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NAME： QJZ-2×120（80）/1140（660）SF煤矿风机用 隔爆兼本质安全型双电源真空电磁起动器
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Product Description
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用途
该产品主要用于煤矿瓦斯气体环境下，在交流50Hz，额定电流至120A，额定电压为660V、1140V的线路中，对三相鼠笼式异步电动机的起动、停止进行控制和保护，并可在停止时进行换向。
特点
产品主要针对煤矿井下大量使用的对旋式风机或单风机，可实现采掘工作面双风机双电源，此外两台电机还可实现延时起动、延时切换，既能防止吹裂风筒，又能减少风机起动时对电网电压的冲击。由于该起动器设计为一体式的两个独立隔爆腔，当主机出现故障时，可以自动转换到备机，实现不停机检修。该起动器的保护采用了智能化综合保护器，操作直观简便，能在系统带电的情况下，通过外引按钮，方便的进行定值调整、信息查询;保护精度高，反应速度快，能完成漏电闭锁、欠压、过压、三相不平衡、过载、短路、断相、风电报警等多种保护功能。
主要技术参数
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额定电压：AC1140V、660V |
额定工作电流：120A、80A |
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额定频率：50Hz |
极限分断能力： 2500A |
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本安最高开路电压：DC 15.4V |
本安最大短路电流：DC 5mA |
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最大控制功率 |
在1140V，ηCOSΦ＝0.75时最大功率为150kW |
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工作制：长期 |
隔爆型式：隔爆兼本质安全型 |
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