Mining Vacuum Circuit Breakers MQBZ-200-1,14 Starter

Parameters

The starter is a flameproof rectangular enclosure containing an input, output and hardware compartments, 4 cable input devices and a mechanical interlock.

In the hardware compartment there is a power panel on which 2 contactors, a disconnector, a voltage transformer, fuses, a Stop button switch, current sensors and intermediate relays are installed.

The mechanical interlock of the disconnector with the cover ensures the safety of starter servicing in operating conditions.

The starter provides operation in continuous, intermittent, continuous and intermittent modes.

The mechanical wear resistance of the starter is at least 3 · 106 cycles of on-off (VO), the disconnector is not less than 6300 cycles VO.

The starter design provides three cable entries for control circuits and five for power circuits.

Devices for connecting input power cables are designed to connect both flexible and armored cables.

Terms of Use:

• ambient temperature from -10 to +35°С;
• Relative humidity of air up to 100% (with moisture condensation) at a temperature of 35 ° С;
• height above sea level no more than 1000 m;
• environment explosive in gas (methane) and coal dust, dust content up to 1200 mg / m3;
• lack of sharp shocks (blows and strong shaking);
• the working position in space is horizontal, deviation from the working position by no more than 15 ° in any direction is allowed;
• the starter operates normally at a voltage of 85 to 110% of the rated voltage and does not turn off when the voltage drops to 70% of the rated voltage for a short time (not more than 1 s).