ELPROMAN electrical components Germany ELPROMAN model ELPROMAN price

ELPROMAN electrical components are components that convert electrical energy into magnetic energy for storage. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance and only opposes changes in current. If the inductor is in a state with no current flowing, it will attempt to oppose current flow when the circuit is closed; if the inductor is in a state with current flowing, it will attempt to maintain the current unchanged when the circuit is opened. Inductors are also known as chokes, reactors, or dynamic reactors.

ELPROMAN electrical components classification

For different application scenarios, the purpose of applying varistors, and the voltage/current stress acting on the varistors, are not the same; therefore, the requirements for varistors also differ. Paying attention to these differences is very important for correct use. According to different purposes, varistors can be divided into two categories: protection varistors and circuit function varistors. ① Protection varistors: 1, distinguish between power supply protection and signal line/data line protection varistors, as they must meet different technical standard requirements. 2, according to the different continuous operating voltages applied to the varistor, varistors across power lines can be divided into AC type or DC type; the aging characteristics of varistors under these two voltage stresses differ. 11, according to the different abnormal overvoltage characteristics withstand by the varistor, varistors can be divided into three types: surge suppression type, high-power type, and high-energy type. ② Surge suppression type: refers to varistors used to suppress transient overvoltages such as lightning overvoltage and switching overvoltage. The occurrence of this transient overvoltage is random and non-periodic, and the peak current and voltage may be very high. The vast majority of varistors belong to this category. ③ High-power type: refers to varistors used to absorb continuous pulse groups that appear periodically, such as varistors connected in parallel to switching power supply converters. Here, the impulse voltage appears periodically, and the period is known. The energy value can generally be calculated. The voltage peak is not large, but due to the high frequency of occurrence, the average power is quite high. ④ High-energy type: refers to varistors used to absorb magnetic energy in large inductive coils such as generator excitation coils and lifting electromagnet coils. For such applications, the main technical indicator is energy absorption capacity. The protective function of varistors can be repeated many times in most application scenarios, but sometimes they are made into one-time protective devices like current fuses. For example, varistors with short-circuit contacts connected in parallel to the loads of certain current transformers.

ELPROMAN electrical components structure

For rubber and plastic power cable cores used for power, lighting, and internal installation of electrical equipment, copper cores are preferred; for large cross-section conductors, compacted stranded cores should be used. Conductors for fixed installation generally adopt Class 1 or Class 2 conductor structures. Insulation materials generally include four types: natural styrene-butadiene rubber, polyvinyl chloride (PVC), polyethylene, and nitrile-PVC compounds. Heat-resistant power cables use PVC with a temperature resistance of 90 °C. Sheath materials generally include five types: PVC, cold-resistant PVC, ant-proof PVC, black polyethylene, and neoprene rubber. Black polyethylene and neoprene sheathed power cables are suitable for extreme cold resistance and outdoor overhead laying. In environments with external forces, corrosion, or humidity, power cables with rubber or plastic sheaths can be used. Rubber and plastic flexible power cables use copper cores with a flexible structure, consisting of multiple single wires twisted together; flexible conductors generally adopt Class 5 or Class 6 conductor structures. Insulation materials generally include natural styrene-butadiene rubber, PVC, or soft polyethylene plastic. The cabling lay ratio multiplier is small. The outer protective layer uses cotton yarn braiding to prevent overheating and damage to the insulation layer. To facilitate use and simplify production processes, a three-core balanced structure is adopted, which saves production man-hours and improves production efficiency. Shielded insulated power cable cores may be tinned in certain occasions; the surface coverage density of the shielding layer should comply with standards or meet user requirements; the shielding layer should be braided or wrapped with tinned copper wire; if an extruded sheath is added outside the shield, the shield may use soft round copper wire braiding or wrapping. To prevent internal interference between cores or pairs, individual phase shielding structures for each core (or pair) can be produced. General-purpose rubber-sheathed rubber power cable cores use copper flexible stranded wires with a flexible structure; large cross-section surfaces may be paper-wrapped to improve bending performance. Insulation uses natural styrene-butadiene rubber, which has good aging performance. Rubber for outdoor products uses neoprene or a neoprene-based mixed rubber formula. Mining rubber power cable cores use copper cores with a flexible structure, consisting of multiple single wires twisted together; flexible conductors generally adopt Class 5 or Class 6 conductor structures. Insulation materials generally use rubber. The cabling lay ratio multiplier is small. Many products use metal braiding to equalize the electric field and improve the sensitivity display of insulation status. There is a thicker outer sheath, and color coding is performed underground in mines so that construction personnel understand the different voltage levels of the rubber power cables.

ELPROMAN electrical components function

Antennas radiate radio waves and also receive radio waves. However, what the transmitter sends to the antenna through the feeder is not radio waves, and the receiving antenna cannot directly send radio waves to the receiver through the feeder; an energy conversion process must occur. Below, we take radio communication equipment as an example to analyze the signal transmission process, thereby illustrating the energy conversion role of the antenna. At the transmitting end, the modulated high-frequency oscillating current (energy) generated by the transmitter is input to the transmitting antenna via the feeding device (the feeding device can directly transmit current waves or electromagnetic waves depending on frequency and form). The transmitting antenna converts the high-frequency current or guided wave (energy) into radio waves—free electromagnetic waves (energy)—radiating them into the surrounding space. At the receiving end, radio waves (energy) are converted by the receiving antenna into high-frequency current or guided wave (energy) and transmitted to the receiver via the feeding device. From the above process, it can be seen that the antenna is not only a device for radiating and receiving radio waves, but also an energy converter, serving as the interface device between the circuit and space.

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