Purpose of the development: CPG is a key node in the NSR. High-voltage starters (CPG) on the basis of three-phase thyristor high voltage regulator with quasi frequency control mode designed for "soft" start-up and braking of synchronous and asynchronous high-voltage AC motors 3, 6, 10 kV power from 250 kW to 12.5 MW in electric The fan the load.

Recommended application field: Metallurgy. Mechanical Engineering. Energy. Chemical and cement industries.

Technical characteristic: Specifications CPG: CPG provides asynchronous and quasi frequency start synchronous and asynchronous motors with limited amplitude inrush current. Start engine should be in the lowest level of load and moment of resistance is not greater than 0.4 * Mnom. During the start-up is provided by: - Limiting inrush current motor at a given level in the range Ip = (1.5 ... 3.0) Ir.; - Limiting inrush current (torque) during start-up, compared with direct start; - Reduction of the dynamic moments in striper "engine" - a "mechanism" in comparison with direct start; - Reducing inrush surge currents switching equipment, compared with direct start; - Reduction of losses in the stator winding and rotor at start (using the quasi frequency mode) compared to direct start; - Allowable number of starts to 12 per hour (in the mode of quasi frequency start); CPG has a local and a remote control and provides a link to an external automation system via a communication interface RS 232,485.

Advantages over analogues: CPG will provide the following protections: - Overload (time-current); - Overcurrent protection; - Protection against excessive number of failed thyristors; - Protection from one branch of the conduction abnormalities of the main circuit (protection against single-wave mode); - Protection from faulty power supply management system; - protection from extinction or undervoltage own needs; - Protection of the door power cabinet in the presence of high voltage. If you start the engine has not been completed within the specified time, the emergency stop command is issued with details of the reasons for the stop and the display. CPG has light alarm: - The presence or absence of high voltage at the terminals of the cabinet; - The presence or absence of operational voltage of 380 V; - Closing the doors of cabinets; - The ready TLU.

The development stage readiness: Ready for application

Technical and economic effect: CPG provides a "soft" start and unstressed turn to podsinronnoy speed drive motor. After starting the drive motor switches to the network and is loaded. The use of high-voltage starters can almost lift the restrictions on the number of starts during the operation and adjust the performance of the entire plant. High-voltage starters CPG, compared with classical transmitters, using them as starters, are of low cost, small size. In the reconstruction of existing enterprises, as a rule, use the existing space due to small dimensions TLU. This ensures minimum payback period for implementation.

Description of the development:
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Main circuit RCD - is based on the anti-parallel connected thyristors, included in each of the three motor phases. Structurally, CPG is a cabinet (shield) bilateral service. Execution of the cabinet according to the degree of protection according to GOST 14254-96 - IR21, except where they exit the cooling air and cable connections, where permitted pursuant class IR00. The cabinet CPG provides high-bay, low-voltage compartment and control module. Cooled thyristor by using fans mounted on top. Intake of cooling air is out of the room, where it was established CPG through the cabinet door (shield). Air exhaust into the room through the fan. CPG completed microprocessor control system, which allows for the original control algorithms, in particular the quasi frequency control motor current, which significantly (several times) reduced losses in the windings of the motor during starting. New management principles, implemented with the help of a high-speed microprocessor control system, given the properties of CPG drive. This allows for a start-up (0.7-0.8) ni form quasi-harmonic currents in the windings of the motor with a frequency proportional to engine speed. Because of this heat in the rotor is close to the value of the operation to the drive, and the torque of the motor at the same current magnitude higher than traditional soft-starters.

corresponds technical description
Ready for implementation

Possibility of transfer abroad:
Licence's sale
Technological document's sale
Creation of joint enterprise
Realization of finished commodity

Photo

Country Ukraine

For additional information turn to:
E-mail: gal@uintei.kiev.ua