Mine Explosion-proof ,Leakage Detection, Relay has the function of protection from leakage
Mine Explosion-proof Feeding Switch
Applications
The leak detection relay is suitable for three-phase power supply grid with insulated neutral, with AC frequency of 50Hz and voltage of 660V under the mine with explosive gases (methane) mixture, to achieve protection from leakage, cooperated with the non-leakage-protective feeding switch.When used as main leakage-protective switch, cooperated with the selective leakage-protective branch switch, it can protect the grid with the function of time delay (300~400ms).
Features
The relay has the function of protection from leakage as well as obvious current supply for capacitors current in the circuit network.
Setting value of the single-phase leakage operation resistance (compensation capacitance) is as follows:
Rated voltage V | Setting value of the single-phase leakage operation resistance, kΩ | Time of single-phase grounding operation through the 1kΩ resistance, ms | Circuit network capacitance: 0.22∼1.0μf/compensation efficiency, η % | |
380 | 3.5 (+20%) | No time-delay | Time-delay | ≥60 |
660 | 11 (+20%) | ≤80 | 300-400ms |
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