PC级双电源自动转换开关本体为负荷隔离开关，电磁驱动，切换速度快，是一种能够接通、承载、但不用于分断短路电流的ATSE。产品广泛适用于额定工作电压交流240/415V，频率50/60HZ的的紧急供电系统。当一路电源发生故障时，可以自动完成常用电源和备用电源进行电源制件切换，而无需人工操作，以保证重要用户供电的可靠性。主要用于医院、商场、银行、人防、化工、冶金、高层建筑，军事设施和消防等不允许断电的重要场所。
正泰NH40SZ自动转换开关，适用于交流50Hz、交流额定电压380V及以下、直流额定电压440V及以下、额定电流至3200A、三相四线制供电系统.
NH40SZ-20/3,NH40SZ-20/4
NH40SZ-25/3,NH40SZ-25/4
NH40SZ-32/3,NH40SZ-32/4
NH40SZ-40/3,NH40SZ-40/4
NH40SZ-63/3,NH40SZ-63/4
NH40SZ-80/3,NH40SZ-80/4
NH40SZ-100/3,NH40SZ-100/4
NH40SZ-160/3,NH40SZ-160/4
NH40SZ-250/3,NH40SZ-250/4
NH40SZ-400/3,NH40SZ-400/4
NH40SZ-630/3,NH40SZ-630/4
NH40SZ-1000/3,NH40SZ-1000/4
NH40SZ-1250/3,NH40SZ-1250/4
NH40SZ-1000/3,NH40SZ-1600/4
NH40SZ-2500/3,NH40SZ-2500/4
NH40SZ-3150/3,NH40SZ-3150/4
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