公司名称：厦门彬硕自动化科技有限公司

厦门彬硕-小胡 电话18900224342 0592-5588308 QQ：469126278

德国西门子SIEMENS:3RK 3RA 3RB 3RF 3RG 3RH 3RN 3RP 3RS 3RT 3RV 3RX 3SK 3TC 3TD 3TG 3TH 3TK 3TS 3TX 3UF 3UG 3LD 8WD 6SL39 6SE70 6SY 6DD 6RY 6SB等备件产品


星三角降压起动是指通过改变电机的接线方式而改变起动电压，从而降低起动电流的一种方法，只能适用于正常接线方式为三角形接法的电机。在起动时，使用继电器方法使电机接线方式为星形，此时电机的每相电压降低为原来的根号三分之一，电机转速达到额定转速的80%左右，控制继电器改变电机接线方式为三角形，电机开始正常运转。优点是可以节省自藕变压器，降低成本，同时接线方法简单，可靠性较大。缺点是无法改变起动电压的比率，同时无法使用在星形接法的电机。

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