Automatic control station for belt conveyor type SAU-LK
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The station is designed for stepless electrical speed or torque control of a single or multi-motor belt conveyor drive and for supplying power to all conveyor auxiliary devices. The conveyor can be located in underground mine workings, hazardous in terms of gas and coal dust, and not hazardous with respect to explosion of gas, steam or coal dust, on the surface of mines, open-pit mines, quarries and mines. The station is associated electrical equipment, has the explosion protection marking [Ex ia ap is] 1 X and can be installed on the surface of mines or mines outside the explosive zones. Intrinsically safe electrical circuits and circuits of fiber-optic communication systems departing from the station can be connected to intrinsically safe electrical circuits and circuits of fiber-optic communication systems laid in underground workings of mines and mines
Specifications
| No. p / p | Main technical parameters: | Value |
|---|---|---|
| one | Rated power of the station, kVA | up to 10,000 |
| 2 | Rated voltage of the connected electric motor of the conveyor drive, kV | to 10 |
| 3 | Rated power supply voltage of the station, kV | to 10 |
| four | Supply voltage frequency, Hz | fifty |
| five | Permissible voltage difference between phases, no more,% | 2 |
| 6 | Torque control range on the conveyor drive motor shaft,% | 0..100 |
| 7 | Range of speed control of the conveyor drive motor shaft,% | 0..100 |
| 8 | Overload capacity of the frequency drive,% for 1 min. | 150 |
| 9 | Voltage of control and signaling circuits, V | 24/127/220 |
| ten | Lighting circuit voltage and station heating, V | 220 |
| eleven | Air conditioning circuit voltage, V | 220 / Z80 |
| 12 | Explosion protection marking | [Ex ia ap is] l X |
| thirteen | Ambient temperature range | -60 .. + 40 |
| 14 | The degree of protection against external influences according to GOST 14254-96 | IP21 |
| 15 | The full service life of the station is, years | 15 |
The station performs the following main functions:
- monitoring and control of speed 0 "100% and torque 0" 100%, connected electric motors of the drives of the belt conveyor from the nominal values;
- protection of electric motors (conveyor drive and additional equipment) and cables supplying them from short-circuit currents, overload, overheating and phase loss, overturning and failed start, as well as zero protection;
- protection of the electric motors of the conveyor drive and the cables supplying them from switching on the voltage at a reduced insulation resistance relative to earth; total disconnection time of protection against short-circuit currents no more than 0.2 s;
- protection of the outgoing electrical network from current leakage to earth;
- protection against short-circuit currents by automatic switches;
- automatic control of the mode of operation of asynchronous motors of conveyor drives, according to commands for switching on or off from the control system of the conveyor line;
- diagnostics of the state of internal and external circuits;
- visualization and diagnostics of the state of control, monitoring and protection equipment;
- transmission of data on the operation of the station and controlled electric motors via Ethernet via a fiber-optic communication line;
- data transmission via intrinsically safe RS-485 interface ModBus protocol
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