VMIVME-7592-940
VMIVME-7592-940
VMIVME-7592-940
答:熔断器在电气线路中主要起短路保护和严重过载保护作用，而热继电器主要用于过载保护.两者不能互为代用，但可以互为补充.如果用熔断器作电动机的过载保护，为了防止电动机在启动过程中熔断器熔断，熔断器熔体的额定电流一般应取电动机额定电流的2. 5~3倍，这样即使电动机长时间过负荷50%，熔断器也不会熔断，而电动机可能因长时间过负荷而烧坏.所以不能用熔断器作过负载保护.而热继电器是利用电流的热效应来工作的，由于热惯性的影响，尽管发生短路时电流很大，也不可能使热继电器立即动作，这样就延长了短路故障的影响时间，对供电系统及用电设备会造成危害.所以也不能用热继电器作为短路保护.
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厦门泰尼电气有限公司
【产品质量】原装进口
【检测标准】按原厂标准
【产品质保】 1 年
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厦门泰尼电气有限公司
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