical insulating materials applied in SUPU terminal block do not contain poisonous elements.
Spring clipping Material:
All clipping spring used by SUPU terminal blocks is of high-quality and careful-chose 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 fog from ocean, exhaust gas in cities and industrial gas, such as: sulfur dioxide and hydrogen sulfide. When it is at common 22℃, it can resist 30% brine solution and 30% phosphatic acid.
I. Comparison between Spring Clipping and Screw Clamping:
A usage survey of SUPU terminal block in wide range of clients has approved, taking manual wire-connecting for example, that it costs spring clipping 50% less time than of screw clamping. And spring clipping still holds the advantages when it comes to electric screwing. (One can save more time if omitting some preparation steps such as pressing the end of the wire tightly, connecting cold joints or tin applying, etc.)
Screw clamping connection "wholly depends on manual operator", that means its tightness is decided by operator's judgment. This will be more or less managed by operators or by certain values from special torsion screw driver manufacturers. When connecting wires on-site, it is even more difficult to assure proper tightness of screw clamping .Spring's characteristic of clipping automatically may allow unskilled operators to finish connecting with perfect joint. Whoever operates will make the same exact joint and the tool is just a standard screwdriver, SUPU spring terminal block has different connecting ways, including front, side and 45。angle entry.
Connecting steps: insert a tool→insert conducting wire without insulating coat→extract the tool and then the conducting wire is clipped automatically.
SUPU spring terminal block--adjust clipping power automatically according to different diameters of conducting wire, reach the same high-quality connection no matter operators are skillful or not.
SUPU spring terminal block---airtight connection, minor contact resistance, anticorrosive, anti-vibration, shock resistance.
II. Advantages of spring clipping terminal block:
Unlike screw terminal block, spring terminal block needn’t to be checked often or rescrewed because of the loose connection for vibration, temperature circulation, or broken screw thread. With its fixed reliability, spring terminal block will decrease machine halting time and maintenance frequency. According to statistics that 35%-50% equipment maintenance is because of bad connection. Considering the high maintenance cost and the loss of manufacturing time, saving in such a project is very necessary.
For security, reliability and convenience of obstacle avoidance, many industrial standards and national standards regulate that "every clamping point can only be with one conducting wire". SUPU spring terminal block can provide clients with terminal blocks that are with two-wire connector, three- or four-wire connectors. In both cases, every wire has its own tight connection joint and it does not take much time space than two-wire terminal block.
Spring clipping is designed to have proportional clipping power with different types of wire. Thicker the wire is, more powerful clipping is. Combining special curved surface of guide tube with flat and smooth spring surface, it can give tight connection without damaging wires. At the same time, the angle of spring is designed to be with special property, and the clipping will be more powerful when it is pulled or drawn.
There is a complete entrance for conducting wire in SUPU spring terminal block and connectors, which can hold wires tightly. Combining spring’s special properties, outer housing of SUPU terminal blocks can avoid twisted lines loosing by fixing conducting wire in contact area automatically.