DALSA electrical components Germany DALSA model DALSA price

DALSA electrical components are detection devices that can sense measured information and convert the sensed information into electrical signals or other required forms of output according to certain rules, to meet the requirements for information transmission, processing, storage, display, recording, and control. The existence and development of sensors give objects senses such as touch, taste, and smell, bringing objects to life; sensors are an extension of human senses. Sensors feature miniaturization, digitization, intelligence, multifunctionality, systematization, and networking. They are the primary link in achieving automatic detection and automatic control. A device or apparatus that can sense a specified measured quantity and convert it into a usable signal according to a certain rule (mathematical function law), usually composed of sensitive elements and conversion elements.

DALSA electrical component classification

Light-emitting diodes can also be divided into ordinary monochrome light-emitting diodes, high-brightness light-emitting diodes, ultra-high-brightness light-emitting diodes, color-changing light-emitting diodes, flashing light-emitting diodes, voltage-controlled light-emitting diodes, infrared light-emitting diodes, and negative-resistance light-emitting diodes. The control modes for LED include constant current and constant voltage. There are various dimming methods, such as analog dimming and PWM dimming. Most LED adopt constant current control, which keeps the LED current stable, is less affected by changes in VF, and can extend the service life of LED lighting fixtures.

DALSA electrical component classification

Classification by operating principle or structural characteristics of relays: (1) Electromagnetic relay: An electrical relay that operates using the attractive force generated between the electromagnet core and the armature by the current in the input circuit. (2) Solid-state relay: A relay where electronic components perform its functions without mechanical moving parts, providing isolation between input and output. (3) Temperature relay: A relay that operates when the ambient temperature reaches a set value. (4) Reed relay: A relay that opens, closes, or switches circuits using the action of reeds sealed in a tube, which serve both as contact springs and part of the magnetic circuit with the armature. (5) Time delay relay: A relay whose output section delays or limits to a specified time before closing or opening the controlled circuit when an input signal is applied or removed. (6) High-frequency relay: A relay used for switching high-frequency and RF lines with minimal loss. (7) Polarized relay: A relay that operates due to the combined effect of a polarizing magnetic field and the magnetic field generated by the control current passing through the control coil. The operating direction of the relay depends on the direction of the current flowing through the control coil. (8) Other types of relays: Such as optical relays, acoustic relays, thermal relays, instrument-type relays, Hall effect relays, differential relays, etc.

DALSA electrical component classification

Fuses can be divided into high-voltage fuses and low-voltage fuses based on the operating voltage. Based on the protected object, they can be classified as fuses for protecting transformers and general electrical equipment, fuses for protecting voltage transformers, fuses for protecting power capacitors, fuses for protecting semiconductor components, fuses for protecting motors, and fuses for protecting household appliances. Based on structure, they can be classified as open, semi-enclosed, cartridge, and expulsion fuses. Open fuses have a simple structure, with the fusible element fully exposed to the air, supported by ceramic pillars without bases, suitable for low-voltage outdoor use. They produce significant noise and light in the atmosphere when interrupting current. Semi-enclosed fuses have the fusible element mounted on a ceramic frame, inserted into a ceramic box with metal sockets at both ends, suitable for low-voltage indoor use. The noise and light produced during current interruption are contained by the ceramic box. In cartridge fuses, the fusible element is installed inside the fuse body. It is then inserted into a base or directly connected to the circuit for use. The fuse element is a fully sealed insulating tube with metal caps or contact blades at both ends. If the insulating tube of this type of fuse is filled with quartz sand, it has a current-limiting effect when interrupting current, greatly improving the breaking capacity, hence it is also called a high-breaking-capacity fuse. 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-extinguishing performance. Since quartz sand, vacuum, and SF15 gas all have good insulation properties, this type of fuse is suitable for both low and high voltage. Expulsion fuses have the fusible element installed in an insulating tube made of solid gas-generating material. The solid gas-generating material can be electrical-grade anti-white cardboard or organic glass material. When short-circuit current passes through the fusible element, it melts immediately, creating an arc. The high-temperature arc rapidly decomposes the solid gas-generating material, producing a large amount of high-pressure gas, which ejects the ionized gas with the arc from both ends of the tube, emitting intense noise and light, and extinguishes the arc when the AC current crosses zero, thereby interrupting 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 immediately after current interruption. This type of expulsion fuse is commonly known as a drop-out fuse.

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