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 with the circuit where the current needs to be measured. Therefore, the full current of the line often flows through it. The secondary winding has more turns and is connected in series with measuring instruments 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 instruments and protection circuits 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 with the circuit where the current needs to be measured, so the full current of the line often flows through it. The secondary winding has more turns and is connected in series with measuring instruments 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 instruments and protection circuits 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-strand 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 system of photovoltaic power stations, and are classified into DC cables and AC cables based on usage and operating environment.

ELEKTRO-KOHLE-KOELN electrical component structure

1. Liquid crystal panel: The liquid crystal panel includes a polarizing film, glass substrates, black matrix, color filters, protective film, common electrodes, alignment layer, liquid crystal layer (liquid crystal, spacers, sealant), capacitors, display electrodes, prism layer, and light-diffusing layer. The polarizing film is also known as a polarizer; polarizers are divided into upper and lower polarizers. The polarization functions of the upper and lower polarizers are perpendicular to each other. Their function is like a fence, blocking light wave components as required; for example, they block light wave components perpendicular to the polarizer fence and only allow light wave components parallel to the fence to pass through. 2. Glass substrate: In liquid crystal displays, glass substrates can be divided into an upper substrate and a lower substrate. 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 glass substrate is distributed with TFT, while the other glass substrate is deposited with color filters. 3. Black matrix: The black matrix uses highly light-shielding materials to separate the three primary colors (red, green, and blue) in the color filters (to prevent color mixing) and to 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 wiring or thin-film transistors. Color filters, also known as color filter films, function to generate 3 primary base colors (red, green, and blue), enabling full-color display on the liquid crystal display. 4. Alignment film: The alignment film, also known as an orientation film or directional layer, functions to enable uniform arrangement and orientation of liquid crystal molecules 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 typically formed by depositing indium tin oxide (ITO) material on the glass substrate to create a transparent conductive layer. 6. Liquid crystal material: In LCD, the liquid crystal material acts like a light valve, 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, and other parameters of the potential signals on the transparent electrodes, establishing a driving electric field to ultimately realize information display on the liquid crystal panel. In liquid crystal panels, active-matrix liquid crystal displays are constructed by sealing twisted nematic (TN) liquid crystal material between two glass substrates. The upper glass substrate (closer to the display screen) is deposited with red, green, and blue (RGB) tricolor filters (also known as color filter films), 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 films (or alignment layers) are prepared on the inner sides of both glass substrates to orient the liquid crystal molecules. Liquid crystal material is injected between the two glass substrates, and spacers are dispersed to ensure uniform gap thickness. The periphery is bonded with frame sealant to provide sealing, and the common electrodes of the upper and lower glass substrates are connected using silver dot adhesive technology. 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 alignment state of the liquid crystal molecules changes. Consequently, the intensity of incident light passing through the liquid crystal also changes. Liquid crystal displays leverage the optical rotation property of the liquid crystal material combined with electric field control to achieve information display. 8. Backlight module: LCD products are non-emissive electronic devices that do not possess inherent light-emitting characteristics; they must rely on light emission from the source 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 liquid crystal panel. The backlight module includes illumination sources, reflectors, light guide plates, diffusion sheets, brightness enhancement films (prism sheets), and frames. Backlight modules used in LCD can be mainly classified 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 primary backlight sources for LCD. 9. Reflector: The reflector, also known as a reflection cover, mainly functions to direct all light emitted by the source into the light guide plate, minimizing unnecessary loss as much as possible. 1. Light guide plate: The main function of the light guide plate is to guide light from the side-mounted source toward 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 internal reflection within the film layer, directing it out from the backlight source at specific angles 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 effects. Diffusion sheets are divided into upper and lower diffusion sheets. The upper diffusion sheet is located between the prism sheet and the liquid crystal assembly, closer to the display panel. The lower diffusion sheet is located between the light guide plate and the prism sheet, closer to the light 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 there is a linear relationship between the sensor's output and input, 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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