dometic electrical components German dometic models dometic prices

dometic electrical components are a new type of contactless switching device composed entirely of solid-state electronic components. It utilizes the switching characteristics of electronic components (such as switching transistors, triacs, and other semiconductor devices) to achieve contactless and spark-free connection and disconnection of circuits, hence it is also called a "contactless switch". A solid-state relay is a four-terminal active device, where two terminals are input control terminals and the other two are output controlled terminals. It has both amplification drive and isolation functions, making it very suitable for driving high-power switching actuators. Compared to electromagnetic relays, it offers higher reliability, is contactless, has a long service life, fast speed, and low external interference, and has been widely used [1].

dometic electrical component classification

1. By application: pressure-sensitive and force-sensitive sensors, position sensors, level sensors, energy consumption sensors, speed sensors, acceleration sensors, radiation sensors, thermal sensors. 2. By principle: vibration sensors, humidity-sensitive sensors, magnetic-sensitive sensors, gas-sensitive sensors, vacuum degree sensors, biosensors, etc. 3. By output signal: (1) Analog sensors can convert the measured non-electrical quantity into an analog electrical signal. (2) Digital sensors: convert the measured non-electrical quantity into a digital output signal (including direct and indirect conversion). (3) Pseudo-digital sensors: convert the measured signal quantity into a frequency signal or short-period signal output (including direct or indirect conversion). (4) Switch sensors: when a measured signal reaches a specific threshold, the sensor outputs a set low-level or high-level signal accordingly. 4. By manufacturing process: Integrated sensors are manufactured using standard production processes for silicon-based semiconductor integrated circuits. Usually, part of the circuit for preliminary processing of the measured signal is also integrated on the same chip. Thin-film sensors are formed by depositing thin films of corresponding sensitive materials on a dielectric substrate (base plate). When using hybrid processes, part of the circuit can also be fabricated on this substrate. Thick-film sensors are made by coating slurry of corresponding materials onto ceramic substrates, usually made of alumina, followed by heat treatment to form the thick film. Ceramic sensors are produced using standard ceramic processes or their variants (sol-gel, etc.). After appropriate preparatory operations, the formed elements are sintered at high temperatures. There are many common characteristics between thick-film and ceramic sensor processes; in some aspects, thick-film technology can be considered a variant of ceramic technology. Each process technology has its own advantages and disadvantages. Due to lower capital investment required for research, development, and production, as well as the high stability of sensor parameters, it is more reasonable to use ceramic and thick-film sensors. 5. By measurement purpose: Physical sensors are made utilizing the characteristic that certain physical properties of the measured substance undergo significant changes. Chemical sensors are made using sensitive elements that can convert chemical quantities such as composition and concentration of chemical substances into electrical quantities. Biological sensors are made using various biological or biomaterial characteristics to detect and identify chemical components in living organisms. 6. By structure: (1) Basic sensors are the most fundamental single transformation devices. (2) Combined sensors are sensors constructed by combining different single transformation devices. (3) Application-specific sensors are sensors constructed by combining basic or combined sensors with other mechanisms. 13. By mode of action: Sensors can be divided into active and passive types based on their mode of action. Active sensors include acting and reacting types. Such sensors can emit a certain detection signal to the object being measured, detect changes produced by the detection signal in the object, or form a signal by producing a certain effect in the object via the detection signal. Those detecting changes in the detection signal are called acting type, while those detecting responses to form signals are called reacting type. Radar and radio frequency range detectors are examples of acting type, while photoacoustic effect analysis devices and laser analyzers are examples of reacting type. Passive sensors only receive signals generated by the object itself, such as infrared radiation thermometers and infrared imaging devices.

dometic electrical component principles

A transformer is a device that changes AC voltage using the principle of electromagnetic induction. Its main components are the primary coil, secondary coil, and iron core (magnetic core). In electrical equipment and wireless circuits, it is commonly used for stepping up/down voltage, impedance matching, safety isolation, etc. In generators, whether the coil moves through a magnetic field or the magnetic field moves through a fixed coil, an electromotive force can be induced in the coil. In both cases, the value of magnetic flux remains unchanged, but the amount of magnetic flux linking with the coil varies, which is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current, and impedance.

dometic electrical component characteristics

The main characteristics of circuit breakers include: rated voltage; rated current; trip current setting range for overload protection and short-circuit protection; rated short-circuit breaking current, etc. Rated ultimate short-circuit breaking capacity refers to the ability of a low-voltage circuit breaker to operate normally again after breaking the maximum three-phase short-circuit current at its output terminal, and to break this short-circuit current once more. The circuit breaker does not guarantee whether it can normally connect and disconnect thereafter; whereas rated operational short-circuit breaking capacity refers to the ability of the circuit breaker to break normally multiple times when the maximum three-phase short-circuit current occurs at its output terminal. Rated operational short-circuit breaking capacity is a breaking current value smaller than the rated ultimate short-circuit breaking current. Generally speaking, circuit breakers with three-stage protection functions—long-time delay for overload, short-time delay for short-circuit, and instantaneous action for short-circuit—can achieve selective protection. Most main lines (including the output terminals of transformers) use them as main protection switches. Circuit breakers without short-time delay for short-circuit function (only having long-time delay for overload and instantaneous action for short-circuit, i.e., two-stage protection) cannot provide selective protection and can only be used in branch circuits. "Marine Electrical Engineering" points out: For circuit breakers with three-stage protection, emphasis is placed on their operational short-circuit breaking capacity value, while for circuit breakers used in branch lines, sufficient ultimate short-circuit breaking capacity value should be ensured. A common bias is to prefer larger values rather than appropriately sized ones, believing that larger is safer. However, choosing excessively large values causes unnecessary waste. Therefore, there is no need for circuit breakers on branch lines to blindly pursue high operational short-circuit breaking capacity indicators. For circuit breakers used on main lines, they must not only meet the requirements for rated ultimate short-circuit breaking capacity but also satisfy the requirements for rated operational short-circuit breaking capacity. A circuit breaker is a basic low-voltage electrical appliance with overload, short-circuit, and undervoltage protection functions, capable of protecting lines and power sources. The main technical indicators are rated voltage and rated current. Circuit breakers have different functions depending on the application, with many varieties and specifications, and numerous specific technical indicators. Free tripping of circuit breakers: At any moment during the closing process of a circuit breaker, if the protective action connects the tripping circuit, the circuit breaker can reliably disconnect completely. This is called free tripping. Circuit breakers with free tripping ensure that they can quickly disconnect when a short-circuit fault occurs during closing, thereby avoiding the expansion of accident scope.

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