| 用途 Application |
Ⅱ 该产品用于煤矿井下交流50Hz,额定电压为1140或660V,额定电流在400A及以下的三相中性点不直接接地的供电系统中,作为配电系统总总开关、分支开关，也可以作为大容量电动机不频繁启动控制之用。
Ⅱ 该产品综合保护采用数字化单片技术，具有过载、短路、欠压、失压保护；选择性能电保护；分支开关漏电保护的后备保护以及漏电闭锁保护功能。
Ⅱ This product is applicable to coal mine three-phase power supply system,which is neutral point and not direct grounding with AC 50Hz,rated voltage 1140V or 660V,rated current 400A or below.It can be used as main switch and branch switch for distribution system,also can be used for not-frequent starting control for large capacity electromotor.
Ⅱ This product comprehensive protection adopts digital single chip technology,possess the functions such as overload,short circuit,under voltage,voltage loss protection;selective electrical leakage protection;standby protection for branch switch electrical leakage,and electrical leakage locking protection. |
| 型号 Model |
 |
| 技术参数 Technical parameter |
|
额定电流 Rated working current |
400A |
200A |
|
额定电压 Rated working voltage |
1140V |
660V |
1140V |
660V |
|
额定短路通断能力 Rated short-circuit connect and break capability |
7.5KA |
9KA |
4.5KA |
7.5KA |
|
漏电保护动作值 Leakage protection action value |
20KΩ |
11KΩ |
20KΩ |
11KΩ |
|
漏电闭锁值 Leakage locing value |
40KΩ |
22KΩ |
40KΩ |
22KΩ |
|
短路保护动作时间 Short-circuit protection action time |
＜100ms |
＜100ms |
|
漏电保护分断时间 Leakage protection breaking time |
≤30ms |
≤30ms | | | | |
|
|
