1. Function
This mine explosion-proof type vacuum feeder switch is mainly used as main switch orbranch switch in AC 50Hz power distribution system with rated voltage of 1140V or 660Vand rated current of 400A or below in under ground coal mines with explosive anddangerous (methane) and coal dust and it is also used for non-frequent start of big capacitymotor.
3. CharacteristicsProtection for short circuit,overload,electric leakage and leakage lockoutSetting of multiples of overload and short circuit is availableSelective leakage adopts appending DC power supply principleTheoperating mechanism adopts manual switching on or off, and it adopts electro-magnetic tripping in fault state. 3.13.23.33.4
5. Overall Dimension
4. Technical ParameterRated voltage(V):1140, 660Rated current(A):400, 200Short-circuit protective action time(ms): ≤100Single-phase 1kΩ resistance earthing,action protective time(ms): ≤30