厦门彬硕-小胡
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
接起动时电流可达到额定电流的6-7倍，对电网的冲击较大，特别是大功率电动机。
2，降压起动。降压起动主要有热自藕降压起动和星三角降压起动。
热自藕降压起动是指通过自藕变压器在起动时降低电机电压，同时降低起动电流。一般降低为额定电压的55%-75%左右。优点是可以通过改变自藕变压器的抽头圈数方便地改变起动电压。缺点是需要用到自藕变压器，成本较大。
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，能够平滑地改变起动电流，对电网的冲击较小，是较为理想的起动方式。但是大功率的频敏电阻都是采用电感的形式，所以在使用时会产生较大的电磁涡流，会降低电网的功率因数。
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