In world of industrial electrical engineering, the efficiency and reliability of drive systems are crucial. Start-up of induction motors, especially high-power ones, requires limiting of starting currents that can negatively affect the supply network and the motor itself. One of popular and proven solution is the use of a star-delta 0-Y-Δ system, which requires appropriately selected contactors.
In world of industrial electrical engineering, the efficiency and reliability of drive systems are crucial. Start-up of induction motors, especially high-power ones, requires limiting of starting currents that can negatively affect the supply network and the motor itself. One of popular and proven solution is the use of a star-delta 0-Y-Δ system, which requires appropriately selected contactors.
The star-delta 0-Y-Δ system involves changing the configuration of the motor windings during start-up. In the first phase, windings are connected into a star configuration, which reduces the supply voltage and limits the starting current to about 1/3 of the current value for direct start-up. Once the motor has reached the appropriate rotation speed, windings are switched to a delta configuration, which allows full use of the motor power. It is important that the supply voltage is equal to the rated voltage of the stator windings connected in a delta.
To execute a 0-Y-Δ star-delta configuration, it is necessary to have three contactors:
While selecting contactors for a 0-Y-Δ star-delta system, the following parameters should be considered:
Tripus Company, with experience in the production of switches, offers a wide range of products dedicated to star-delta 0-Y-Δ systems in both manual and automatic switch systems. Our switches and contactors are characterized by high quality, reliability and durability, which guarantees safe and efficient operation of drive systems of our customers.
Star-delta starting system, in combination with properly selected Tripus switch, is the optimal solution for starting high-power induction motors. This solution allows to effectively reduce inrush currents, increasing durability of the motor and ensure reliable operation of the drive system.
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