变压器

It has been obtained by analysis that for ultra-high power electric arc furnace using scrap charging the relation formula between rating capacity of transformer Pn and parameters- electric power consumption W, transformer power utilization ratio C 2, total power o...

经分析得出以废钢为原料的超高功率电弧炉变压器额定容量Pn kVA与吨钢电耗W、变压器功率利用率C2 、总通电时间ton、出钢量G之间的关系式为：Pn =(W·G·6 0 )(ton·cosφ·C2 )，同时给出了二次电压的确定方法。

The implementation of on-line monitoring of oil-dissolved gas for transformer tap changing switch contributes to correctly judge the faulty condition and extending trend of tap changing switch, to reduce the maintenance cost of tap changing switch as well as to improve the operational security and reliability of transformer.

对变压器分接开关实施油中溶解气体的在线监测，有助于正确判断分接开关的故障状态和发展趋势，降低分接开关的维护成本，并提高变压器运行的安全性和可靠性。

Otherwise the generator transformer and unit transformer will be over heated and may be damaged.

否则发电机变压器和单元厂用变压器将会过热而导致损坏

Then a series of practical engineering problems, such as the image shaping principle of infrared laser device, the utilizing of infrared laser device in power transformer fault diagnosis, the working procedure in real field operation, the acquiring of heat spectrum from fault transformer in field test, the analyzing of heat image spectrum etc, were considered and overcame.

由于红外诊断具有非接触性和诊断运行中设备的特点，其诊断结果受到外界环境和判别方法的影响，因此提高变压器红外诊断技术的准确性及提高其应用效果具有重要影响，对变压器红外诊断应用技术进行研究具有重要的工程实用价值。

A model of impulse voltage distributionon transformer winding is build up, and impulse voltage distribution about time and positionhave been given.

建立变压器在雷电冲击下的暂态分析模型，得到变压器高压绕组在不同时刻及不同位置时的冲击分布响应。

Two large softwares for transient analysis of local oscillation and impulse voltage distributions in the transformer windings have been worked out.

编制了变压器线圈局部振荡分析和变压器线圈冲击电压分布计算两个大型软件。

In the practical ease analysis of short-circuit impulse transformer vibration signal, this algorithm was proved to have higher sensitivity and accuracy in analyzing the wavelet packet energy characteristics and judging the transformer winding deformation

在变压器短路冲击振动信号分析实例中，利用该算法得到的小波包能量特征分析、判定变压器绕组变形，其有较高的灵敏度和准确性。

Check installation and connections between transformer and all switchboards and among each other and of the main incomers.

检查变压器与所有开关柜的安装、变压器与开关柜的连接以及柜间连接。

Depending on the relation between winding deformation and leak inductance ,it is pointed that the exact and real-time calculation of leak inductance is the key factor of winding deformation monitoring,especially of the technique development from off-li.

结合变压器绕组变形与漏电感参数的变化关系，指出变压器绕组漏电感参数的准确实时计算将成为绕组变形监测，尤其是从离线到在线监测技术发展的关键问题。

The furnace body's ф2200×1500 outer covering main body is made of 12mm steel plate,installed sensor in the lower part 45°of furnace body, the sensor is weight 2 ton induction iron cores made from top gear's W-151 the cold rolling 0.35m/m made by Wuhan Steel Silicon steel plate Factory, primary manufactured the water cooling coil from 10×10×2 copper pipe, and installed stainless steelwater cooling cover, the power Frequency Induction melting Furnace 's metal melting fluid namely the sensor sencondary loop, the entire electric furnace is a transformer actually, match a 6 grades self regulating transformer, shift gears by the electric tank control, the voltage may from low to high,divide 6 grade to rise to 380V, each grade of voltage is different, the output power is also different, the furnace temperature is also different along with different grade,so can suit smelting colored or black and so on different melting point metals, and may use as new furnace lining fireproof to smeltdiamantine drying furnace.

炉体由12mm钢板制成Ф2200×1500外壳主体，炉体下部45°安装有感应器，感应器由武钢硅钢片厂生产的最高档的W-151冷轧0.35m/m取向硅钢片制成重2吨感应铁心，初级由10×10×2铜管制成水冷线圈，并安装不锈钢水冷保护套，工频有芯熔炼炉的金属熔液即为感应器的次级线圈，整个电炉实际就是一个变压器，配套一台6档的自耦调压变压器，由电柜控制换档，电压可由低到高，分6级升到380V，每档电压不同，输出功率也不同，炉温也随档位不同而高低不同，以适应熔炼有色或黑色等熔点不同的金属，并可作新炉衬耐火冶金砂烘炉之用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。