103044813 in stock. German 103044813 electrical components. 103044813 inventory.

103044813 electrical components include resistors, capacitors, inductors, diodes, transistors, FETs, thyristors, transformers, relays, sensors, etc. Electronic devices include analog circuits (operational amplifiers, comparators, signal conditioners), logic circuits (flip-flops, counters, decoders, registers, transceivers, NOT gates, AND gates, OR gates, NAND gates, NOR gates, XOR gates), microcontrollers, memory, digital potentiometers, signal conversion circuits (A/D converters, D/A converters, voltage-to-frequency converters), communication circuits (various interface circuits), and monitoring/reset circuits (power supply monitoring, program monitoring)... too numerous to list.

103044813 Electrical Component Classification

Circuit breakers are classified by number of poles: single-pole, two-pole, three-pole, and four-pole. By installation method: plug-in, fixed, and draw-out types.

103044813 Electrical Component Principles

Its operating principle is the same as that of a transformer, with a basic structure consisting of an iron core and primary and secondary windings. It is characterized by very small and relatively constant capacity, operating close to no-load conditions during normal operation. The impedance of the voltage transformer itself is very small; once a short circuit occurs on the secondary side, the current will increase sharply and burn out the coil. Therefore, fuses are connected to the primary side of the voltage transformer, and the secondary side is reliably grounded to prevent high potential to ground on the secondary side in case of insulation damage between the primary and secondary sides, which could cause personal injury and equipment accidents. Voltage transformers for measurement are generally made with a single-phase dual-coil structure. The primary voltage is the voltage to be measured (such as the line voltage of the power system). They can be used singly or two units can be connected in V-V configuration for three-phase use. Voltage transformers for laboratory use often have multiple taps on the primary side to meet the needs of measuring different voltages. Voltage transformers for protective grounding also have a third coil, known as a three-coil voltage transformer. The third coils of the three phases are connected in an open-delta configuration. The two terminals of the open delta are connected to the voltage coil of the ground protection relay. During normal operation, the three-phase voltages of the power system are symmetrical, and the sum of the three-phase induced electromotive forces on the third coil is zero. Once a single-phase ground fault occurs, the neutral point shifts, and zero-sequence voltage appears between the terminals of the open delta, causing the relay to operate, thereby protecting the power system. When zero-sequence voltage appears in the coil, corresponding zero-sequence flux appears in the iron core. Therefore, this type of three-phase voltage transformer uses a side-yoke iron core or three single-phase voltage transformers. For this type of transformer, the accuracy requirement for the third coil is not high, but it requires certain over-excitation characteristics (i.e., when the primary voltage increases, the magnetic flux density in the iron core increases by a corresponding factor without damage). Voltage transformers are indispensable electrical appliances in power transmission and distribution systems such as power plants and substations. Precision voltage transformers are instruments used in electrical testing laboratories to expand measurement ranges for measuring voltage, power, and energy. Voltage transformers are very similar to transformers; both are used to transform voltage on lines. Why is voltage transformation needed on lines? This is because, depending on the different conditions of power generation, transmission, and consumption, the voltage on lines varies greatly, with significant differences. Some are low voltage 220V and 380V, while others are high voltage, ranging from tens of thousands to even hundreds of thousands of volts. To directly measure these low and high voltages, corresponding low-voltage and high-voltage voltmeters and other instruments and relays would need to be manufactured according to the line voltage levels. This would not only bring great difficulties to instrument manufacturing, but more importantly, it is impossible and absolutely prohibited to directly manufacture high-voltage instruments and measure voltage directly on high-voltage lines.

103044813 Electrical Component Applications

Photoelectric sensors using photoelectric elements as sensitive components are diverse and widely used. According to the nature of the output of photoelectric sensors, they can be divided into two categories: (1) Photoelectric measuring instruments that convert the measured quantity into a continuously changing photocurrent. These can be used to measure physical quantities such as light intensity, object temperature, light transmittance, displacement, and surface condition. Examples include lux meters for measuring light intensity, photoelectric pyrometers, photoelectric colorimeters and turbidimeters, photoelectric alarms for fire prevention, and automatic inspection devices and instruments for checking the diameter, length, ovality, and surface roughness of processed parts, all of which use photoelectric elements as sensitive components. Semiconductor photoelectric elements are not only widely used in civil industrial fields but also hold an important position in military applications. For example, lead sulfide photoresistors can be used to make infrared night vision devices, infrared cameras, and infrared navigation systems; (12) Converting the measured quantity into a continuously changing photocurrent. Various photoelectric automatic devices are made using the characteristic of photoelectric elements outputting "present" or "absent" electrical signals when exposed to light or in darkness. Photoelectric elements are used as switching photoelectric conversion elements. Examples include photoelectric input devices for electronic computers, switching temperature regulation devices, and digital photoelectric tachometers for speed measurement.

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