olympus electrical components Germany olympus model olympus price

olympus electrical components utilize the good conductivity and fluidity of mercury to control the opening and closing of electrical circuits. They consist of a glass tube, mercury, fixed electrodes, lead wires, etc. After evacuating the air from the tube, it is filled with various gases and sealed. It is suitable for environments with dust, oil, water vapor, corrosive gases, and can also be used as an explosion-proof switch in places with explosive gases. Given the high surface tension and specific gravity of the mercury inside the tube, and its rich fluidity, as long as the glass tube is slightly tilted, the position of the mercury changes immediately, and contacts the electrodes via surface contact, thus enabling the switching of high AC and DC currents. In addition, the characteristics of this switch include a lifespan of several million cycles at rated current, small size, high sensitivity, no mechanical noise, and low price, so it has always been used as a switch for automatic control.

olympus electrical component composition

1. A general fuse consists of three parts: first, the fusible element part, which is the core of the fuse and serves to cut off the current when it melts. For fuses of the same type and specification, the fusible elements must have the same material, identical geometric dimensions, resistance values as small and consistent as possible, and most importantly, consistent fusing characteristics. Household fuses are commonly made of lead-antimony alloy; second, the electrode part, usually two, which is an important component connecting the fusible element to the circuit. It must have good conductivity and should not produce significant installation contact resistance; third, the bracket part. The fusible element of a fuse is generally thin and soft. The role of the bracket is to fix the fusible element and make the three parts a rigid whole for easy installation and use. It must have good mechanical strength, insulation, heat resistance, and flame retardancy, and should not exhibit phenomena such as breakage, deformation, combustion, or short circuits during use. 2. Arc extinguishing device: Fuses used in power circuits and high-power equipment not only have the three parts of a general fuse but also an arc extinguishing device. This is because the circuits protected by such fuses not only have larger operating currents, but also very high voltages across the ends when the fusible element melts. Often, the fusible element has melted (fused) or even vaporized, but the current has not been cut off. The reason is that at the moment of fusing, arcing occurs between the two electrodes of the fuse under the action of voltage and current. This arc extinguishing device must have strong insulation and good thermal conductivity, and be negatively charged. Quartz sand is a commonly used arc extinguishing material. 7. Fusing indication device: Some fuses have a fusing indication device. Its function is to cause a certain change in appearance after the fuse operates (melts), making it easy for maintenance personnel to detect, such as glowing, changing color, or popping out a solid indicator.

olympus electrical component principle

When a high-frequency current passes through a conductor, an electric field and a magnetic field are generated in the surrounding space. According to the distribution characteristics of the electromagnetic field in space, it can be divided into the near zone, intermediate zone, and far zone. Let R be the distance from a point in space to the conductor. The region where R ﹤﹤ λ/2π is called the near zone. In this zone, the electromagnetic field is closely related to the current and voltage in the conductor. The region where R﹥﹥λ/2π is called the far zone. In this region, the electromagnetic field can leave the conductor and propagate into space. Its changes lag behind the current and voltage on the conductor by a period of time. At this point, the propagated electromagnetic wave is no longer directly related to the current and voltage on the wire. The electromagnetic field in this region is called the radiation field. It must be pointed out that when the length of the wire L is much smaller than the wavelength λ, the radiation is very weak; when the length of the wire L increases to be comparable to the wavelength, the current on the wire will increase significantly, thereby forming stronger radiation. Transmitting antennas utilize this property of the radiation field, allowing the transmitted signal to radiate fully into space after passing through the transmitting antenna. How to make a conductor an effective radiating system? Here we first analyze the situation on the transmission line. On a parallel two-wire transmission line, to ensure only energy transmission without radiation, it is necessary to ensure the symmetry of the two-wire structure, with currents at corresponding points on the line being equal in magnitude and opposite in direction, and the distance between the two wires<π. To effectively radiate the electromagnetic field, this symmetry of the transmission line must be broken. Methods such as separating the two conductors at a certain angle or removing one side can destroy the conductor symmetry and produce radiation. Separating the open-circuit transmission or the conductor at a distance of π/4 from the terminal in a straight manner, the current on the terminal conductor is no longer in anti-phase but in phase, causing the radiation fields of this conductor segment at spatial points to superimpose in phase, constituting an effective radiation system. This is the simplest and most basic unit antenna, called a half-wave symmetric dipole antenna, with a characteristic impedance of 83Ω. After electromagnetic waves are radiated from the transmitting antenna, they propagate in all directions. If a symmetric dipole is placed in the direction of electromagnetic wave propagation, an induced electromotive force will be generated on the antenna dipole under the action of the electromagnetic wave. If the antenna is connected to receiving equipment at this time, a high-frequency current will be generated at the input end of the receiving equipment. Thus, the antenna plays a receiving role, converting electromagnetic waves into high-frequency current. In other words, the antenna acts as a receiving antenna. The quality of reception depends not only on the strength of the radio waves but also on the directivity of the antenna and the matching between the half-wave symmetric dipole and the receiving equipment.

olympus electrical component principle

The basic principle of a multimeter is to use a sensitive magnetoelectric DC ammeter (microammeter) as the meter head. When a small current passes through the meter head, there will be a current indication. However, the meter head cannot pass large currents, so resistors must be connected in parallel and series with the meter head for shunting or voltage reduction, thereby measuring the current, voltage, and resistance in the circuit. The measurement process of a digital multimeter converts the measured quantity into a DC voltage signal via a conversion circuit, then converts the analog voltage into a digital quantity via an analog-to-digital (A/D) converter, then counts via an electronic counter, and finally displays the measurement result directly as numbers on the display screen. The functions of measuring voltage, current, and resistance with a multimeter are realized through the conversion circuit part, while the measurement of current and resistance is based on voltage measurement. That is to say, a digital multimeter is expanded from a digital DC voltmeter. The digital DC voltmeter's A/D converter transforms the continuously changing analog voltage over time into a digital quantity, which is then counted by an electronic counter to obtain the measurement result, and the measurement result is displayed by a decoding display circuit. The logic control circuit coordinates the work of the circuit, completing the entire measurement process in sequence under the action of the clock.

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