PDA

View Full Version : System Modeling and Calculations

  1. 2 second clearing time cut off??
  2. Utility Short Circuit Current
  3. Transformers smaller than 125KVA, 208V
  4. Arc Flash Study Scope and Level of Detail
  5. Motor Contribution
  6. Motor Contribution and Fault Current
  7. Generator Modeling
  8. What to do line side of Main?
  9. Clearing Time Upstream of Transformer
  10. Voltage transformer studies
  11. Short-Circuit Cutoff Levels
  12. Heat Flux formulas
  13. arc flash calcs...
  14. Is Incident Energy Additive?
  15. 208V 125KVA Transformer Increased Clearing Time
  16. Cleared Fault Threshold 80%
  17. Last Protective Device Question
  18. Unknown Motor Contribution
  19. Wilkins' formula
  20. Cable Length Accuracy
  21. 4160V Minimum PPE Levels
  22. Arc flash data collection
  23. 208V equipment fed from 750kva 600/208V transformer
  24. Getting Started!
  25. The 208 V vs. 240 V less than 125 kVA transformer debate
  26. 1000 second clearing time
  27. Motor Size
  28. Derating Factor (X/R ratio)
  29. How far down for 208V?
  30. Questions on How to Handle
  31. Transformer Nameplate
  32. What is the best way to get started?
  33. modeling AC and DC drives' buses in software
  34. An Odd Ball
  35. Main Circuit Breaker in Panelboard
  36. HP of hermetic refrigerant motor-compressors
  37. Transformer grounding
  38. VFDs
  39. Doubts about the future of Arc Flash Analysis
  40. How to calculate IE
  41. Busduct concern
  42. Arc Flash Calculation Question
  43. Lock-out relays
  44. Labeling Tie Breakers
  45. Transformer Fault Current
  46. UPS Modeling
  47. System Grounding
  48. New to arc flash analysis
  49. Incident Energy andCL Fuse Equations
  50. MV Padmount Equipment
  51. Transformer Fault current
  52. Utility supplied fault calculations
  53. When Only Utility Short Circuit Current Provided
  54. Arc Flash Protection Boundary question
  55. Arc-Flash Hazard to IEEE1584 - Assumptions
  56. interrupting time
  57. interrupting time poll
  58. how to calculate SLG X/R from utility info?
  59. Clearing Time
  60. Single Phase VFD's
  61. Substation Transformers - AF Boundary
  62. Utility Data
  63. 208V low arc current long clearing time
  64. Arc Flash Analysis for Existing System
  65. Fused Switches; Different Fuse Types
  66. Fault Clearing Times
  67. Modeling 2 pot open delta
  68. Solid State Overload Relays
  69. Overdutied Device Interrupting Ratings
  70. Utility Breaker Clearing Time
  71. 3-Phase Transformer Model