kme electrical components Germany kme model kme price

kme electrical components refer to lightning arrestor tubes or antenna switch tubes used for overvoltage protection, which contain two or more electrodes and are filled with a certain amount of inert gas. A gas discharge tube is a gap-type lightning protection component used for lightning protection in communication systems. Gas discharge tubes are gap-type lightning protection components that have been widely applied in the lightning protection of communication systems. Discharge tubes are commonly used in the first or first two stages of multi-stage protection circuits to discharge instantaneous lightning overcurrents and limit overvoltages. Due to the high insulation resistance between the electrodes of the discharge tube and the small parasitic capacitance, they have clear advantages for lightning protection of high-frequency signal lines. The main disadvantage of the protection characteristics of discharge tubes is their large discharge delay and less-than-ideal operating sensitivity, making it difficult to effectively suppress lightning waves with a steep wavefront rise. There is also a follow-current issue in the lightning protection of power systems. Commonly used gas discharge tubes include two-electrode and three-electrode discharge tubes. Their packaging housing materials are mostly ceramic, hence they are called ceramic discharge tubes.

kme electrical component classification

1, classified by operating nature, can be divided into transmitting antennas and receiving antennas. 2, classified by application, can be divided into communication antennas, broadcast antennas, television antennas, radar antennas, etc. 3, classified by directionality, can be divided into omnidirectional antennas and directional antennas, etc. 4, classified by operating wavelength, can be divided into ultra-long wave antennas, long wave antennas, medium wave antennas, short wave antennas, ultra-short wave antennas, microwave antennas, etc. 5, classified by structural form and operating principle, can be divided into wire antennas and aperture antennas, etc. Characteristic parameters describing antennas include radiation pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization, and bandwidth. 6, classified by dimension, can be divided into two types: ① One-dimensional antennas consist of many wires, which are either straight like those used in mobile phones, or have clever shapes, like the old rabbit ear antennas used on televisions before cable appeared. Monopole and dipole antennas are the two most basic one-dimensional antennas. ② Two-dimensional antennas: diverse variations, including patch (a square piece of metal), array (a bundle of patches organized in a two-dimensional pattern), horn, and dish. 8, antennas can be divided into three major categories based on usage scenarios: handheld transceiver antennas, vehicle-mounted antennas, and base station antennas. Handheld transceiver antennas: these are antennas for personal use with handheld walkie-talkies, commonly including rubber antennas and telescopic antennas. Vehicle-mounted antennas: these refer to communication antennas originally designed for installation on vehicles, with suction cup antennas being the most common and widely used. Vehicle-mounted antenna structures also include shortened types, quarter-wavelength, center-loaded, five-eighths wavelength, and half-wave dipole forms. Base station antennas: play a very critical role in the entire communication system, especially as communication hubs for stations. Commonly used base station antennas include fiberglass high-gain antennas, four-ring array antennas (eight-ring array antennas), and directional ant

kme electrical component principle

Photoelectric sensors achieve control by converting changes in light intensity into changes in electrical signals. Generally, a photoelectric sensor consists of three parts: transmitter, receiver, and detection circuit. The transmitter emits a light beam towards the target. The emitted light beam generally comes from semiconductor light sources, such as light-emitting diodes (LED), laser diodes, and infrared emitting diodes. The light beam is emitted continuously, or the pulse width is varied. The receiver consists of photodiodes, phototransistors, and photocells. Optical components such as lenses and apertures are installed in front of the receiver. Behind it is the detection circuit, which filters out valid signals and applies them.

kme electrical component function

The main purposes of disconnect switches (knife switches) are: 1, to isolate the power supply, disconnecting high-voltage maintenance equipment from live equipment, creating a clearly visible break point between them. 2, to coordinate with circuit breakers for switching operations as required by the system's operating mode, thereby changing the system's wiring configuration. 3, to connect or disconnect low-current circuits. Disconnect switches can perform the following operations: make or break bypass currents of closed-loop switches; make or break grounding connections at transformer neutral points, but when an arc-suppression coil is connected to the neutral point, operation is only permitted when the system is fault-free; make or break voltage transformers and lightning arrestors; make or break capacitive currents of busbars and equipment directly connected to the busbars; make or break no-load lines with capacitive currents not exceeding 5 amperes; three-gang disconnect switches can make or break loads with voltages at 10 kilovolts and below, and currents below 25 amperes, etc. When operating disconnect switches, note that when energizing a line, close the busbar-side disconnect switch first, then the line-side disconnect switch, and finally the circuit breaker. When de-energizing a line, open the circuit breaker first, then open the disconnect switch. Do not make or break high-voltage disconnect switches under load.

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