KVTHERMO electrical components Germany KVTHERMO model KVTHERMO price

KVTHERMO electrical components are devices for detachable (active) connection between optical fibers. They precisely align the end faces of two optical fibers to maximize the coupling of light energy from the transmitting fiber into the receiving fiber, while minimizing the impact on the system due to their insertion in the optical link. This is the basic requirement for fiber optic connectors. To a certain extent, fiber optic connectors affect the reliability and various performance metrics of optical transmission systems.

KVTHERMO electrical component parameters

Important aspects of the optical parameters of LED include: luminous flux, luminous efficacy, luminous intensity, light intensity distribution, and wavelength. 1. Luminous efficacy is the ratio of luminous flux to electrical power, with the unit generally being lm/W. Luminous efficacy represents the energy-saving characteristics of a light source, which is an important indicator for measuring the performance of modern light sources. 2.LED Luminous intensity characterizes the strength of light emission in a specific direction. Since the light intensity of LED varies significantly at different spatial angles, we have studied the light intensity distribution characteristics of LED. This parameter has significant practical implications, directly affecting the minimum viewing angle of LED display devices. For example, in large-color LED displays in stadiums, if the selected LED single-tube distribution range is very narrow, viewers at larger angles relative to the display will see distorted images. Moreover, traffic signal lights also require recognition by people over a wide area. 11. Regarding the spectral characteristics of LED, we mainly examine whether its monochromaticity is excellent, and pay attention to whether the main colors such as red, yellow, blue, green, and white LED are pure. Because in many occasions, such as traffic signal lights, the color requirements are quite strict. However, observations show that some LED signal lights in China emit blue-green light for green and deep red for red. From this phenomenon, it is very necessary and meaningful to conduct specialized research on the spectral characteristics of LED.

KVTHERMO electrical component principle

The basic principle of a multimeter is to use a sensitive moving-coil DC ammeter (microammeter) as the meter head. When a small current passes through the meter head, there will be a current indication. However, the meter head cannot handle large currents, so resistors must be connected in parallel and series with the meter head to shunt or reduce voltage, thereby measuring the current, voltage, and resistance in the circuit. The measurement process of a digital multimeter involves converting the measured quantity into a DC voltage signal via a conversion circuit, then converting the analog voltage into a digital quantity using an analog-to-digital (A/D) converter. It is then counted by an electronic counter, and finally, the measurement result is displayed directly as numbers on the screen. The functions of measuring voltage, current, and resistance in a multimeter are achieved through the conversion circuit part. The measurement of current and resistance is based on voltage measurement, meaning that a digital multimeter is an extension of a digital DC voltmeter. The A/D converter in a digital DC voltmeter converts continuously changing analog voltage quantities over time into digital quantities. The electronic counter then counts these digital quantities to obtain the measurement result, which is displayed by the decoding display circuit. The logic control circuit coordinates the operation of the circuits, completing the entire measurement process sequentially under the action of the clock.

KVTHERMO electrical component features

The characteristics of self-resetting fuses include high breaking current capacity, capable of interrupting AC and even higher currents. This type of fuse has a very significant current-limiting effect; when the instantaneous current reaches close to 169 kA, it can rapidly limit the current. The structure of a self-resetting fuse mainly consists of current terminals (also called electrodes), mica glass (filler), insulating tube, fusible element, piston, argon gas, and housing. The housing of the self-resetting fuse is generally made of stainless steel. The stainless steel sleeve is separated from the internal beryllium oxide ceramic insulating tube by mica glass, which serves as both filler and insulator. Self-resetting fuses operate based on the characteristic of sodium metal, whose resistance increases sharply at high temperatures. Under normal operating conditions, current flows from the left current terminal, through the sodium metal fusible element in the fine holes of the beryllium oxide ceramic insulating tube, to the right current terminal, forming an electrical path. When a short-circuit fault occurs, the short-circuit current heats the sodium metal, vaporizing it into a high-temperature, high-pressure plasma state, causing its resistance to increase sharply, thus achieving current limiting. At this point, the high pressure generated by the vaporized fusible element pushes the piston to move to the right, compressing the argon gas. After the circuit breaker interrupts the short-circuit current limited by the self-resetting fuse, the temperature of the sodium vapor drops, and the pressure decreases accordingly. The previously compressed argon gas condenses back into liquid and solid states, and its resistance value returns to the original value, allowing for reuse. Wiring of self-resetting fuses: They are often used in series with circuit breakers, with an additional resistor connected in parallel to suppress overvoltage during interruption. During normal operation, the self-resetting fuse is in a low-resistance state, and only a small current flows through the parallel resistor. When a fault occurs in the line, the self-resetting fuse enters a high-resistance state. The parallel resistor absorbs the overvoltage generated and maintains the operating current required for the circuit breaker trip unit, ensuring reliable interruption by the circuit breaker. Therefore, the current interrupted by the circuit breaker is actually the current-limited current of the self-resetting fuse.

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