Electrical Connectors (Terminals)
Screw terminal or connector is a type of electrical connector where a wire held by tightening a screw.
A brief introduction is presented on screw terminals here.
Many people around the world connect two wires by an unsafe method in which the metal part of the wires are joined and then covered by a tape. This creates a totally unsafe, inefficient connection which not only is unstable but also may cause such incidents as short circuits or fire. IV will tell you why you should use safe connectors for making these connections.
In general, wires fed into electrical terminals are directly placed under the screws or under a metal clamp to provide better protection against tears and damages. According to global standards, are wires and cables are insulated to prevent electrocution. Before connecting to terminals, wires must be stripped, placed into the port, and screwed onto the metal part. It is recommended to use wire lugs available in the market to provide a safer connection. Screwdrivers should be properly selected depending on the design of the terminal and the screw.
Electrical connectors are widely used in wiring buildings to distribute electricity into switches and power outlets, lighting systems, appliances, office equipment, air conditioners, etc and our products can supply power up to 600 V and 80 A.
In addition, these connectors can be connected to the point of use.
Electrical connectors or terminals are also used to provide earth connection, electrical and electronic protection, acoustic systems with their inputs/outputs, and control systems and alarms.
Terminal blocs come in different shapes with two, three, or more ports isolated using plastic (or other materials depending on the application). Each port is equipped with a (brass or copper) core and two screws.
The arrangement extends to the last connection and the number of ports depends on the application and point of use. In our proprietary specifications, there is no limitation for the number of ports.
In general, these terminals can be arranged in the form of a string of terminals with a large number of screws, creating a busbar for distributing power as the main input.
Terminals with two or three connections are often used in lighting, transformers, or electronic ballasts. However, to ensure proper performance and safety, polyamide coatings are used to protect connections as temperature reaches 110 °C as the electrical current increases.
A more extensive description of solderless terminals will be provided later.
Our products come in different colors and customized materials including polyethylene, polyamide, PVC, etc with a number of options described below.
Applications: thermoplastic applications, fibers, tubes, films, etc.
Polymerization technique: free radical chain
Morphology: very crystalline (linear polyethylene), amorphous, low-density (branched) polyethylene
Melting point: 120-130 °C
Glass transition temperature: about -80 °C (the temperature does not change given the low crystallinity of the polymer)
General purpose terminals are made of these materials. They can be used at -40 to 75 °C and have found wider applications due to their low cost.
Polyvinyl chloride (PVC) is among the most widely used polymers among vinyl polymers. It is found as soft (with softener) or hard PVC.
Production process: PVC is generally produced by free radical polymerization using a wide range of solution or bulk polymerization. The former is used in producing two different types of PVCs: semi-crystalline PVC consisting of spherical parts and amorphous PVC.
Types of PVC:
Hard PVC lacks softeners while soft PVC, which contains softeners, is marketed as PVC-S or PVC-E. The former is produced through suspension polymerization ad the latter is formed through emulsion polymerization.
Properties of PVC:
Disadvantages: It has low chemical, thermal, and optical stability. It tends to gradually break up at high temperatures or become fragile at low temperatures. Therefore, most PVC products contain stabilizers to address these problems. This shortcoming is compensated by low prices.
Advantages: It is compatible with stabilizers and additives.
Polymer degradation occurs at 200 to 300 °C where large amounts of HCl are produced.
Soft PVC is a good insulator and, therefore, often used as wire insulators. Other applications include clothes, thermal insulators (PVC foams), auto parts, tapes, and coatings.
Soft PVCs have been used in a number of IV products. Our top quality products contain PVCs consisting of non-flammable materials that make these products suitable for protection against very high currents and high temperatures as chlorine is released to stop fire. This makes these products suitable candidates for use in petrochemical industries.
Different types of polyamide: PA6, PA6.6, PA11, PA6,6.6, PA12, etc.
Polyamides are also referred to as nylon.
In general, PA6 and PA66 have the following properties:
- High mechanical strength for grades reinforced by fiberglass
- A proper balance between strength and impact strength
- High application temperature up to 250 °C depending on the grade
- Suitable electrical properties and flammability, enhanced for the grade FRV0. PA66 has higher strength particularly at temperatures higher than 180 °C. At about 50 °C, PA66 has a higher melting point than PA6.
IV high-voltage refractory products are made of fibrous PA6.6 made in the Netherlands. Given their high sensitivity ad special applications in major industries, like petrochemical industry, these products are made of top quality materials.
Other advantages of IV Industrial Group products:
IV Industrial Group products
• Can tolerate a maximum voltage of 600 V, in line with global standards;
• Can tolerate a current up to 80 A because of using standard connectors;
• Have been made of best quality brass alloys according to MS58 DIN 17660 to meet the highest conductivity and electrical resistance requirements up to 3 mΩ;
• Tolerate moisture and water infiltration in customized connectors coated using nickel coating;
• Are equipped with protectors for wires in customized products to prevent cuts and tears (proprietary IV products);
• Can tolerate a maximum torque of 20 Ibs when screwing using electrical or pneumatic screwdrivers due to customized brass alloys used in the products;
• Are made of top quality screws that meet standards to make it easier to wrench/fix the products;
• Are equipped with insulations resistance to voltages as high as 3,000 V DC for a minute to prevent electric shock;
• Have standard connectors resistance to voltage surges up to 6,000 V at any moment; and
• Are equipped with protecting coatings for screws in customized products to provide greater precautions (e.g. against electric shock).
Electrical Connectors (Terminals)
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Electrical Connectors (Terminals)