intercable electrical components German intercable models intercable prices

intercable electrical components are devices that provide detachable (active) connections between optical fibers. They precisely align the end faces of two optical fibers to maximize the coupling of light energy from the transmitting fiber into the receiving fiber, while minimizing the impact on the system caused by their insertion into the optical link. This is the basic requirement for fiber optic connectors. To a certain extent, fiber optic connectors affect the reliability and various performance parameters of optical transmission systems.

intercable electrical components principle

Light-emitting principle of laser diodes: The P-N junction in a laser diode is formed by two doped gallium arsenide layers. It has a planar structure parallel to a mirror at one end (highly reflective surface) and a partially reflective surface at the other. The wavelength of the emitted light is directly related to the length of the cavity. When the P-N junction is forward-biased by an external voltage source, electrons move through the junction and recombine as in a conventional diode. When electrons recombine with holes, photons are released. These photons strike atoms, causing more photons to be released. As the forward bias current increases, more electrons enter the depletion region, leading to the emission of more photons. Eventually, some photons drifting randomly within the depletion region strike the reflective surfaces perpendicularly and are reflected back along their original path. The reflected photons are again reflected from the other end of the junction. This movement of photons from one end to the other occurs continuously multiple times. During photon movement, more atoms release more photons due to the avalanche effect. This process of reflection and generation of increasing numbers of photons produces a very intense laser beam. Each photon generated in the emission process described above is identical to other photons in terms of energy level, phase relationship, and frequency. Therefore, the emission process yields a laser beam of a single wavelength. To generate a laser beam, the current in the laser diode must exceed a certain threshold level. Currents below the threshold level cause the diode to behave as an LED, emitting incoherent light.

intercable electrical components classification

1. Classification by relay physical dimensions: (1) Micro relays, (2) Sub-miniature micro relays, (3) Small micro relays. 2. Classification by relay load: (1) Micro-power relays, (2) Low-power relays, (3) Medium-power relays, (4) High-power relays. 5. Classification by relay protection features: (1) Sealed relays: Relays in which contacts and coils are sealed inside a cover by welding or other methods, isolated from the surrounding medium, resulting in a low leakage rate. (2) Enclosed relays: Relays in which contacts and coils are enclosed (non-sealed) by a housing for protection. (3) Open relays: Relays that do not use a protective cover to protect contacts and coils. Among the above relays, electromagnetic relays and reed relays are the most commonly used in electronic fabrication.

intercable electrical components features

The characteristics of self-resetting fuses include high breaking current capacity, capable of interrupting AC currents and even higher currents. This type of fuse has a very significant current-limiting effect; when the instantaneous current approaches 165 kA, it can rapidly limit the current. The structure of a self-resetting fuse mainly consists of current terminals (also called electrodes), mica glass (filler), insulating tube, fusible element, piston, argon gas, and housing. The housing of the self-resetting fuse is generally made of stainless steel. The stainless steel sleeve is separated from the internal beryllium oxide ceramic insulating tube by mica glass, which serves as both filler and insulator. Self-resetting fuses operate based on the characteristic 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 in the fine holes 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, which sharply increases its resistance, thereby achieving current limiting. At this time, the high pressure generated by the vaporization of the 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-resetting 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 returns to the original value, making it ready for reuse. Wiring of self-resetting 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-resetting fuse is in a low-resistance state, and only a small current flows through the parallel resistor. When a fault occurs in the line, the self-resetting fuse enters a high-resistance state. The parallel resistor absorbs the overvoltage generated and maintains the operating current required for the circuit breaker trip unit, ensuring reliable interruption by the circuit breaker. Therefore, the current interrupted by the circuit breaker is actually the current-limited value of the self-resetting fuse.

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