Advantages and Disadvantages of Different Types of Neutral ...

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Resolve NEC requirement Add small 1:1 transformer <strong>and</strong> solidly ground secondary for 1Φ loads (i.e. lighting). 76
High Resistance Grounding What if no neutral exists (i.e. delta systems)? – A grounding transformer is installed (either a zig-zag or a wye-delta) from all three phases to create an artificial neutral for grounding purposes only. AØ BØ CØ AØ BØ CØ AØ BØ CØ Zig-Zag Grounding Transformer HRG HRG HRG Wye-Delta Grounding Transformers Broken Delta Grounding Transformers 77
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Advantages and Disadvantages of Dif
Page 3 and 4:
POWER SYSTEM GROUNDING Power system
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Are You at Risk? Do you use electri
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POWER SYSTEM GROUNDING SYSTEM FAILU
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Bolted Faults Result from a solid c
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Arc Fault Usually caused by insulat
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Arcing Ground Faults Intermittent o
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Industry Recommendations IEEE Std 2
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THE UNGROUNDEDED POWER SYSTEM 18
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UNGROUNDED SYSTEM NORMAL CONDITIONS
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UNGROUNDED SYSTEM GROUND FAULT ON P
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THE UNGROUNDED POWER SYSTEM GROUND
Page 26 and 27: THE UNGROUNDED POWER SYSTEM ADVANTA
Page 28 and 29: THE SOLIDLY GROUNDED POWER SYSTEM 2
Page 30 and 31: SOLIDLY GROUNDED SYSTEM THREE PHASE
Page 32 and 33: SOLIDLY GROUNDED SYSTEM LINE - GROU
Page 34 and 35: SOLIDLY GROUNDED SYSTEM LINE-LINE S
Page 36 and 37: Industry Recommendations IEEE Std 1
Page 38 and 39: THE SOLIDLY GROUNDED POWER SYSTEM D
Page 40 and 41: Reactive Grounding Uses reactor not
Page 42 and 43: LOW RESISTANCE GROUNDING OF POWER S
Page 44 and 45: LOW RESISTANCE GROUNDED ZERO SEQUEN
Page 46 and 47: HIGH RESISTANCE GROUNDING OF POWER
Page 48 and 49: No Single Phase Loads No line-to-ne
Page 50 and 51: HIGH RESISTANCE GROUNDING - GROUND
Page 52 and 53: HIGH RESISTANCE GROUNDED SYSTEM LIN
Page 54 and 55: HIGH RESISTANCE GROUNDING 54
Page 56 and 57: THE HIGH RESISTANCE GROUNDED POWER
Page 58 and 59: THE HIGH RESISTANCE GROUNDED POWER
Page 60 and 61: HOW DO YOU FIND GROUND FAULTS? Ungr
Page 62 and 63: PROCEDURE FOR LOCATING GROUND FAULT
Page 64 and 65: Fault Location Method to quickly lo
Page 66 and 67: Per IEEE… TO HRG OR NOT TO HRG? I
Page 68 and 69: Per IEEE… TO HRG OR NOT TO HRG? I
Page 70 and 71: Duty Ratings for NGR’s IEEE Std 3
Page 72 and 73: HIGH RESISTANCE GROUNDING OF A 2400
Page 74 and 75: THE HIGH RESISTANCE GROUNDING OF PO
Page 78 and 79: Minimum Specifications 120 Volt Con
Page 80 and 81: HIGH RESISTANCE GROUNDING - 2.4KV S
Page 82 and 83: HIGH RESISTANCE GROUNDING 2.4KV SYS
Page 84 and 85: HIGH RESISTANCE GROUNDING - 2.4KV S
Page 86: GENERATOR APPLICATONS OF NEUTRAL GR
Page 89 and 90: Generator Grounding - IEEE IEEE Std
Page 91 and 92: AIC Rating (Amps Interrupting Curre
Page 93 and 94: HYBRID SYSTEM 93
Page 95: Common options Enclosure rating Enc
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Advantages and Disadvantages of Different Types of Neutral ...

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