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NAME： QJZ-500/1140(660)矿用隔爆型兼本质安全型真空电磁起动器
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用途
QJZ-500/1140 (660)矿用隔爆型兼本质安全型真空电磁起动器(以下简称起动器)，主要用于煤矿瓦斯气体环境下，在交流50Hz,额定电流至500A，额定电压为660V、1140V的线路中，对三相鼠笼式电动机的起动、停止进行控制和保护，并可在停止时进行换向。
主要特点
起动器使用智能型单片机综合保护器，具有过载、相不平衡、漏电闭锁、短路等保护及相应的故障显示，通过保护器的菜单，可实现试验功能，可方便检测各项保护功能。
(1)起动器操作方式有两种
远控:按原理图外接远控按钮及二极管，用以对电动机进行起停控制;
近控:使用起动器本身的按钮，对电动机进行起停控制;
(2)起动器具有手动紧急停止和换向功能;
(3)起动器具有液晶显示功能，可显示:
a三相电流，系统电压;
b合闸运行，分闸待机;
c过载、相不平衡、短路、漏电闭锁，高低速转换;
d故障查询;
主要参数
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额定电压: AC1140V、660V |
额定工作电流: 500A |
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额定频率: 50Hz |
极限分断能力: 6000A |
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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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机械寿命: 300万次 |
电寿命: AC-3类别30万次; AC- 4类别3万次 |
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最大控制功率 |
在1140V, η COS中= 0.75时最大功率为735kW |
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在660V，η COS中= 0.75时最大功率为425kW |
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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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