lemp electrical components German lemp models lemp prices

lemp electrical components are devices that convert electrical energy into mechanical energy. They utilize energized coils (i.e., stator windings) to generate a rotating magnetic field, which acts on the rotor (such as a squirrel-cage closed aluminum frame) to form electromagnetic rotational torque. Electric motors are classified into DC motors and AC motors based on the power supply used. Most motors in power systems are AC motors, which can be synchronous or asynchronous (where the stator magnetic field speed does not remain synchronized with the rotor speed). The motor mainly consists of a stator and a rotor. The direction of motion of current-carrying conductors under force in a magnetic field depends on the current direction and the direction of magnetic field lines (magnetic field direction). The working principle of an electric motor is the force exerted by the magnetic field on the current, causing the motor to rotate.

lemp electrical component characteristics

(1) offers a wide transient response range and strong harmonic measurement capability. The quality of transient characteristics is an important parameter for determining whether a transformer can be applied in power systems, particularly regarding coordination with relay protection operating times. Traditional electromagnetic transformers have poor response characteristics to high-frequency signals due to the presence of an iron core and cannot correctly reflect the transient process on the primary side. In contrast, the frequency range of optical current transformers is mainly determined by the electronic circuitry, avoiding iron core saturation issues, thus accurately reflecting the transient process on the primary side. The structure of optical sensors allows for the measurement of harmonics on high-voltage power lines, which is difficult to achieve with electromagnetic induction transformers. (2) Digital interface with strong communication capability: Since optical sensors transmit optical digital signals, they interface easily with communication networks without measurement errors during transmission. With the widespread adoption of microprocessor-based protection and control equipment, optical current transformers can directly provide digital quantities to secondary equipment, eliminating the need for converters and A/D sampling sections in original protection devices. This significantly simplifies secondary equipment and promotes research into new protection principles. (3) Small size, light weight, and easy upgradability meet the requirements for miniaturization and compactness of substations. As optical sensors rely on sensor heads and electronic circuits for signal acquisition and processing, they are compact, with weights generally below 1002 kg, facilitating integration into AIS or GIS. This greatly reduces the footprint of substations, meeting miniaturization and compactness requirements. Additionally, optical current transformers connect to secondary equipment via a small number of optical fibers, significantly reducing cable trenches and cabling.

lemp electrical component composition

A two-terminal electronic component made of resistive material with a specific structural form, used in circuits to limit current flow. Those with unchangeable resistance values are called fixed resistors. Those with variable resistance values are called potentiometers or variable resistors. An ideal resistor is linear, meaning the instantaneous current through the resistor is proportional to the applied instantaneous voltage. Some special resistors, such as thermistors, varistors, and sensitive elements, exhibit a non-linear relationship between voltage and current. Resistors are the most numerous components in electronic circuits, typically available in various series based on power and resistance values for selection by circuit designers. In circuits, resistors are mainly used to adjust and stabilize current and voltage, serving as shunts and voltage dividers, or as matching loads. Depending on circuit requirements, they can also be used for negative or positive feedback in amplifier circuits, voltage-to-current conversion, or as voltage/current protection elements during input overload. They can also form RC circuits to serve as oscillation, filtering, bypass, differentiation, integration, and time constant elements.

lemp electrical component classification

Fuses are classified into high-voltage and low-voltage fuses based on operating voltage. Based on the protected object, they include fuses for transformers and general electrical equipment, voltage transformers, power capacitors, semiconductor components, motors, and household appliances. Structurally, they are classified as open, semi-enclosed, tube-type, and expulsion fuses. Open fuses have a simple structure with the fuse element fully exposed to air, supported by porcelain pillars without bases, suitable for low-voltage outdoor use. Interrupting current generates significant noise and light in the atmosphere. Semi-enclosed fuses have the fuse element mounted on a porcelain frame, inserted into a porcelain box with metal sockets at both ends, suitable for low-voltage indoor use. The porcelain box contains the noise and light generated during current interruption. Tube-type fuses have the fuse element installed inside the fuse body, then inserted into a base or directly connected to the circuit. The fuse link is a fully sealed insulating tube with metal caps or contact blades at both ends. If the insulating tube is filled with quartz sand, it limits current during interruption, greatly increasing breaking capacity, hence also known as high-breaking-capacity fuses. If the tube is evacuated, it is called a vacuum fuse. If the tube is filled with SF6 gas, it is called an SF6 fuse, aimed at improving arc extinction performance. Since quartz sand, vacuum, and SF13 gas all offer good insulation properties, this type of fuse is suitable for both low and high voltages. Expulsion fuses have the fuse element installed in an insulating tube made of solid gas-generating material, such as electrical anti-white cardboard or organic glass. When short-circuit current passes through the fuse element, it melts immediately, creating an arc. The high-temperature arc rapidly decomposes the solid gas-generating material, producing large amounts of high-pressure gas, which expels the ionized gas and arc from both ends of the tube, generating intense noise and light, and extinguishing the arc at the AC current zero crossing to interrupt the current. The insulating tube is usually mounted on an insulating support to form the complete fuse. Sometimes the upper end of the insulating tube is designed to be movable, detaching and dropping after current interruption; this type of expulsion fuse is commonly known as a drop-out fuse.

Weidou Intelligent Technology specializes in selling German lemp connectors, lemp switches, lemp relays, lemp controllers, lemp plugs, lemp sensors, lemp resistors, lemp capacitors, lemp buses, lemp modules, lemp cables, lemp power supplies, lemp interfaces, lemp gateways, and lemp circuit breakers. lemp products are original imports from Germany. Customers are welcome to inquire and order.