3.6.3Three-Phase Power Imbalance

Current imbalance should not exceed 5% of the average three-phase current. The current imbalance can be calculated as follows:

STEPS

1.Measure the current through each of the three legs.

2.Determine the average of the three currents.

3.Determine the difference between the current in each leg and the average of all three legs.

4.Take the difference with the largest value, and divide it by the average current. Multiply by 100 to obtain the current imbalance percentage.

5.If the current imbalance is greater than 5%, “roll” the leads and re-test (Figure 3.7, “Rolling” the Leads to Balance Current Draw). If “rolling” the leads does not correct the problem, the source of the imbalance must be located and corrected. For more information on current imbal- ance, refer to the motor operation manual.

Figure 3.7

“Rolling” the Leads to Balance Current Draw

3.6.4Wire Sizing

For correct power lead sizing from the power source to controls and motor, refer to the motor installation manual or local electrical codes.

12

Page 18
Image 18
GE QS2800V, QS1800V manual Rolling the Leads to Balance Current Draw

QS1800V, QS2800V specifications

The GE QS1800V and QS2800V are part of General Electric's advanced line of gas turbine technology, designed for efficiency and reliability in power generation. These turbines are primarily utilized in industrial and utility-scale applications, providing robust solutions to meet growing energy demands.

The QS1800V boasts a power generation capacity of approximately 1800 kW, while the QS2800V steps up to about 2800 kW. Both of these models are engineered for flexible operation, allowing them to integrate seamlessly into varying grid conditions and supporting fluctuating energy requirements.

One of the standout features of these turbines is their state-of-the-art aerodynamic design, which enhances efficiency by optimizing airflow through the turbine stages. This design leads to a significant reduction in fuel consumption and emissions, aligning with the increasing global need for cleaner energy solutions.

The combustion technology employed in the QS series features low-NOx (nitrogen oxides) burners, which contribute to minimized environmental impact by significantly reducing harmful emissions without compromising performance. This makes the QS1800V and QS2800V ideal for both regulatory compliance and consumers looking for sustainable power options.

In terms of reliability, GE has incorporated advanced materials and manufacturing processes in the construction of the QS series turbines. The use of high-performance alloys and coatings increases the lifespan of critical components, ensuring reduced downtime for maintenance and repairs. The turbine’s modular design further enhances maintainability, allowing for easier access to components and streamlined servicing.

The control systems for the QS1800V and QS2800V turbines feature sophisticated automation technology that ensures optimal operation under various load conditions. Advanced sensors and monitoring systems provide real-time data, enabling predictive maintenance strategies that can help operators avoid costly outages.

Furthermore, the QS series is designed for adaptability, making it compatible with renewable energy sources. This capability allows for hybrid systems that can integrate wind or solar power, providing a comprehensive solution for modern energy demands.

In summary, the GE QS1800V and QS2800V are advanced gas turbines that combine efficiency, sustainability, and reliability, making them a top choice for power generation in various applications. They stand out in their class with technologies that not only meet current energy needs but also pave the way for future advancements in cleaner and more efficient power generation.