长白山干式变压器组传感器故障及检修机常用的润滑油压力和油温、水温传感器,多利用阻值随压力、温度的变化特性制成,因而故障的判断可通过测试电阻值和测量电压值的方法实现。(1)测试电阻值1)单体检查。从机组上拆下冷却液温度传感器,并将其置于水杯中,缓慢加热提高水温;同时用万用表测量传感器两端子间的电阻值,应在正常范围内;否则表明传感器已损坏,应换用新的传感器。冷却液温度传感器阻值的参考变化范围为正常的传感器20℃时的电阻值为2~3kΩ,40℃时的电阻值为0.9~1.3kΩ,80℃时应为0.2~0.4kΩ左右。如果测量结果不符合规定要求,应更换。机油压力传感器可利用压气机气压测试,并用万用表测量传感器两端子间的电阻值,应在正常范围内(参考说明书)。2)就机组检查。将冷却液温度传感器的连接线断开,用万用表测定传感器两端子间的电阻值,判断传感器的好坏。(2)测量电压值可就机测试传感器输出的电压值。传感器正常连接和工作运行时,从传感器信号接线柱对地测试传感器输出的电压信号,其电压值应随温度或压力的变化而变化,测量电压并与正常参数值相比较,即可判断温度传感器是否在正常工作运行。对于机所用转速传感器,因其多是磁脉冲式的,能发出交流电压信号,故检修时可使用万用表或示波器。一个性能良好的转速传感器在用万用表交流电压档测量时,其输出电压应在1.5~3.0V范围内。若无交流电压输出或输出电压不符合规定,则传感器故障或安装不当。如果怀疑传感器内部导线接触不良,可将万用表置于电阻档,与传感器导线相连接,然后晃动导线看万用表指针是否摆动,如果摆动则证明传感器内部导线接触不良,应排除。
动力设备(深圳)有限公司,集团旗下专业运营长白山干式变压器的销售业务及其售后服务,是中国区获得授权的长白山干式变压器OEM成套厂家,长期与中字央企、大型房地产商、国际连锁酒店、著名建筑企业等单位建立战略合作伙伴关系。动力在中国布局五大长白山干式变压器组生产基地,长白山干式变压器售后服务点可辐射中国各省会及地级市区域。?长白山干式变压器区分:移动式长白山干式变压器、固定式长白山干式变压器、超静音式长白山干式变压器、机组载式长白山干式变压器。?常见长白山干式变压器功率(千瓦)范围:50KW至1000KW功率段。更多有关长白山干式变压器的最新产品和技术内容,请登录长白山干式变压器官网:
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