MZUBLIN electrical components Germany MZUBLIN model MZUBLIN price

MZUBLIN electrical components are instruments used to transform voltage. However, the purpose of a transformer in transforming voltage is to facilitate the transmission of electrical energy, so its capacity is large, generally calculated in kilovolt-amperes or megavolt-amperes; whereas the purpose of a voltage transformer in transforming voltage is mainly to supply power to measuring instruments and relay protection devices, to measure the voltage, power, and electrical energy of the line, or to protect valuable equipment, motors, and transformers in the line when a fault occurs. Therefore, the capacity of a voltage transformer is very small, generally only a few volt-amperes or tens of volt-amperes, with a maximum not exceeding one thousand volt-amperes.

MZUBLIN electrical component principle

Its operating principle is the same as that of a transformer, and its basic structure also consists of an iron core and primary and secondary windings. It is characterized by a very small and relatively constant capacity, operating close to no-load conditions during normal operation. The impedance of the voltage transformer itself is very small; once a short circuit occurs on the secondary side, the current will increase sharply and burn out the windings. For this reason, fuses are connected to the primary side of the voltage transformer, and the secondary side is reliably grounded to prevent high potential to ground on the secondary side from causing personal injury and equipment accidents when insulation between the primary and secondary sides is damaged. Voltage transformers for measurement are generally made with a single-phase dual-winding structure. The primary voltage is the voltage to be measured (such as the line voltage of the power system). They can be used in single phase, or two units can be connected in a V-V configuration for three-phase use. Voltage transformers used in laboratories often have multiple taps on the primary side to accommodate the need to measure different voltages. Voltage transformers for protective grounding also include a third winding, known as a three-winding voltage transformer. The third windings of the three phases are connected in an open-delta configuration. The two output terminals of the open delta are connected to the voltage coil of the ground protection relay. During normal operation, the three-phase voltages of the power system are symmetrical, and the sum of the three-phase induced electromotive forces on the third winding is zero. Once a single-phase ground fault occurs, neutral point displacement occurs, and zero-sequence voltage appears between the terminals of the open delta, causing the relay to operate and thus protecting the power system. When zero-sequence voltage appears in the windings, corresponding zero-sequence flux appears in the iron core. Therefore, this type of three-phase voltage transformer uses a side-yoke iron core or employs three single-phase voltage transformers. For this type of transformer, the accuracy requirement for the third winding is not high, but it requires certain over-excitation characteristics (i.e., when the primary voltage increases, the magnetic flux density in the iron core increases by a corresponding factor without damage). Voltage transformers are indispensable electrical devices in power transmission and supply systems such as power plants and substations. Precision voltage transformers are instruments used in electrical testing laboratories to extend measurement ranges and measure voltage, power, and electrical energy. Voltage transformers are very similar to transformers, as both are used to transform voltage on lines. Why is voltage transformation needed on lines? This is because, depending on the different conditions of power generation, transmission, and consumption, the voltage levels on lines vary significantly. Some are low voltages such as 220V and 386V, while others are high voltages of tens of thousands or even hundreds of thousands of volts. To directly measure these low and high voltages, corresponding low-voltage and high-voltage voltmeters and other instruments and relays would need to be manufactured according to the line voltage levels. This would not only create significant difficulties in instrument manufacturing, but more importantly, it is impossible and strictly prohibited to directly manufacture high-voltage instruments and measure voltage directly on high-voltage lines.

