6FC5357-0BB35-0AA0
6FC5357-0BB35-0AA0
6FC5357-0BB35-0AA0
5.软起动器是如何实现轻载节能的？
笼型异步电机是感性负载，在运行中，定子线圈绕组中的电流滞后于电压。如电机工作电压不变，处于轻载时，功率因数低，处于重载时，功率因数高。软起动器能实现在轻载时，通过降低电机端电压，提高功率因数，减少电机的铜耗、铁耗，达到轻载节能的目的；负载重时，则提高电机端电压，确保电机正常运行。
6.软起动器具有哪些保护功能？
（1）过载保护功能：软起动器引进了电流控制环，因而随时跟踪检测电机电流的变化状况。通过增加过载电流的设定和反时限控制模式，实现了过载保护功能，使电机过载时，关断晶闸管并发出报警信号。
（2）缺相保护功能：工作时，软起动器随时检测三相线电流的变化，一旦发生断流，即可作出缺相保护反应。
（3）过热保护功能：通过软起动器内部热继电器检测晶闸管散热器的温度，一旦散热器温度过允许值后自动关断晶闸管，并发出报警信号。
（4）其它功能：通过电子电路的组合，还可在系统中实现其它种种联锁保护。
＆ 公司全称 ： 厦门泰尼电气有限公司
＆ 销售代表 ： 小黄
＆ 洽谈电话 ：
＆手机：
＆ 商务 QQ ： 2917675397
＆ 传真（FAX)： （请注明，01006收）
＆ 公司地址 ： 厦门市海沧区海沧街道滨湖一里7号
＆ 公司网址 ： www.xmtaini.com
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