Mining Explosion-proof and intrinsically safe multi-loop vacuum electromagnetic starter
Main application
QJZ-4×40,45,60/1140(660) mine explosion-proof and intrinsically safe type multi-loop vacuum electromagnetic starter is applicable to the mine with explosive gas and coal dust. In the circuit with AC 50Hz and rated voltage of AC1140v (660V), it can control and protect the starting and stopping of four or less three-phase squirrel cage asynchronous motors at the same time, and can change the phase sequence when stopping. It is especially suitable for centralized monitoring of mining, transportation, mining and other working faces with concentrated power load.
The protection system of this series of switches adopts PLC + industrial control integrated machine, equipped with high-precision data processing and advanced protection algorithm, with high protection accuracy and fast response speed. It can complete the motor overload, short circuit, leakage locking, undervoltage, overvoltage, three-phase imbalance, break equal protection functions.
Technical characteristics
1. Quick opening structure
2. With local control and remote control function
3. With reliable mechanical locking and electrical locking function
Protection function
With the multiple protection functions as short circuit, overload, leakage and open-phase
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