Mining Explosion-evidence and intrinsically safe multi-loop vacuum electromagnetic starter
Primary application
QJZ2-4×80,one hundred twenty,200/1140(660)mine explosion-evidence and intrinsically secure variety 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 manage and safeguard the beginning and stopping of 4 or significantly less a few-stage squirrel cage asynchronous motors at the very same time, and can modify the phase sequence when stopping. It is especially ideal for centralized monitoring of mining, transportation, mining and other doing work faces with concentrated electricity load.
The safety technique of this sequence of switches adopts PLC + industrial control built-in device, geared up with large-precision knowledge processing and sophisticated security algorithm, with substantial security accuracy and rapidly response speed. It can complete the motor overload, quick circuit, leakage locking, undervoltage, overvoltage, three-stage imbalance, break equal protection functions.
CZPT traits
1. Fast opening structure
two. With nearby control and remote control function
three. With dependable mechanical locking and electrical locking operate
Security perform
With the multiple protection features as short circuit, overload, leakage and open-phase
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