brumberg electrical components Germany brumberg model brumberg price

brumberg electrical components are instruments that measure by converting high primary current to low secondary current based on the principle of electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured. Therefore, the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the measuring instrument and the protection circuit series coil is very small, and the operating state of the current transformer is close to a short circuit. The current transformer converts high primary current to low secondary current for measurement; the secondary side must not be open-circuited. The principle of the current transformer is based on electromagnetic induction. A current transformer consists of a closed iron core and windings. Its primary winding has very few turns and is connected in series in the circuit where the current needs to be measured, so the full current of the line often flows through it. The secondary winding has more turns and is connected in series in the measuring instrument and protection circuits. When the current transformer is in operation, its secondary circuit is always closed, so the impedance of the measuring instrument and the protection circuit series coil is very small, and the operating state of the current transformer is close to a short circuit.

brumberg electrical component requirements

1, copper and aluminum rods commonly used for power cords are passed through one or several drawing dies using a wire drawing machine at room temperature to reduce their cross-section, increase their length, and improve their strength. Wire drawing is the first process in various wire and cable companies, and the main process parameter of wire drawing is die matching craftsmanship. 2, copper and aluminum single wires are heated to a certain temperature to improve the toughness and reduce the strength of the single wires by recrystallization, to meet the requirements of wire and cables for conductive cores. The key to the annealing process is to prevent oxidation of copper wires. 3, to improve the flexibility of power cords for easier laying and installation, the conductive core is made by stranding multiple single wires. According to the stranding method of the conductive core, it can be divided into regular stranding and irregular stranding. Irregular stranding is further divided into bunch stranding, concentric compound stranding, and special stranding. To reduce the occupied area of the conductor and the geometric size of the power cord, compacted methods are used during conductor stranding, changing the ordinary circular shape into semi-circular, sectoral, tile-shaped, and compacted circular shapes. This type of conductor is mainly used in power cords. 4, plastic power cords mainly adopt extruded solid insulation layers. The deviation value of the insulation thickness of plastic insulation is an important indicator reflecting the level of extrusion craftsmanship. Most product structural dimensions and their deviation values are clearly specified in standards. The surface of the plastic insulation layer is required to be smooth, without poor quality issues such as roughness, scorching, or impurities. The cross-section of the insulation layer must be dense and firm, with no visible pinholes, and the presence of bubbles is strictly prohibited. 5, multi-core power cords generally need to be stranded into a circular shape to ensure formability and reduce the outer shape of the power cord. The mechanism of cabling is similar to conductor stranding. Since the stranding pitch diameter is large, non-back-twist methods are mostly adopted. Technical requirements for cabling: first, prevent twisting of the cable caused by the turnover of shaped insulated cores; second, prevent scratching of the insulation layer. Most cables complete two other processes simultaneously with cabling: one is filling, to ensure the roundness and stability of the cable after cabling; the other is binding, to ensure the cable core does not loosen. 6, to protect the insulated core from being damaged by the armor, appropriate protection is required for the insulation layer. Inner sheaths are divided into: extruded inner sheath (separating sleeve) and wrapped inner sheath (cushion layer). The wrapped cushion layer replaces the binding tape and proceeds synchronously with the cabling process. 7, for power cords laid underground that may withstand certain positive pressure during operation, an internal steel tape armored structure can be selected. For power cords laid in places with both positive pressure and tensile force (such as in water, vertical shafts, or soil with large drops), a structure with internal steel wire armor should be selected. 9, the outer sheath is the structural part that protects the insulation layer of the power cord from environmental corrosion. The main functions of the outer sheath are to improve the mechanical strength of the power cord, resist chemical corrosion, moisture, water ingress, and prevent the power cord from burning. Plastic sheaths are directly extruded using an extruder according to different requirements for the power cord.

brumberg electrical component principle

A resistor consists of three parts: the resistive element, the skeleton, and the terminals (for solid-core resistors, the resistive element and skeleton are combined into one), and only the resistive element determines the resistance value. The volt-ampere characteristic uses a graphical curve to represent the relationship between voltage and current at the resistor terminals. When voltage and current are proportional (the characteristic is a straight line), it is called a linear resistor; otherwise, it is called a non-linear resistor. The maximum power allowed to be dissipated by a resistor when operating continuously at the rated temperature (maximum ambient temperature) tR. For each type of resistor, a maximum working voltage is also specified. That is, when the resistance value is high, even if the rated power is not reached, the maximum working voltage must not be exceeded. The rated power of a resistor refers to the maximum power allowed to be consumed by the resistor during long-term continuous operation in DC or AC circuits. Load characteristics: When the ambient working temperature is lower than tR, the resistor must not exceed its rated power. When it exceeds tR, the load power must be reduced. Each type of resistor has specified load characteristics. In addition, the allowable load is correspondingly reduced under low air pressure. Under pulse load, the average pulse power is far lower than the rated power, and there are generally separate regulations.

brumberg electrical component characteristics

Common types include RC phase-shifting bridge trigger circuits, unijunction transistor trigger circuits, bipolar junction transistor trigger circuits, and trigger circuits that use small thyristors to trigger large thyristors, etc. The main parameters of thyristors are: 1, rated on-state average current IT: the average value of the 50 Hz sinusoidal half-wave current that can continuously pass between the anode and cathode under certain conditions. 2, forward blocking peak voltage VPF: the forward peak voltage that can be repeatedly applied across the thyristor when the gate is open without a trigger signal and the anode forward voltage has not exceeded the conduction voltage. The forward peak voltage withstandable by the thyristor must not exceed this parameter value given in the manual. 3, reverse blocking peak voltage VPR: the reverse peak voltage that can be repeatedly applied across the thyristor when reverse voltage is applied and the thyristor is in the reverse off-state. During use, this parameter value given in the manual must not be exceeded. 4, trigger voltage VGT: the minimum gate current and voltage required to switch the thyristor from the off-state to the on-state when a certain voltage is applied between the anode and cathode at the specified ambient temperature. 12, holding current IH: the minimum anode forward current required to maintain the thyristor in the on-state when the gate is open-circuited at the specified temperature. Many new types of thyristor components have been introduced, such as fast thyristors suitable for high-frequency applications, bidirectional thyristors that can control conduction in both directions with positive or negative trigger signals, and thyristors that can be turned on with a positive trigger signal and turned off with a negative trigger signal.

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