ZPS series medium frequency furnace special transformer is a new type of high efficiency and energy saving transformer developed by Henganyuan Electric after many years of research and development. The medium frequency furnace special transformer is continuously researched and developed according to the design principle of the medium frequency furnace transformer. Its listing saves a lot of cost and cost for the user, and the money saving effect is tangible and tangible. Our company can be customized according to user needs.
2、中频炉变压器的铁芯：采用30Q130高导磁硅钢片，同时采用选进的3～6级step-lap core stacking步进多级叠片方式，有较降低了空载损耗、空载电流和噪声。
1.Oil tank: The oil tank adopts the heat-dissipating oil pipe (the double-row and the three-row oil pipe adopt the inserting method), or the step-plate type heat sink increases the heat-dissipating capacity under the same wall area; the calculation can also be installed according to the user's requirements. Radiator or corrugated oil tank, and strong oil air-cooled or strong oil water-cooled radiator. Oil tank surface treatment: The transformer shell paint adopts “three anti-paint” (anti-salt spray, anti-humidity heat, anti-mold), the paint and primer have strong adhesion, good decoration, film oil resistance, corrosion resistance, gloss retention, Good color retention, good leveling and hiding power..
2. The core of the intermediate frequency furnace transformer: 30Q130 high permeability magnetic silicon steel sheet is adopted, and the selected 3-6 stage step-lap core stacking stepping multi-stage lamination method is adopted, which reduces the no-load loss and no-load current. And noise.
3. Winding: The electromagnetic wire adopts the oxygen-free copper wire with high conductivity. The winding adopts the whole process of the whole package of the cylindrical type, double cake type and new spiral type, which makes the product structure more compact and the main insulation can be effectively guaranteed. The first and last layers are strengthened to improve the insulation performance. The outer surface of the winding is wound with a high-strength tightening belt, which improves the mechanical strength of the winding and greatly improves the impact resistance and short-circuit resistance of the product.
4. Body: The insulation blocks of the body are supported by high-strength laminated wood and laminated cardboard, so that the support area of the end of the winding reaches over 95%, which further improves the short-circuit resistance of the product and improves the reliable operation of the product. Sex. The connection between the body and the cover adopts a rigid buffer structure, which overcomes the phenomenon of "hanging" and "top cover" of the body. The insulating materials are wrapped with high-strength, high-density cable paper, which allows a compressive stress of 45 MPa..
1. Energy saving, high efficiency and environmental protection.
According to the national mandatory standard "power transformer energy efficiency limit value and energy efficiency rating" requirements, the special frequency transformer for intermediate frequency furnace produced by the special electric power is a first-class standard (the first-class product has the lowest energy consumption and the third-class product has the highest energy consumption). Transformers play a very important role in the construction of the power grid. The power transformer is the key electrical equipment for transmitting electricity. The self-consumption of the transformer accounts for 30%~40% of the grid loss. On the one hand, it can effectively reduce the energy consumption and noise during operation, on the other hand, it should minimize the use of raw materials such as copper, iron, oil and insulation, and avoid excessive waste of non-renewable resources. Power saving effect is obvious, low noise (<65dB).
The special transformer for medium frequency furnace produced by Henganyuan Electric uses 12-pulse transformer to eliminate the harmonics of the grid side winding.
Harmonics are sinusoidal waves, each with a different frequency, amplitude and phase angle. Harmonics can be divided into even and odd times. The third, fifth, and seventh times are odd harmonics, and 2, 4, 6, and 8 are even harmonics. For example, if the fundamental is 50Hz, 2 The subharmonic is l00Hz, and the third harmonic is 150Hz. In general, odd harmonics cause more damage than even harmonics.
The product combines load characteristics and grid voltage fluctuations, atmospheric over-voltage conditions, according to the load condition of the rectifier transformer, determines a reasonable and reliable insulation level and insulation model to fully ensure the electrical performance of the product is reliable and stable. Product environmental safety factor ≥ 1.67.
3.No heat, strong overload
Henganyuan produces iron cores and wires in high-quality, high-magnetic, low-loss high-quality silicon steel sheets, and scientifically determines the proportion of copper and iron by accurately calculating the technical parameters. The raw materials ensure that the transformer has low no-load loss and low noise performance. Through the "open source and throttling" method, the heat dissipation of the transformer and the effective control of the current are increased to ensure the stable and efficient operation of the transformer.
Advanced product design, strictly control the heating part of the product and the hottest temperature rise, and leave sufficient temperature rise margin. If necessary, add axial oil passage to the coil, and select the cooling method according to the coil load loss value. The oil flow is distributed to achieve the best cooling effect, and the main temperature rise indicators are at least 5 °C lower than the national standard. The coil and the lead wire are made of copper wire, and the current density is selected to be low.
The product has strong overload capacity and over-voltage capability. It can operate safely for a long time under rated load conditions. It can operate at full load for a long time under 110% over-voltage condition (ambient temperature 40°C); terminal connected to transformer and motor It can withstand 1.5 times the rated current and lasts for 5 seconds. The product design and manufacture fully consider the load characteristics, and meet the overload requirements from various aspects such as temperature rise, insulation performance and accessory selection.
4. short circuit
According to the statistical results of transformer short-circuit shock accidents, the short circuit caused by manufacturing causes about 80%, while the operation and maintenance reasons only account for about 10%.
Henganyuan Electric has improved the short-circuit resistance of special transformers for intermediate frequency furnaces by the following measures:
1) Standard design, pay attention to the axial deposit process of coil manufacturing.
2) Short-circuit experiments on special transformers for intermediate frequency furnaces to prevent problems before they occur.
3) Use reliable relay protection and automatic reclosing system.
Through the above methods, the short-circuit resistance of the intermediate frequency furnace transformer is enhanced, and the user's safety, stability, and long-lasting use and benefits are ensured.
1. IEC60076-1:1993 Power Transformer
2. GB1094.1-1996 power transformer
3. GB6451-2008 oil immersed power transformer technical parameters and requirements
4. JB/T10088-2004 6KV~500KV class power transformer sound level
1. the highest ambient temperature: +40 ° C
2. the minimum ambient temperature: -25 ° C
3. Altitude: <1500m
4. the highest monthly average relative humidity: 90% (20 ° C)
5. Installation location: Installed in a place without fire, explosion hazard, serious pollution, chemical corrosion and severe vibration, indoors or outdoors.