LEESON ELECTRIC调速器174311.00专业代理

LEESON ELECTRIC调速器174311.00专业代理

指针式电流表都是由灵敏电流计改装而来的。灵敏电流计即使灵敏度再高，通过的电流多不超过30微安，而学生用电流表测得的电流强度都是0.6A，或者3A，远远超出大值。电流表既要让电路上的全部电流通过，又不允许通过线圈的电流超过安全限度。电流表是与被测用电器串联的，所以改装时要分流。将灵敏电流计与一个阻值较小的电阻并联，这样就会使大部分电流通过电阻，小部分经过表头。这时将表头标上新的刻度，就可以了。

学生用电流表有两个量程，也就是有两个电阻；指针式万用表上的量程选择实际是电位器。

3）当电动机属频繁起动、制动工作或处于重载起动且较频繁工作时，可选取大一级的变频器，以利用变频器长期、安全地运行。

Electric motors are the workhorse of the industry. Many applications exist where more than one motor can be used or the exact replacement is not available. LEESON makes every effort to maximize interchangeability, mechanically and electrically, where compromise does not interfere with reliability and safety standards. If you are not certain of a replacement condition, contact any LEESON Sales Office or LEESON Authorized Distributor.
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