ELEKTRO-KOHLE-KOELN electrical components Germany ELEKTRO-KOHLE-KOELN model ELEKTRO-KOHLE-KOELN price

ELEKTRO-KOHLE-KOELN electrical components are instruments that convert high primary current to low secondary current for measurement based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured. Therefore, the full line current often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instrument and protection circuit is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured, so the full line current often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the coils connected in series with the measuring instrument and protection circuit is very small, and the operating state of the current transformer is close to a short circuit.

ELEKTRO-KOHLE-KOELN electrical component classification

Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multi-strand conductors and insulation layers, used to connect circuits, electrical appliances, etc. Cables can be divided into DC cables and AC cables according to the photovoltaic power station system, and are classified into DC cables and AC cables based on usage and operating environment.

ELEKTRO-KOHLE-KOELN electrical component structure

1. LCD panel: The LCD panel includes polarizing film, glass substrate, black matrix, color filter, protective film, common electrode, alignment layer, liquid crystal layer (liquid crystal, spacers, sealant), capacitor, display electrode, prism layer, and diffuser layer. The polarizing film, also known as a polarizer, is divided into an upper polarizer and a lower polarizer. The polarization functions of the upper and lower polarizers are perpendicular to each other. Their function is like a fence, blocking light wave components perpendicular to the polarizer fence according to requirements, while only allowing light wave components parallel to the fence to pass through. 2. Glass substrate: In liquid crystal displays, glass substrates are divided into upper and lower substrates. Their main function is to hold the liquid crystal material in the space between the two substrates. The material for glass substrates is generally alkali-free borosilicate glass with excellent mechanical properties, heat resistance, and chemical corrosion resistance. For TFT-LCD, one layer of glass substrate is distributed with TFT, while the other layer of glass substrate is deposited with color filters. 3. Black matrix: The black matrix uses highly light-blocking materials to separate the red, green, and blue primary colors in the color filter (to prevent color mixing) and prevent light leakage, thereby helping to improve the contrast of each color block. In addition, in TFT-LCD, the black matrix can also conceal internal electrode traces or thin-film transistors. The color filter, also known as a color filter membrane, functions to produce 3 primary colors of light: red, green, and blue, achieving full-color display for the liquid crystal display. 4. Alignment layer: The alignment layer, also known as an orientation layer or directing layer, functions to allow liquid crystal molecules to achieve uniform arrangement and orientation at the microscopic level. 5. Transparent electrode: Transparent electrodes are divided into common electrodes and pixel electrodes. The input signal voltage is applied between the pixel electrode and the common electrode. Transparent electrodes are usually formed by depositing indium tin oxide (ITO) material on the glass substrate to create a transparent conductive layer. 6. Liquid crystal material: Liquid crystal material acts like a light valve in LCD, controlling the brightness of transmitted light to achieve information display. 7. Driver IC: The driver IC is essentially a set of integrated circuit chip devices used to adjust and control the phase, peak value, frequency, etc., of potential signals on the transparent electrodes, establishing a driving electric field to ultimately realize information display on the liquid crystal. In the LCD panel, active matrix liquid crystal displays are constructed by sealing twisted nematic (TN) type liquid crystal material between two glass substrates. Among them, the upper glass substrate close to the display screen is deposited with red, green, and blue (RGB) tricolor color filters (also known as color filter membranes), a black matrix, and a common transparent electrode. The lower glass substrate (the substrate farther from the display screen) is equipped with thin-film transistor (TFT) devices, transparent pixel electrodes, storage capacitors, gate lines, signal lines, etc. Alignment layers (or orientation layers) are prepared on the inner sides of the two glass substrates to orient the liquid crystal molecules. Liquid crystal material is injected between the two glass substrates, and spacers are distributed to ensure uniform gap thickness. The periphery is bonded with frame sealant for sealing purposes; the common electrodes of the upper and lower glass substrates are connected using silver dot adhesive processes. Polarizers (or polarizing films) are attached to the outer sides of the upper and lower glass substrates, respectively. When a voltage is applied between the pixel transparent electrode and the common transparent electrode, the arrangement state of the liquid crystal molecules changes. At this time, the intensity of incident light passing through the liquid crystal also changes. Liquid crystal displays utilize the optical rotation property of liquid crystal materials combined with electric field control to achieve information display. 8. Backlight module: LCD products are non-emissive electronic devices that do not have inherent light-emitting properties. They rely on the emission of light sources in the backlight module to achieve display performance. Therefore, the brightness of LCD is determined by its backlight module. Thus, the performance of the backlight module directly affects the display quality of the LCD panel. The backlight module includes illumination light sources, reflectors, light guide plates, diffusion sheets, brightness enhancement films (prism sheets), and frames. The backlight modules used in LCD can be mainly divided into two categories: edge-lit backlight modules and direct-lit backlight modules. Mobile phones, laptops, and monitors (15 inches) mainly use edge-lit backlight modules, while LCD TVs mostly use direct-lit backlight module light sources. Cold cathode fluorescent lamps and light-emitting diodes are the main backlights for LCD. 9. Reflector: The reflector, also known as a reflector hood, mainly functions to direct all light emitted by the light source into the light guide plate, minimizing unnecessary loss. 1. Light guide plate: The main function of the light guide plate is to guide light from the side light source to the front of the panel. 11. Prism sheet: The prism sheet, also known as a brightness enhancement film, mainly functions to concentrate scattered light through refraction and total reflection within the film layer, emitting it from the backlight source at a specific angle to achieve a screen brightening effect.12. Diffusion sheet: The main function of the diffusion sheet is to correct the edge-lit light from the backlight module into a uniform surface light source to achieve optical diffusion. Diffusion sheets are divided into upper and lower diffusion sheets. The upper diffusion sheet is located between the prism sheet and the LCD assembly, closer to the display panel. The lower diffusion sheet is located between the light guide plate and the prism sheet, closer to the backlight source.

ELEKTRO-KOHLE-KOELN electrical component characteristics

Sensitivity refers to the ratio of the change in output to the change in input of a sensor under steady-state operating conditions. It is the slope of the output-input characteristic curve. If the relationship between the sensor's output and input is linear, then the sensitivity S is a constant. Otherwise, it will vary with changes in the input. The dimension of sensitivity is the ratio of the dimensions of the output and input quantities. When the dimensions of the sensor's output and input quantities are the same, sensitivity can be understood as the amplification factor. Increasing sensitivity can yield higher measurement precision. However, the higher the sensitivity, the narrower the measurement range, and stability is often poorer.

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