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  • 24 Bujorului Street
  • office@indaeltrac.com

Starter with IGBT chopper

  • Input voltage (rotor voltage): : Max 3x1.000 V dc
  • Supply voltage p.T unit control unit 220 V a.c (±20%)
  • 8 Phase rotor current: Adjustable 100 ÷ 650 A ac
  • Chopper working frequency 1000 ÷ 2000 Hz
  • Start time: 13 ÷ 50 sec. according to the motor load
  • Protections
    The equipment CSR-630-P is protected for accidental appearance of the following situations:
    • - exceeding of the max. current in the rotor circuit;
    • - lack of the current through the chopper for maximum 5 seconds since the fixed coil has been connected to 6 KV.
    • - outcome from the given variation range of the supply voltages of the electronic control unit and of the current transducer.

    The appearance of any failure state determines the disconnection of the fixed coil, the failure being indicated as a fault on the electronic control unit and on the equipment door, by lighting lamps.

  • Logic input (relays contacts):
    • - fixed coil contactor driving,
    • - rotor contactor driving,
    • - start/stop
  • Analogical input (permanently measured):
    • - rotor current,
    • - voltage in intermediate circuit.
  • Output
    • - fixed coil contactor control,
    • - rotor contactor control,
    • - ventilation control,
    • - damage signal.
  • Indications by lighting lamps, on the electronic control unit with programmable automaton:
    • - exceeding of maximum current
    • - protection at 5 seconds
    • - supply sources for the current transducers
    • - supply sources for the control unit
    • - power supply for the control relays RI13
    • - power supply for the relays and lighting lamps
    • - control power supply
    • - control power supply
    • - transducer power supply
    • - transducer power supply
  • Indications by lighting lamps on the equipment desk:
    • - fixed coil of the motor connected at 6 KV
    • - connected rotor contactor
    • - damage

    Rotor static converters type CSR-(100÷1000)-P are aimed to start non-synchronous motors with wound rotor supplied from ^KV, of 100÷1000 KW powers.

    • They achieve the variation on electronic way of rotor current during the starting of nonsynchronous motors with wound rotor.
    • It can be easily inbuilt in a system of supervising the coal transport and output in surface coal mining.

    The static rotor converter works inbuilt in an adequate electric circuit, according to its role in the driving assembly.

    The belt carriers are driven by non-synchronous motors with wound rotor of 630 KW whose rotors are directly connected to the electronic equipment type CSR-630-P which achieves the start. The actuation of driving motors is independent.

    After the fixed coil connection at the voltage of 6 KV, the rotor contactor being opened, the equipment CSR-630-P receives on the input terminals the maximum voltage of 1000 V ac and it begins to set the rotor circuit resistance up to the moment when the rotor voltage decreases at its minimum value. In this moment the rotor contactor receives the control to close itself, the transitive process of starting is ended and the motors operates at the nominal rotations per minute. The rise of rotor current is slow so that the motor should start without mechanic shocks to be transmitted to the driving( reducers, belt carriers, etc). During the whole start the rotor current is measured that means the reaction size for the chopper.

    The using of the equipments of CSR-(200÷1000)-P manufactured by INDAELTRAC S.A destined to start non-synchronous motors with wound rotor driving the belt carriers in surface mining exploitations has the following advantages:
    • - assures a symmetric loading on the motor phases and removes the oscillating phenomena;
    • - avoids the non-controlled current increase in the motor and implicit its destroying;
    • - sets the starting time according to the belt carrier loading;
    • - assures the same starting regime regardless the climatic conditions;
    • - saves the energy during starting;
    • - avoids any mechanic shocks and implicit protects the reducer and the rubber mat;
    • - removes stay times because of the maintenance.