Vacuum Feeding Switch for Mine Explosion Proof-Dw80-400A

Model NO.: DW80-400A Phase: 3 Main Circuit Rating Current: 400A Function: Power Leakage Protection Origin: Jiangyin Yunfeng, China Electricity Type: AC Main Circuit Rating Voltage: 1140V Type: Ac Contactors Trademark: YF DW80-400A
Product Overview 
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. 

Characteristics
   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
Rated current	400A
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

Contact us if you need more details on Feeding Switch. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Mine Explosion Proof、Power Leakage Protection. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : High-voltage contactor