Huber & Suhner electrical components, German Huber & Suhner models, Huber & Suhner prices

Huber & Suhner electrical components are devices that convert alternating current to direct current, and can be used in power supply units and for detecting radio signals, etc. Rectifiers can be made from vacuum tubes, ignitrons, solid-state silicon semiconductor diodes, mercury arcs, etc. Conversely, a device that converts direct current to alternating current is called an "inverter". In standby UPS, only battery charging is required, not power supply to the load, so there is only a charger. In double-conversion UPS, this device supplies power to the inverter and also charges the battery, so it is called a rectifier/charger. A rectifier is a rectification device; simply put, it is a device that converts AC to DC. It has two main functions: first, to convert AC to DC, which is then filtered and supplied to the load or to the inverter; second, to provide charging voltage to the battery. Therefore, it also acts as a charger.

Huber & Suhner electrical component features

The characteristics of self-restoring 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 166 kA, it can rapidly limit the current. The structure of a self-restoring fuse mainly consists of current terminals (also called electrodes), mica glass (filler), insulating tube, fusible element, piston, argon gas, and housing. Among these, the housing of the self-restoring fuse is generally made of stainless steel, with mica glass separating the stainless steel sleeve from the internal beryllium oxide ceramic insulating tube; mica glass serves as both filler and insulator. Self-restoring fuses operate based on the property 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 within the fine pores of the beryllium oxide ceramic insulating tube, to the right current terminal, forming a current 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, thereby achieving current limiting. At this point, the high pressure generated by the vaporized fusible element pushes the piston to the right, compressing the argon gas. After the circuit breaker interrupts the short-circuit current limited by the self-restoring 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 decreases to the original value, allowing for reuse. Regarding the wiring of self-restoring 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-restoring fuse is in a low-resistance state, and only a small current flows through the parallel resistor. When a line fault occurs, the self-restoring fuse enters a high-resistance state, and the parallel resistor absorbs the resulting overvoltage and maintains the operating current required for the circuit breaker trip unit, ensuring reliable breaking by the circuit breaker. Therefore, the current interrupted by the circuit breaker is actually the current-limited value of the self-restoring fuse.

Huber & Suhner electrical component characteristics

The most important characteristic of a diode is its unidirectional conductivity. In a circuit, current can only flow into the anode of the diode and out of the cathode. 1. Forward characteristics: In electronic circuits, when the anode of a diode is connected to a high potential and the cathode to a low potential, the diode conducts. This connection method is called forward bias. It must be noted that when the forward voltage applied across the diode is very small, the diode still does not conduct, and the forward current flowing through it is very weak. Only when the forward voltage reaches a certain value can the diode truly conduct. After conduction, the voltage across the diode remains basically constant, known as the "forward voltage drop" of the diode. 6. Reverse characteristics: In electronic circuits, when the anode of a diode is connected to a low potential and the cathode to a high potential, almost no current flows through the diode, and the diode is in a cutoff state. This connection method is called reverse bias. When a diode is reverse-biased, a weak reverse current, known as leakage current, still flows through it. When the reverse voltage across the diode increases to a certain value, the reverse current increases sharply, and the diode loses its unidirectional conductivity. This state is called diode breakdown. The injection current of a laser diode must be greater than the critical current density to satisfy the population inversion condition and emit laser light. The critical current density is related to the junction temperature and indirectly affects efficiency. During high-temperature operation, the critical current increases, efficiency decreases, and the component may even be damaged.

Huber & Suhner electrical component principles

Based on different intended uses, various types of thermometers have been designed and manufactured. The design principles include: the thermal expansion and contraction of solids, liquids, and gases under temperature influence; the change in pressure of a gas (or vapor) at constant volume due to temperature differences; the thermoelectric effect; the variation of electrical resistance with temperature; and the influence of thermal radiation. 1. Gas thermometer: Hydrogen or helium is often used as the temperature-sensing medium because their liquefaction temperatures are very low, close to absolute zero, resulting in a wide measurement range. This type of thermometer offers high accuracy and is commonly used for precision measurements. 2. Resistance thermometer: Divided into metal resistance thermometers and semiconductor resistance thermometers, both are made based on the characteristic that electrical resistance changes with temperature. Metal thermometers mainly use pure metals such as platinum, gold, copper, and nickel, as well as rhodium-iron and phosphor bronze alloys; semiconductor thermometers mainly use carbon, germanium, etc. Resistance thermometers are convenient and reliable, and are widely used. 3. Thermocouple thermometer: A temperature-measuring instrument widely used in industry. It is made using the thermoelectric effect. Two different metal wires are welded together to form the measuring junction, while the other ends are connected to a measuring instrument to form a circuit. When the measuring junction is placed at the temperature to be measured, a difference in temperature between the measuring junction and the reference junction generates an electromotive force, causing current to flow through the loop. By measuring electrical quantities and knowing the temperature at one point, the temperature at another point can be determined. It is suitable for applications involving large temperature differences between two substances and is often used for high-temperature and cryogenic measurements. 4. Dial thermometer: A thermometer shaped like an instrument panel, also known as a room thermometer, used to measure ambient temperature. It is made based on the principle of thermal expansion and contraction of metals. It uses a bimetallic strip as the sensing element to control the pointer. The bimetallic strip is typically made by riveting a copper strip and an iron strip together, with the copper strip on the left and the iron strip on the right. Since copper exhibits significantly greater thermal expansion and contraction than iron, when the temperature rises, the copper strip pulls the iron strip to bend to the right, causing the pointer to deflect to the right (indicating high temperature); conversely, when the temperature drops, the pointer deflects to the left under the action of the bimetallic strip. 5. Glass tube thermometer: Glass tube thermometers measure temperature based on the principle of thermal expansion and contraction. Due to differences in the expansion coefficients, boiling points, and freezing points of the sensing media, common glass tube thermometers mainly include kerosene thermometers, mercury thermometers, and red ink thermometers. Their advantages are simple structure, ease of use, relatively high measurement accuracy, and low cost. The disadvantages are that the measurement range and accuracy are limited by the quality of the glass and the properties of the sensing medium. Additionally, they cannot transmit signals over long distances and are fragile. 6. Pressure thermometer: Pressure thermometers use the volume expansion or pressure change of liquid, gas, or saturated vapor in a sealed container upon heating as the measurement signal. Its basic structure consists of three parts: a temperature bulb, a capillary tube, and an indicator gauge. The advantages of pressure thermometers are: simple structure, high mechanical strength, and resistance to vibration. They are low-cost and do not require an external power source. The disadvantages are: limited temperature measurement range; significant heat loss and slow response time. 12. Mercury thermometer is a type of expansion thermometer and can only be used as a local monitoring instrument. Using it to measure temperature is not only simple and intuitive but also helps avoid errors associated with remote transmission thermometers.

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