L58x72x10 in stock German L58x72x10 electrical components L58x72x10 inventory

L58x72x10 electrical component is a fuse that can be operated multiple times, known in Japan as a permanent fuse. Immediately after interrupting an overload or short-circuit current, the fusible element automatically restores to its original state. The housing is made of austenitic stainless steel, with a beryllium oxide ceramic core embedded in the center. The space between the stainless steel and the ceramic core is filled with glass to seal and secure the ceramic core. Metallic sodium is filled into the fine pores of the ceramic core as the fusible element, and the void behind the piston is filled with argon gas to compress the metallic sodium. Under normal operating conditions, current can enter from the lead terminal A, pass through the metallic sodium in the fine pores of the ceramic core, conduct to the stainless steel housing, and exit via the output terminal B. When a short-circuit current passes through the fuse, the short-circuit current rapidly heats the metallic sodium in the fine pores of the ceramic core, causing it to change from a solid to a high-temperature, high-pressure plasma vapor. The resistivity increases rapidly, thereby strongly limiting the short-circuit current and interrupting the current instantly. When the interruption ends, the metallic sodium vapor immediately returns to liquid and solid states, while the argon gas again pushes the piston to compress the metallic sodium, re-establishing the circuit connection.

L58x72x10 electrical component type

For different applications, the purpose of using varistors, and the voltage/current applied to the varistor, are not the same; therefore, the requirements for the varistor also differ. It is very important to distinguish these differences for correct use. According to the purpose of use, varistors can be divided into two main categories: (1) protection varistors and (2) circuit function varistors. Protection resistors: (1) Distinguish whether it is a varistor for power supply protection or for signal line and data line protection, as they must meet different technical standard requirements. (2) According to the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into AC type and DC type. The aging characteristics of varistors under these two voltage stresses are different. (3) According to the different abnormal overvoltage characteristics withstand by the varistor, varistors can be divided into three types: surge suppression type, high-power type, and high-energy type. 1. Surge suppression type varistor refers to a varistor used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. 2. High-power type varistor refers to a varistor used to absorb continuous pulse groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage appears periodically, and the period is known. The energy value can generally be calculated. The voltage peak is not large, but due to the high frequency of occurrence, the average power is quite high. 9. High-energy type varistor refers to a varistor used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capacity. The protective function of varistors can be repeated many times in most application scenarios, but sometimes they are made into "one-time" protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

L58x72x10 electrical component structure

A generator typically consists of components such as the stator, rotor, end covers, and bearings. The stator is composed of the stator core, winding coils, frame, and other structural parts that fix these components. The rotor consists of the rotor core (or magnetic poles, yoke), windings, retaining rings, centering rings, slip rings, fan, and shaft. The bearings and end covers connect and assemble the stator and rotor of the generator, allowing the rotor to rotate within the stator, cutting magnetic flux lines, thereby generating induced electromotive force. This is led out through terminal blocks and connected to the circuit, producing current.

L58x72x10 electrical component classification

Classification by material: a, wire-wound resistors are made by winding resistance wire. They are manufactured by winding high-resistance alloy wire around an insulating core, coated with a heat-resistant glaze insulation layer or insulating varnish. Wire-wound resistors have a low temperature coefficient, high resistance accuracy, good stability, heat and corrosion resistance, and are mainly used as precision high-power resistors. The disadvantages are poor high-frequency performance and a large time constant. b, carbon composition resistors are formed by pressing carbon and synthetic plastic. c, carbon film resistors are made by depositing a layer of carbon on a ceramic tube, specifically by depositing crystalline carbon on a ceramic rod core. Carbon film resistors are low-cost, stable in performance, have a wide resistance range, and low temperature and voltage coefficients, making them the most widely used resistors at present. d, metal film resistors are made by depositing a layer of metal on a ceramic tube, using vacuum evaporation to deposit alloy material onto the surface of a ceramic rod core. Metal film resistors offer higher accuracy, better stability, lower noise, and a smaller temperature coefficient than carbon film resistors. They are extensively used in instruments and communication equipment. e, metal oxide film resistors are made by depositing a layer of tin oxide on a ceramic tube, forming a layer of metal oxide on an insulating rod. As they are oxides themselves, they are stable at high temperatures, resistant to thermal shock, and have strong load capacity. Classified by application, there are general-purpose, precision, high-frequency, high-voltage, high-resistance, high-power, and resistor networks.

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