demag electrical components Germany demag model demag price

demag electrical components refer to the aggregate of service equipment provided for a specific group of traffic sources, such as trunk lines, switching devices, control systems, etc. The fundamental research content of traffic theory is to study the relationship among traffic volume, call loss, and bundle capacity; therefore, the bundle is an important basic concept in traffic theory. A traffic source is the service object of the bundle, usually referring to user equipment; broadly speaking, the upper-level equipment is the traffic source for the lower-level equipment. In telephone communication, the traffic source is also called the call source. The number of service devices contained in the bundle is called the bundle capacity. Figure 1 is a schematic diagram of the bundle. The capacity of this bundle is V, and it provides service for N traffic sources. Any traffic source initiating a call can occupy an idle service device in the bundle.

demag electrical component structure

The basic structure of a voltage transformer is very similar to that of a transformer; it also has two windings, one called the primary winding and the other called the secondary winding. Both windings are mounted on or wound around the iron core. There is insulation between the two windings and between the windings and the iron core, ensuring electrical isolation between the two windings and between the windings and the iron core. During operation of the voltage transformer, the primary winding N1 is connected in parallel to the line, and the secondary winding N6 is connected in parallel to instruments or relays. Therefore, when measuring voltage on high-voltage lines, although the primary voltage is very high, the secondary side is low voltage, which ensures the safety of operators and instruments.

demag electrical component features

A solid-state relay is a contactless electronic switch with isolation function. There are no mechanical contact parts during the switching process. Therefore, in addition to having the same functions as electromagnetic relays, solid-state relays also feature logic circuit compatibility, vibration and mechanical shock resistance, unrestricted installation position, good moisture-proof, mildew-proof, and corrosion-resistant performance, excellent performance in explosion-proof and ozone pollution prevention, low input power, high sensitivity, low control power, good electromagnetic compatibility, low noise, and high operating frequency. There are no mechanical parts inside the solid-state relay, and the structure adopts a potting fully sealed method. Therefore, solid-state relays have advantages such as vibration resistance, corrosion resistance, long life, and high reliability. AC solid-state relays adopt zero-crossing triggering technology, have short switching times, and can be applied in higher frequency occasions. Photoelectric isolation is used between the input circuit and the output circuit, input power consumption is very low, there is a protection circuit at the output terminal, and the load capacity is strong.

demag electrical component parameters

The main parameters of a potentiometer include nominal resistance, rated power, resolution, sliding noise, resistance variation characteristic, wear resistance, zero-position resistance, and temperature coefficient. 1. Rated power: The maximum power allowed to be dissipated on the two fixed terminals of the potentiometer is the rated power of the potentiometer. It should be noted that the rated power is not equal to the power between the center tap and the fixed terminal. The rated power of a potentiometer refers to the maximum power allowed to be consumed under long-term continuous load at the specified rated temperature when the atmospheric pressure is 87~107kPa. 2. Nominal resistance: The nominal resistance marked on the product, whose series is similar to that of resistors. 3. Allowable error class: The error range between the measured resistance and the nominal resistance allows errors of 20%, 10%, 5%, 2%, 1% depending on different precision levels. The precision of precision potentiometers can reach 0.1%. 4. Resistance variation law: Refers to the relationship between resistance change and the rotation angle (or sliding travel) of the sliding contact. This relationship can be in any functional form, commonly linear, logarithmic, and reverse logarithmic (exponential). In use, linear potentiometers are suitable as voltage dividers; reverse logarithmic (exponential) potentiometers are suitable as volume controllers in radios, recorders, phonographs, and televisions. If a similar product cannot be found during maintenance, a linear type can be used as a substitute, but a logarithmic type should not be used. Logarithmic potentiometers are only suitable for tone control, etc.

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