Gewiss electrical components German Gewiss models Gewiss prices

Gewiss electrical components are a common type of low-current master control device. They utilize the collision of moving parts of production machinery to actuate their contacts, thereby making or breaking control circuits to achieve specific control objectives. Typically, such switches are used to limit the position or travel of mechanical motion, causing the moving machinery to automatically stop, reverse, change speed, or perform automatic reciprocating motion at predetermined positions or travel limits. In electrical control systems, the role of position switches is to implement sequence control, positioning control, and detection of position status. They are used for travel control and limit protection of mechanical equipment. Structure: Composed of an operating head, contact system, and housing. In actual production, limit switches are installed at pre-arranged positions. When a module mounted on the moving parts of the production machinery strikes the limit switch, the contacts of the limit switch actuate, achieving circuit switching. Therefore, a limit switch is an electrical device that switches circuits based on the travel position of moving parts; its operating principle is similar to that of a pushbutton. Limit switches are widely used in various machine tools and lifting machinery to control their travel and provide terminal limit protection. In elevator control circuits, limit switches are also used to control the speed of opening and closing car doors, provide automatic door opening/closing limit protection, and provide upper and lower limit protection for the car.

Gewiss electrical component functions

Low-power resistors are typically composed of carbon film encapsulated in a plastic housing, while high-power resistors are typically wirewound resistors, made by winding metal wire with high resistivity around a ceramic core. If a resistor's resistance value is close to zero ohms (for example, a large-cross-section wire between two points), the resistor offers no obstruction to current, the circuit paralleled with such a resistor is short-circuited, and the current becomes infinitely large. If a resistor has infinite or very high resistance, the circuit connected in series with that resistor can be regarded as an open circuit, and the current is zero. Resistors commonly used in industry fall between these two extremes; they possess a certain resistance and allow a certain amount of current to pass, but the current is not as large as in a short circuit. The current-limiting effect of a resistor is similar to the effect of a small-diameter pipe restricting water flow between two large-diameter pipes. Resistance, usually abbreviated as R, is a fundamental property of a conductor, related to the conductor's dimensions, material, and temperature. Ohm's law states that I = U/R, therefore R = U/I. The basic unit of resistance is the ohm, represented by the Greek letter "Ω". It is defined as the resistance value corresponding to a current of one ampere generated when a voltage of one volt is applied across a conductor. The main function of a resistor is to obstruct the flow of current. In fact, "resistance" refers to a property, whereas "resistor" in electronic products usually refers to the component itself. Ohm is often abbreviated as Oh. Common units for expressing resistance values include kiloohm (kΩ), megaohm (MΩ), and milliohm (m Ω).

Gewiss electrical component parameters

Key technical parameters of solid-state relays include: input voltage range, input current, turn-on voltage, turn-off voltage, reverse polarity voltage, rated output current, rated output voltage, output voltage, output leakage current, turn-on time, turn-off time, zero-crossing voltage, maximum surge voltage, electrical system peak, voltage rate of rise, operating temperature, ambient temperature range, dielectric withstand voltage, insulation resistance, electrical system peak, turn-off time, conduction time, output terminal leakage current, maximum on-state voltage transient overvoltage, maximum zero-crossing conduction voltage, power consumption, maximum surge current, minimum load current, maximum load current, output voltage range, minimum input impedance, reverse polarity voltage, input current, guaranteed turn-off voltage, guaranteed turn-on voltage, and input voltage range.

Gewiss electrical component composition

Transformer components include the core assembly (core, windings, insulation, leads), transformer oil, tank and cooling device, voltage regulation device, protective devices (breather, safety air duct, gas relay, oil conservator, and temperature measuring device, etc.), and outlet bushings. Specific composition and functions: (1) The core is the main magnetic circuit part of the transformer. It is typically made by stacking hot-rolled or cold-rolled silicon steel sheets with high silicon content and coated with insulating varnish. The core is divided into two parts: the core column and the yoke. The core column is fitted with windings; the yoke is used to close the magnetic circuit. (2) The windings are the circuit part of the transformer, wound using double-silk-insulated flat wire or enamel-insulated round wire. The basic principle of a transformer is electromagnetic induction. Taking a single-phase two-winding transformer as an example to explain its basic working principle: when voltage is applied to the primary winding, current flows, generating alternating magnetic flux in the core. This flux is called the main magnetic flux. Under its influence, electromotive force is induced in the windings on both sides, finally driving the transformer control device.

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