Dan Carnovale, Director Eaton Experience Centers, demonstrates calculations that are key to understanding power systems and commonly used by electrical consultants. These formulas are focused on three-phase power components, specifically transformers and motors.
Dan starts off by explaining the importance of the three-phase power analysis formula and why one-line diagrams are helpful to have.
Transformer calculations cover:
• Dry-type (standard and isolation transformers)
• Pole-mounted transformers (single-phase and three-phase)
• Pad-mounted transformers
• Substation transformers
Specifically, we calculate full load amps on the primary and secondary, fault current on the secondary, and breaker/fuse size and kA rating. Dan also talks about infinite bus and what that means for impedance.
For motors starting calculations:
• Simplified motor starting analysis (hand calculations and thresholds of concern)
• Formal motor starting computer simulations
• Demand charges
• Motor inrush
And lastly, Dan discusses the power triangle (real power, reactive power and apparent power) and give examples of power factor correction.
This video is a great introduction to power system calculations or if you’ve ever asked yourself one of these questions:
• How to calculate power, current, voltage?
• How to calculate load current?
• How do I calculate full load amps?
• How do I calculate power factor?
• How do I calculate power?
• How do I calculate on a per unit system?
• How do I calculate transformer ratings?
• How do I calculate motor inrush current?
• How do I calculate impedance?
• How do I calculate demand charges?
• Why do the lights flicker?
• What is a per unit system?
• What is power factor?
• What is kVA?
Thank you for watching one of our many educational videos on the topic of power systems.
Schedule a visit to one of Eaton's Power Systems Experience Centers in either Pittsburgh or Houston to learn more!
To learn more about Eaton products and our Power Systems Experience Centers: eaton.com/experience
To view more educational videos from Eaton's Power Systems Experience Centers: videos.eaton.com/experience
#powersystem #electricalengineering #engineering #eatonexperience #experiencecenter
0:00 - Introduction
1:28 - 3-phase calculations
5:35 - Transformer calculations
15:52 - Dry-type transformers
22:22 - Isolation transformers
28:40 - Pole-mounted transformers split-phase
35:00 - Pole-mounted transformers 3-phase
38:30 - Pad-mounted transformers
45:55 - Two transformers in series
50:38 - Motor starting analysis (in-rush current)
57:28 - Power factor
01:02:24 - Basic rules of thumb
Негізгі бет Ғылым және технология Power systems: formulas and calculations you should know for transformers and motors
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