Control Station

Control Station is designed for remote control (switching on and off), protection of asynchronous electric motors with short-circuited rotor (from 1 to 10 pc) against overload currents and short-circuiting, and diverging connections in mine electric networks with transformer insulated by neutral.

  • compact station with automatic switch and light transformer for control of cutter-loader, adzing machine and refrigerating unit;
  • compact station for control of face conveyer with transformer (P=40 kVA, U= 1140/660 V);
  • compact station for control of face and gate conveyers;
  • compact station for control of filling raise complexes.

STATION CAN BE DELIVERED IN NORMAL AND EXPLOSIONPROOF TYPES

DISTINGUISHING FEATURE OF CONTROL STATIONS OF NORMAL TYPE IS ELECTRICAL CIRCUIT THAT PROVIDES:

  • switching on and off power contactors according to set algorithm;
  • switching on and off power contactors without supplying voltage to power circuit (testing);
  • possibility of connecting remote control panels;
  • intrinsically safe inputs for connection of external control circuits;
  • intrinsically safe outputs for generation of signals on the state of power contactors.

ON TOP OF CONTROL FUNCTIONS THE STATION ELECTRIC CIRCUIT PROVIDES:

  • protection of diverging power circuits against short-circuit currents;
  • protection of diverging power circuits against current overload;
  • protection of connected equipment against impermissible overheating;
  • protection against breaks and short-circuiting ;
  • protection against self-actuation when supply voltage increases over 150% of the rated value;
  • protection against breaks, short-circuiting or rise of resistance over permissible level of the grounding circuit of diverging connections;
  • interlock preventing actuation of taps during damage or degradation of insulation in tapping circuits against ground below permissible level;
  • protection against current leaks in the internal power circuits 42 V and 220 V;;
  • protection against current leaks in diverging connections and “5 meter long section” of supply line;
  • zero protection;
  • indication of supply network voltage;
  • indication of protections actuation;
  • indication of taps actuation;
  • verification of protection operation.

ON TOP OF CONTROL FUNCTIONS IN DOWNSTREAM CIRCUITS 127V AFTER ILLUMINATION TRANSFORMER:

  • protection against current leaks;
  • interlocks preventing taps actuation upon damage or deterioration of downstream circuits insulation against ground below permissible level;
  • protection against break out, short-circuiting or resistance rise over permissible level of grounding circuit of downstream connections;
  • protection against short-circuit currents of downstream circuits;
  • protection against overload of downstream circuits current.

OPERATING CONDITIONS:

  • underground mine workings, salt mines including, aired by flow of fresh air due to general shaft depression
  • ambient temperature, 0C – from –5 to 35;
  • relative air humidity at ambient temperature (25+/-2) 0C, % - (98+/-2);
  • atmospheric pressure , kPa – (99.75 +/- 13.3);
  • air dust level, maximum, mg/m2 – 1500;
  • vibration, maximum, Hz – 25;
  • acceleration at vibration, maximum, m/s2 – 10
  • absence of jerks and shocks;
  • working position in space – vertical; deviation of working position by no more than 150 to each side is allowed;
  • permissible fluctuations of supply network voltage – from 85 to 110% of rated value.

“KEYTRADE” Ltd.

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Dzerzhinsky Avenue, 69, office 321

Minsk, 220116, Republic of Belarus

Phone: (+375 17) 277-03-01

Fax: (+375 17) 277-02-96

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