FEELTECH electrical components Germany FEELTECH model FEELTECH price

FEELTECH electrical components are fuses that can be operated multiple times, known in Japan as permanent fuses. Immediately after interrupting 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. Glass filler between the stainless steel and the ceramic core provides sealing and reinforces 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 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 output terminal B. When short-circuit current passes through the fuse, it 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 sodium vapor immediately returns to liquid and solid states, while the argon gas pushes the piston again to compress the metallic sodium, re-establishing the circuit connection.

FEELTECH electrical component classification

1. Classification by relay external dimensions: (1) miniature relays, (2) sub-miniature relays, (3) small miniature relays. 2. Classification by relay load: (1) micro-power relays, (2) low-power relays, (3) medium-power relays, (4) high-power relays. 12. Classification by relay protection characteristics: (1) Sealed relays: Relays where contacts and coils are sealed inside a cover by welding or other methods, isolated from the surrounding medium, featuring a low leakage rate. (2) Enclosed relays: Relays where contacts and coils are protected by a cover (non-sealed). (3) Open relays: Relays that do not use a protective cover for contacts and coils. Among the above, electromagnetic relays and reed relays are the most commonly used in electronic fabrication.

FEELTECH electrical component principle

Current levels in power generation, transformation, transmission, distribution, and consumption circuits vary significantly, ranging from a few amperes to tens of thousands of amperes. To facilitate measurement, protection, and control, these currents need to be converted to a more uniform level. Additionally, voltages on lines are generally high, making direct measurement dangerous. Current transformers serve the functions of current transformation and electrical isolation. For analog ammeters, the secondary current of current transformers is mostly in the ampere range. For digital instruments, the sampled signal is generally in the milliampere range. The secondary current of miniature current transformers is in the milliampere range, primarily serving as a bridge between large transformers and sampling. Miniature current transformers are also referred to as "instrument current transformers." (The term "instrument current transformer" also implies precision current transformers with multiple current ratios used in laboratories, generally for extending instrument ranges.) Similar to transformers, current transformers operate based on the principle of electromagnetic induction; however, transformers transform voltage, whereas current transformers transform current. The winding connected to the measured current is called the primary winding; the winding connected to the measuring instrument is called the secondary winding. The ratio of the primary winding current I1 to the secondary winding I7 current is called the actual current ratio K. The current ratio when the current transformer operates at rated current is called the rated current ratio of the current transformer, denoted by Kn.

FEELTECH electrical component applications

Wire and cable products adopted in power systems mainly include overhead bare wires, busbars (busbars), power cables (plastic cables, oil-paper power cables (largely replaced by plastic power cables), rubber-sheathed cables, overhead insulated cables), branch cables (replacing some busbars), magnet wires, and electrical equipment wires and cables for power equipment. Wire and cable products used in information transmission systems mainly include telephone cables, TV cables, electronic cables, RF cables, fiber optic cables, data cables, magnet wires, power communication cables, or other composite cables. Apart from overhead bare wires, almost all other products in this category have applications, but mainly power cables, magnet wires, data cables, and instrument cables.

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