scanstrut electrical components Germany scanstrut model scanstrut price

scanstrut electrical component is a high-power electrical component, also known as a thyristor. It has the advantages of small size, high efficiency, and long service life. In automatic control systems, it can serve as a high-power drive device, enabling low-power control elements to control high-power equipment. It is widely used in AC/DC motor speed control systems, power regulation systems, and servo systems. Thyristors are divided into unidirectional thyristors and bidirectional thyristors. Bidirectional thyristors are also called triac bidirectional thyristors, abbreviated as TRIAC. A bidirectional thyristor is structurally equivalent to two unidirectional thyristors connected in reverse; this type of thyristor has bidirectional conduction capability. Its on/off state is determined by the gate G. Applying a positive pulse (or negative pulse) to the gate G enables forward (or reverse) conduction. The advantages of this device are a simple control circuit and no reverse voltage withstand issue, making it particularly suitable for use as an AC contactless switch.

scanstrut electrical component function

In DC circuits, a capacitor is equivalent to an open circuit. A capacitor is a component capable of storing electric charge and is one of the most commonly used electronic components. Starting with the structure of a capacitor: the simplest capacitor consists of two end plates and an insulating dielectric medium in between (including air). When energized, the plates become charged, forming a voltage (potential difference), but due to the insulating material in between, the entire capacitor does not conduct electricity. However, this situation holds under the premise that the critical voltage (breakdown voltage) of the capacitor is not exceeded. We know that any material is relatively insulating; when the voltage across a material increases to a certain level, the material can conduct electricity. We call this voltage the breakdown voltage. Capacitors are no exception; once a capacitor breaks down, it is no longer an insulator. However, at the secondary school level, such voltages are not encountered in circuits, so capacitors operate below the breakdown voltage and can be regarded as insulators. But in AC circuits, because the direction of current changes over time according to a certain functional relationship, and the charging and discharging process of a capacitor takes time, a changing electric field is formed between the plates, and this electric field is also a function that varies with time. In fact, current passes through the capacitor in the form of an electric field.

scanstrut electrical component principle

In lines for power generation, transformation, transmission, distribution, and consumption, current magnitudes vary significantly, ranging from a few amperes to tens of thousands of amperes. To facilitate measurement, protection, and control, it is necessary to convert these to a more uniform current. Additionally, voltages on lines are generally high, making direct measurement very dangerous. Current transformers serve the functions of current transformation and electrical isolation. For pointer-type ammeters, the secondary current of current transformers is mostly at the ampere level. For digital instruments, the sampled signal is generally at the milliampere level. The secondary current of miniature current transformers is at the milliampere level, primarily serving as a bridge between large transformers and sampling. Miniature current transformers are also referred to as "instrument current transformers." ("Instrument current transformer" 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; transformers transform voltage, whereas current transformers transform current. The winding of the current transformer 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 I8 current of a current transformer is called the actual current ratio K. The current ratio when a current transformer operates at rated current is called the rated current ratio of the current transformer, denoted by Kn.

scanstrut electrical component structure

For rubber and plastic power cables, copper cores are preferred for power, lighting, and internal installation of electrical equipment; compacted stranded cores are advisable for large-cross-section conductors. Conductors for fixed installations generally adopt Class 1 or Class 2 conductor structures. Insulation materials generally include four types: natural styrene-butadiene rubber, polyvinyl chloride (PVC), polyethylene, and nitrile-PVC compounds. Heat-resistant power cables use PVC with a temperature resistance of 90 °C. Sheath materials generally include five types: PVC, cold-resistant PVC, ant-termite PVC, black polyethylene, and neoprene rubber. Black polyethylene and neoprene sheathed power cables are suitable for extreme cold resistance and outdoor overhead laying. In environments with external forces, corrosion, or humidity, power cables with rubber or plastic sheaths can be used. Rubber and plastic flexible power cables use copper cores with a flexible structure, consisting of multiple single wires twisted together; flexible conductors generally adopt Class 5 or Class 6 conductor structures. Insulation materials generally include natural styrene-butadiene rubber, PVC, or soft polyethylene plastic. The cabling lay ratio multiplier is small. The outer protective layer uses cotton yarn braiding to prevent overheating and damage to the insulation layer. To facilitate use and simplify production processes, a three-core balanced structure is adopted, saving production labor hours and improving production efficiency. For shielded insulated power cables, tinning of conductor cores is permitted in certain occasions; the surface coverage density of the shielding layer must comply with standards or meet user requirements; the shielding layer should be braided or wrapped with tinned copper wires; if an extruded sheath is added outside the shield, the shield may use soft round copper wire braiding or wrapping. To prevent internal interference between cores or pairs, individual phase shielding structures for each core (or pair) can be produced. General-purpose rubber-sheathed rubber power cables use copper flexible wire bundles with a flexible structure; paper wrapping is permitted on the surface of large cross-sections to improve bending performance. Insulation uses natural styrene-butadiene rubber, which has good aging performance. Rubber for outdoor products uses neoprene or a neoprene-dominated mixed rubber formula. Mining rubber power cables use copper cores with a flexible structure, consisting of multiple single wires twisted together; flexible conductors generally adopt Class 5 or Class 7 conductor structures. Insulation materials generally use rubber. The cabling lay ratio multiplier is small. Many products use metal braiding to equalize the electric field and improve the sensitivity display of insulation status. They have a thicker outer sheath, and color coding is applied underground in mines to help construction personnel understand the different voltage levels of the rubber power cables.

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