Vacuum Feeding Switch for Mine Explosion Proof-Dw80-400A
Model No.: DW80-400A
DW80-400A series vacuum feeding switch is mainly used in mine underground. It is applied in AC 50 Hz power system with rated voltage 660A/1140A, rated current 400A, especially for transformation for DW80-350 air break switch. It plays the role of main switch, branch switch in power system. When it appears overload, short-circuit or power leakage or something wrong in line, it will turn off current automatically. It has the function of power leakage protection. As main switch, it is used for backup protection of branch switch with three-phase symmetry leakage protection. As branch switch, it has the function of selective leakage protection and earth leakage blocking. With overload protection, it also has the feature of inverse time property.
1.playing the role of main switch, branch switch in power system;
2.excellent breaking capacity, high speed of analyzing;
3.Simple electric principle, complete protecting function and display function.
Main Technology Parameters
|Rated voltage||1140V 660V|
|Limit breaking current||9000A|
|Short-circuit protecting action time||≤100ms|
|The range of short-circuit||1.5~6 ( be adjustable )|
|As main switch (I K) position|
|660V Leakage action resistance value||9~13KQ|
|1140V Leakage action resistance value||11~24KQ|
|Three phase action resistance value as main switch||<60kΩ|
|As branch switch (FK) position|
|660V Leakage action resistance value||5~13kΩ|
|1140V Leakage action resistance value||11~24kΩ|
|As branch switch, earth leakage blocking value(FK) position|
|660V Leakage blocking value||22+20%kΩ|
|1140V Leakage blocking value||40+20%kΩ|
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Product Categories : High-voltage contactor