Advantages and Disadvantages of Different Types of Neutral ...

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THE HIGH RESISTANCE GROUNDING OF POWER SYSTEM The high resistance grounded power system is the “the best”. This system provides the following advantages: 1. No shutdowns when a ground fault occurs 2. Quick identification of the problem 3. Safer for personnel & equipment 4. Offers all of advantages of the ungrounded & solidly grounded systems 5. No known disadvantages 74
Retrofit from Solidly or Ungrounded Grounded System to High Resistance Design Considerations 1. Are cables rated line to line or line to neutral. On a 480 Volt system some people have installed 300 Volt cable. 2. Are there surge arrestors and MOV’s on the system. Are they sufficiently rated? 3. Are the Neutrals on the transformers fully insulated? 4. Are there other sources of power on the circuit? Generators or Tie Breakers 75
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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
Page 24 and 25: 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 76 and 77: Resolve NEC requirement Add small 1
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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