MZUBLIN electrical component features

LED lamps are light-emitting diodes, using solid-state semiconductor chips as the light-emitting material. Compared with traditional lamps, LED lamps are energy-saving, environmentally friendly, and offer good color rendering and response speed. (1) Energy saving is the most prominent feature of LED lamps in terms of energy consumption; the energy consumption of LED lamps is one-tenth that of incandescent lamps and one-quarter that of energy-saving lamps. This is the biggest feature of LED lamps. People today advocate energy conservation and environmental protection, and it is precisely because of this energy-saving feature that LED lamps have a wide range of applications and are very popular. (2) Can operate in high-speed switching states. When we walk on the street, we find that every screen or image composed of LED is ever-changing. This indicates that LED lamps can perform high-speed switching operations. However, the incandescent lamps we usually use cannot achieve this working state. In daily life, if the switch is turned on and off too many times, it will directly lead to the breakage of the incandescent lamp filament. This is also an important reason why LED lamps are popular. (3) Environmental protection: LED lamps do not contain any heavy metal materials such as mercury, whereas fluorescent lamps do, which reflects the environmental friendliness of LED lamps. People now attach great importance to environmental protection, so more people are willing to choose environmentally friendly LED lamps. (4) Fast response speed is another prominent feature of LED lamps, meaning they react quickly. As soon as the power is connected, the LED lamp lights up immediately. Compared with the energy-saving lamps we usually use, their response speed is faster. When turning on traditional bulbs, it often takes a long time to illuminate the room, and they only light up after the bulb has completely heated up. (5) Compared with other light sources, LED lamps are "cleaner." The so-called "clean" does not refer to the cleanliness of the lamp surface and interior, but rather that this lamp is a cold light source, does not generate excessive heat, and does not attract insects that are attracted to light and heat. Especially in summer, there are many insects in rural areas. Some insects are naturally heat-loving; incandescent lamps and energy-saving lamps generate heat after being used for a period of time, and this heat is exactly what insects like, making it easy to attract them. This will undoubtedly bring many pollutants to the lamp surface, and insect excrement will make the indoor environment very dirty. However, LED lamps are cold light sources and do not attract insects, thus avoiding insect excrement. Therefore, LED lamps are "cleaner." Semiconductor light-emitting diodes have a wide range of applications, low power consumption, long service life, and are low-carbon and environmentally friendly. The application of semiconductor light-emitting diodes in China is very extensive; many lighting devices in residential homes use semiconductor light-emitting diodes, and most street lights use semiconductor light-emitting diode street lights as the lighting source. Some road lighting fixtures also combine solar technology, saving a large amount of electrical energy. Photodiodes can be divided into gallium aluminum arsenide photodiodes, aluminum gallium phosphide arsenide photodiodes, gallium phosphide photodiodes, and aluminum arsenide photodiodes, among others, based on different materials.

MZUBLIN electrical component features

Most microphones are electret condenser microphones (ECM), a technology with a history of several decades. The working principle of ECM utilizes a polymer diaphragm with permanently isolated charge. Compared with the polymer diaphragm of ECM, MEMS microphones exhibit stable performance at different temperatures and are not affected by temperature, vibration, humidity, or time. Due to strong heat resistance, MEMS microphones can withstand high-temperature reflow soldering without any change in performance. Since the sensitivity change before and after assembly is very small, this can even save audio debugging costs during the manufacturing process. Currently, integrated circuit processes are increasingly widely applied in the manufacturing of sensors and sensor interface integrated circuits. This micro-manufacturing process has the advantages of precision, flexible design, miniaturization, integration with signal processing circuits, low cost, and mass production. A first-order resonant frequency in such a low frequency band will result in extremely uneven frequency response of the microphone within the auditory frequency range, which is unacceptable for microphone applications. When tensile stress exists in the sensitive membrane, its resonant frequency will increase, but at the cost of sacrificing sensitivity. Of course, higher first-order resonant frequencies can be obtained by adjusting the size of the sensitive membrane, but this will still reduce sensitivity. It can be seen that piezoresistive schemes are not suitable for the manufacture of miniature microphones. A feasible solution is to adopt a capacitive scheme to manufacture miniature microphones. The advantage of this method is that all materials used in the integrated circuit manufacturing process can be used for sensor manufacturing. However, it is quite difficult to manufacture micro-microphones using a single-chip process, because the air medium between the two capacitor plates can only have a very small gap. Moreover, due to size limitations, bias voltage is difficult to satisfy in some application scenarios. Based on the above problems, research on capacitive microphones has never ceased. Compared with traditional electret microphones, micro-electromechanical system (MEMS) microphones have advantages such as small size, good heat resistance, good consistency, good stability, high reliability, and anti-radio frequency interference. They can also output digital signals, which is conducive to intelligent development.

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