ledscale electrical components, German ledscale models, ledscale prices

ledscale electrical components are fuses capable of multiple operations, known in Japan as permanent fuses. 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 core. The fine pores of the ceramic core are filled with metallic sodium as the fusible element, and the void behind the piston is charged with argon gas to compress the metallic sodium. Under normal operating conditions, current enters from lead terminal A, passes through the metallic sodium within the fine pores of the ceramic core, conducts to the stainless steel housing, and exits via output terminal B. When a short-circuit current passes through the fuse, it rapidly heats the metallic sodium in the fine pores of the ceramic core, causing it to transform from a solid into a high-temperature, high-pressure plasma vapor. The resistivity increases rapidly, thereby strongly limiting the short-circuit current and interrupting it instantaneously. When the interruption is complete, 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.

ledscale electrical component principles

The basic working principle of fiber optic sensors is to guide light from a source through an optical fiber into a modulator. The interaction between the parameter to be measured and the light entering the modulation zone causes changes in the optical properties of the light (such as intensity, wavelength, frequency, phase, and polarization state), resulting in modulated signal light. Measurement is completed by utilizing the influence of the measured quantity on the light transmission characteristics. There are two measurement principles for fiber optic sensors: (1) Principle of intrinsic fiber optic sensors: Intrinsic fiber optic sensors utilize the sensitivity of the optical fiber to environmental changes to convert input physical quantities into modulated optical signals. Their operation is based on the optical modulation effect of the fiber, where transmission characteristics such as phase and light intensity change when external environmental factors like temperature, pressure, electric fields, and magnetic fields vary. Therefore, by measuring changes in light phase and intensity through the fiber, changes in the measured physical quantity can be determined. These sensors are also known as sensitive element type or functional fiber optic sensors. The point-source beam of a laser is expanded into parallel waves and split by a beam splitter into two paths: one reference path and one measurement path. External parameters (temperature, pressure, vibration, etc.) cause changes in fiber length and optical phase, generating different numbers of interference fringes. Counting the lateral movement of these fringes allows measurement of temperature or pressure. (6) Principle of extrinsic fiber optic sensors: Extrinsic fiber optic sensors are measurement systems composed of optical detection elements (sensitive elements), fiber optic transmission circuits, and measurement circuits. Here, the optical fiber serves only as a medium for light propagation, so they are also referred to as non-functional or light-transmitting fiber optic sensors.

ledscale electrical component parameters

The main parameters of a transistor include current amplification factor, dissipation power, frequency characteristics, maximum collector current, maximum reverse voltage, and reverse current. Amplification factor: The DC current amplification factor is also known as the static current amplification factor or DC amplification ratio, which refers to the condition when there is no changing signal input in the static state, and is the ratio of the transistor's collector current to its base current. AC amplification ratio: The AC amplification ratio, also known as the AC current amplification factor or dynamic current amplification factor, refers to the condition in an AC state, and is the ratio of the change in the transistor's collector current to the change in its base current. Dissipation power: Dissipation power is also known as the maximum allowable collector dissipation power PCM, which refers to the maximum collector dissipation power when the transistor parameter changes do not exceed the specified allowable values. Dissipation power is closely related to the transistor's maximum allowable junction temperature and maximum collector current. When using a transistor, its actual power consumption must not exceed the PCM value, otherwise, it will cause damage to the transistor due to overload. When the operating frequency of the transistor exceeds the cutoff frequency, its current amplification factor will decrease as the frequency increases. The maximum oscillation frequency refers to the frequency at which the transistor's power gain drops to 8. Typically, the maximum oscillation frequency of high-frequency transistors is lower than the common-base cutoff frequency, while the characteristic frequency is higher than the common-base cutoff frequency but lower than the common-collector cutoff frequency. Maximum current: The maximum collector current refers to the maximum current allowed to pass through the transistor's collector. Maximum reverse voltage: The maximum reverse voltage refers to the highest working voltage allowed to be applied to the transistor during operation. It includes the collector-emitter reverse breakdown voltage, collector-base reverse breakdown voltage, and emitter-base reverse breakdown voltage. The collector reverse breakdown voltage refers to the condition when the transistor base is open-circuited, The maximum allowable reverse voltage between its collector and emitter. The base reverse breakdown voltage refers to the condition when the transistor emitter is open-circuited, the maximum allowable reverse voltage between its collector and base. The emitter reverse breakdown voltage refers to the condition when the transistor collector is open-circuited, the maximum allowable reverse voltage between its emitter and base. The reverse current between the bases is also known as the collector junction reverse leakage current, referring to the condition when the transistor emitter is open-circuited, the reverse current between the collector and base. The reverse breakdown current between the emitters refers to the condition when the transistor base is open-circuited, the reverse leakage current between its collector and emitter, also known as the penetration current. The smaller this current value, the better the performance of the transistor.

ledscale electrical component parameters

The main characteristic parameters of quartz crystal resonators include nominal frequency, adjustment tolerance, temperature frequency tolerance, equivalent resistance, drive level, load capacitance, shunt capacitance, aging rate, and temperature range. (1) Nominal frequency is the specified center resonance frequency of the resonator under defined conditions. (2) Adjustment tolerance is the maximum deviation of the operating frequency from the nominal frequency at the reference temperature under defined conditions. (3) Temperature frequency tolerance is the allowable deviation from the operating frequency at the reference temperature across the entire operating temperature range under defined conditions. (4) Reference temperature is the specified ambient temperature when measuring quartz crystal resonator parameters. For oven-controlled quartz crystal resonators, it is generally the midpoint of the operating temperature range. (5) Load resonance resistance is the resistance value at the load resonance frequency when the quartz crystal resonator is connected in series with a specified external capacitance. (6) Drive level refers to the effective power consumed by the quartz crystal resonator during operation; it is a measure of the excitation state applied to the quartz crystal element. In practical use, the drive level can be adjusted; strong excitation facilitates oscillation startup, while weak excitation leads to poor frequency stability or even failure to oscillate. (7) Load capacitance is the effective external capacitance that, together with the quartz crystal resonator, determines the load resonance frequency. Load capacitance can be appropriately adjusted according to specific conditions, allowing the resonator's operating frequency to be tuned to the nominal value. (8) Shunt capacitance refers to the static capacitance between the two pins of the quartz crystal resonator. (9) Aging rate refers to the error generated by changes in the quartz crystal over time. (10) Temperature range refers to the allowable variation range of the ambient temperature during operation.

Weidou Intelligent Technology specializes in selling German ledscale connectors, ledscale switches, ledscale relays, ledscale controllers, ledscale plugs, ledscale sensors, ledscale resistors, ledscale capacitors, ledscale buses, ledscale modules, ledscale cables, ledscale power supplies, ledscale interfaces, ledscale gateways, and ledscale circuit breakers. All ledscale products are original imports from Germany. Customers are welcome to inquire and place orders.