kathrein-werke electrical components Germany kathrein-werke model kathrein-werke price

kathrein-werke electrical components are products whose raw material molecular composition is not altered during factory processing, and can be referred to as components. Components belong to devices that do not require an energy source. They include: resistors, capacitors, and inductors. Circuit-type components include diodes and resistors; connection-type components include connectors, sockets, connecting cables, and printed circuit boards (PCB). Devices are products whose raw material molecular structure is altered during factory production and processing. Devices are divided into active devices and discrete devices. The main characteristic of active devices is that they generate or consume electrical energy and require an external power supply. Discrete devices are divided into bipolar junction transistors, field-effect transistors, thyristors, semiconductor resistors, and capacitors. shi

kathrein-werke electrical component parameters

1. Voltage temperature coefficient: Refers to the rate of change of the nominal voltage of a varistor within a specified temperature range, i.e., the relative change in voltage across the varistor when the temperature changes while the current through the varistor remains constant. 2. Current temperature coefficient: Refers to the relative change in current flowing through the varistor when the temperature changes while the voltage across the varistor remains constant. 3. Nominal voltage: Refers to the voltage value across the varistor when a DC current is applied. 4. Voltage ratio: Refers to the ratio of the voltage generated by the current in the varistor to the voltage generated by the current in the varistor. 5. Maximum limiting voltage: Refers to the highest voltage value that the varistor can withstand across its terminals. 6. Leakage current: Also known as standby current, it refers to the current flowing through the varistor under specified temperature and maximum DC current conditions. 7. Residual voltage ratio: When the current through the varistor is at a certain value, the voltage generated across its terminals is called the residual voltage for that current value. The residual voltage ratio is the ratio of the residual voltage to the nominal voltage. 8. Surge current capacity: Also known as surge current, it refers to the maximum pulse (peak) current value allowed to pass through the varistor under specified conditions (specified time intervals and number of occurrences, applying standard impulse current). 9. Static capacitance: Refers to the inherent capacitance of the varistor itself. 10. Insulation resistance: Refers to the resistance value between the leads (pins) of the varistor and the insulated surface of the resistor body. 16. Voltage nonlinearity coefficient: Refers to the ratio of the static resistance value to the dynamic resistance value of the varistor under a given applied voltage.

kathrein-werke electrical component requirements

1. Copper and aluminum rods commonly used for power cords are passed through one or more drawing dies using a wire drawing machine at room temperature, reducing their cross-section, increasing their length, and improving their strength. Wire drawing is the first process in wire and cable companies, and the primary process parameter is die matching technology. 2. Copper and aluminum single wires are heated to a certain 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 wire. 3. To improve the flexibility of power cords for easier installation and laying, the conductive core is made by stranding multiple single wires. Stranding methods for conductive cores can be divided into regular stranding and irregular stranding. Irregular stranding includes bundle stranding, concentric composite stranding, and special stranding. To reduce the occupied area of the conductor and the geometric size of the power cord, compacted methods are used during stranding, changing the usual circular shape into semi-circular, sectoral, tile-shaped, and compacted circular shapes. This type of conductor is mainly used in power cords. 4. Plastic power cords mainly use extruded solid insulation layers. The deviation in insulation thickness is a major indicator of extrusion process quality. Most product structural dimensions and their deviations are clearly specified in standards. The surface of the plastic insulation layer must be smooth, without defects such as roughness, scorching, or impurities. The cross-section of the insulation layer must be dense and firm, with no visible pinholes or bubbles. 5. Multi-core power cords are generally stranded into a circular shape to ensure form stability and reduce the overall size. The stranding mechanism is similar to conductor stranding, but due to the larger lay length, most use non-back-twist methods. Technical requirements for cabling include: preventing twisting of the cable caused by flipping of shaped insulated cores, and avoiding damage to the insulation layer. Most cables undergo two additional processes during cabling: filling, to ensure the roundness and stability of the cable after cabling; and binding, to prevent the cable core from loosening. 6. To protect the insulated cores from being damaged by armor, appropriate protection is required for the insulation layer. Inner sheaths are divided into extruded inner sheaths (separator sleeves) and wrapped inner sheaths (cushioning layers). Wrapped cushioning layers replace binding tapes and are performed simultaneously with the cabling process. 7. For power cords laid underground that may withstand certain positive pressure during operation, an inner steel tape armor structure can be selected. For power cords laid in environments with both positive pressure and tensile forces (such as in water, vertical shafts, or soil with significant elevation differences), a structure with inner steel wire armor should be selected. 8. The outer sheath is the structural part that protects the insulation layer of the power cord from environmental corrosion. The main functions of the outer sheath are to improve the mechanical strength of the power cord, provide chemical corrosion resistance, moisture proofing, water immersion resistance, and flame retardancy. Depending on the different requirements for the power cord, plastic sheaths are directly extruded using an extruder.

kathrein-werke electrical component reliability

1. Influence of environment on relay reliability: Relays have the highest mean time between failures when operating under GB and SF conditions. 2. Influence of quality grade on relay reliability: The quality grade of a relay has a significant impact on its reliability performance. 3. Influence of contact configuration on relay reliability: The contact configuration of a relay also affects its reliability. Single-throw relays have higher reliability than double-throw relays with the same number of poles, and reliability gradually decreases as the number of poles increases. The mean time between failures for a single-pole single-throw relay is higher than that for a four-pole double-throw relay. 4. Influence of structural type on relay reliability: There are many types of relay structures, and different types affect reliability. 5. Influence of temperature on relay reliability: Relays operate within a certain temperature range. As the temperature rises, the mean time between failures gradually decreases. 6. Influence of switching rate on relay reliability: As the switching rate of the relay increases, the mean time between failures basically shows an exponential downward trend. Therefore, if the circuit design requires a very high switching rate for the relay, careful inspection of the relay is necessary during circuit maintenance to replace it in time. 13. Influence of current ratio on relay reliability: The so-called current ratio is the ratio of the operating load current of the relay to its rated load current. The current ratio has a significant impact on relay reliability. Therefore, loads with higher rated currents should be selected during circuit design to lower the current ratio, ensuring that the reliability of the relay and the entire circuit is not reduced due to fluctuations in operating current.

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