secatec electrical components Germany secatec model secatec price

secatec electrical components are electrical control devices. When the change in the input quantity (excitation) meets specified requirements, they cause a predetermined step change in the controlled quantity in the electrical output circuit. They facilitate interaction between the control system (also known as the input circuit) and the controlled system (also known as the output circuit). Typically applied in automated control circuits, they function as "automatic switches" that use small currents to control large currents. Therefore, they perform roles such as automatic regulation, safety protection, and circuit switching in electrical circuits. A relay is an electrical control device that, upon receiving a specified input quantity for a sufficient duration, causes a predetermined step change in the controlled quantity in the electrical output circuit. When the input quantity drops to a certain level and remains there for a sufficient duration, it returns to its initial state.

secatec electrical component requirements

1. Copper and aluminum rods, commonly used for power cables, are drawn at ambient temperature through one or several drawing dies on a wire drawing machine to reduce their cross-sectional area, increase their length, and improve their strength. Wire drawing is the first process in wire and cable manufacturing plants, and the primary process parameter is die matching technique. 2. Copper and aluminum single wires are heated to a specific temperature to improve toughness and reduce strength through recrystallization, meeting the requirements for conductive cores in wires and cables. The key to the annealing process is to prevent oxidation of the copper wires. 3. To improve the flexibility of power cables for easier installation, the conductive core is made by stranding multiple single wires. Stranding methods are classified as regular stranding and irregular stranding. Irregular stranding includes bunch stranding, concentric composite stranding, and special stranding. To reduce the occupied area and geometric dimensions of the power cable, compacted stranding is applied during conductor stranding, transforming the standard circular shape into semi-circular, sector-shaped, tile-shaped, and compacted circular shapes. This type of conductor is primarily used in power cables. 4. Plastic power cables mainly use extruded solid insulation layers. The tolerance of the insulation thickness is a key indicator of the extrusion process quality. Most product structural dimensions and their tolerances are clearly specified in standards. The surface of the plastic insulation layer must be smooth, free from defects such as roughness, scorching, or impurities. The cross-section of the insulation layer must be dense and robust, with no visible pinholes or bubbles. 5. Multi-core power cables are generally stranded into a circular shape to ensure form stability and reduce the overall cable profile. The stranding mechanism is similar to conductor stranding; due to the larger lay length, non-back-twist methods are mostly used. Technical requirements for cabling include: preventing torsional bending caused by the rotation of shaped insulated cores, and avoiding damage to the insulation layer. During cabling, two additional processes are usually performed: filling, to ensure the cable remains round and stable after cabling; and binding, to keep the cable core compact. 6. To protect the insulated cores from damage by the armor, appropriate protection is required for the insulation layer. Inner sheaths are classified as extruded inner sheaths (separator sleeves) and wrapped inner sheaths (cushioning layers). Wrapped cushioning layers replace binding tapes and are applied simultaneously with the cabling process. 7. For power cables laid underground that may withstand certain positive pressure during operation, an internal steel tape armor structure can be selected. For power cables installed in locations subject to both positive pressure and tensile forces (such as underwater, in vertical shafts, or in soil with significant elevation differences), a structure with internal steel wire armor should be selected. 16. The outer sheath is the component that protects the cable's insulation layer from environmental corrosion. The main functions of the outer sheath are to improve the mechanical strength of the power cable, resist chemical corrosion, prevent moisture and water ingress, and inhibit combustion. Depending on the specific requirements for the power cable, a plastic sheath is directly extruded using an extruder.

secatec electrical component classification

Classification by application: toggle switches, band switches, record/playback switches, power switches, selector switches, limit switches, control switches, changeover switches, isolating switches, travel switches, wall switches, smart fire protection switches, etc. Classification by structure: micro switches, rocker switches, toggle switches, slide switches, push-button switches, keypad switches, as well as modern membrane switches and dot switches. Classification by contact type: switches can be classified into a type contacts, b type contacts, and c type contacts based on contact type. Contact type refers to the relationship between the operating status (pressing the switch) and the contact state (closing). Suitable contact types must be selected based on the application. Classification by number of switches: single-control switches, dual-control switches, multi-control switches, dimmer switches, speed control switches, splash-proof boxes, doorbell switches, sensor switches, touch switches, remote control switches, smart switches, card-operated power switches, and bathroom heater dedicated switches.

secatec electrical component classification

For most conductors, resistance remains nearly constant at a given temperature; this is called linear resistance. Some materials exhibit resistance that changes significantly with current (or voltage), resulting in a curved V-I characteristic; these are called nonlinear resistors. For nonlinear resistors, the ratio of voltage to current at a given operating point is the static resistance, while the slope of the V-I curve represents the dynamic resistance. Although expressing nonlinear resistance characteristics is complex, these nonlinear relationships are widely applied in electronic circuits.

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