上瑞电焊机不打火风扇正常转怎么回事

2025年03月26日 02:36
有2个网友回答
网友(1):

电源正常风扇也正常不打火

网友(2):

森达焊接电焊机用户维修手册
用户在使用电焊机过程中,往往存在着主机是完好的,只是与主机外部连接的附件出现故障造成主机无法工作,在焊机故障原因中占40%。因此在解决电焊机的故障时必须有一个什么是外部故障的概念。下图是焊机的示意图:
第一步检查:
电源、电源线。三相供电380V、单相220V。
单相电不存在缺相现象,主机不工作,风扇正常转动,查看电源总闸到主机之间的供电电压是否正常,电源连线是否断开或虚接。
主机有电源保险丝的查看保险是否熔断。
主机电源开关是否损坏。用万用表交流档测量主机的空开开关电压是否是380V或220V。
三相电存在缺相现象,主机控制电源只用二根火线。说明主机少一相电。缺相会导致主机无输出或者输出电压低,电流小,有缺相保护的主机无法工作或者开机无反映。
排除电源线至主机之间供电正常,检查焊机内部电源开关元件:如交流接触器、档位开关等损坏、也会造成缺相。
以上缺相根据机型不同,造成的故障现象不同:
注:ZX7系列电源(电网配电箱是否送电)三相(两相)380V电压,测量三根火线是否正常往往存在大部分用户用电笔测,电笔测不出电压值,必需要万用表测量U1,U2,U3线380V左右,并且三相电压基本平衡。上海通用ZX7系列接照国家标准GB——15579,1——2004制造,三相电源每相电压不能低于或高于10%。电压低350V时焊机不起弧或起弧电流小,焊接不成形。高于510V焊机内部元器件烧坏。
缺相造成的故障原因如ZX7系列不打火或者电流小;二保焊系列不熔丝;ZX5系列空载电压不足;氩弧焊无高频不打火;等离子无高压割不透。

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