Medium Voltage Application Guide

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CONTENTS 4 Switchgear ............................................................................................................................................................................ 69 4.1 Switchgear Classifications ...................................................................................................................................................................... 70 IEC Switchgear Classification ............................................................................................................................................................... 71 ANSI-defined switchgear ....................................................................................................................................................................... 72 Switchgear Ratings ..................................................................................................................................................................................... 72 Switchgear information for enquiries or ordering .................................................................................................................... 72 Switchgear derating .................................................................................................................................................................................. 73 4.2 Standard Enclosure Configurations .................................................................................................................................................. 74 Incomer Feeder Panel (IFP) .................................................................................................................................................................. 74 Direct Incomer Panel (DIP) ................................................................................................................................................................. 75 Bus Coupler Panel (BCP) ...................................................................................................................................................................... 76 Bus Riser Panel (BRP) .............................................................................................................................................................................. 77 Metering Panel (MTP) ............................................................................................................................................................................. 78 Busbar Systems ........................................................................................................................................................................................... 79 4.3 Safety Considerations .............................................................................................................................................................................. 83 Switchgear interlocking systems ......................................................................................................................................................... 83 Internal arc classification ......................................................................................................................................................................... 85 4.4 Switchgear Apparatus .............................................................................................................................................................................. 88 Medium Voltage Circuit Breakers ..................................................................................................................................................... 88 Medium Voltage Contactors ............................................................................................................................................................... 96 Medium Voltage Switches .................................................................................................................................................................. 100 Medium Voltage HRC Fuses ............................................................................................................................................................ 104 Current Transformers .......................................................................................................................................................................... 110 Current Sensors ...................................................................................................................................................................................... 119 Protection Devices ................................................................................................................................................................................. 121 Voltage Transformers ........................................................................................................................................................................... 127 Motor Line Inductors on Soft Starter Applications .............................................................................................................. 130 Medium Voltage Surge Arrestors .................................................................................................................................................. 132 Power Factor Capacitors .................................................................................................................................................................... 136 4.5 Calculations ................................................................................................................................................................................................ 143 Transformer Calculations ................................................................................................................................................................... 143 Motor Calculations ................................................................................................................................................................................. 147 Busbar Calculations ................................................................................................................................................................................ 149 Short Circuit Calculations ................................................................................................................................................................... 156 Impedance Method Calculations .................................................................................................................................................... 159 4.6 Switchgear Inspection Checklists .................................................................................................................................................... 162 Mechanical Inspection .......................................................................................................................................................................... 162 Electrical Inspection ............................................................................................................................................................................... 163 Commissioning Tools and Equipment (Typical) .................................................................................................................... 164 4.7 Switchgear-Related IEC Standards ................................................................................................................................................ 165 4.8 Comparison of IEC and IEEE Standards ..................................................................................................................................... 167 Examples of differences in rating requirements ..................................................................................................................... 167 4.9 IEC Switchgear Rating Definitions.................................................................................................................................................. 168 Voltage .......................................................................................................................................................................................................... 168 Current ......................................................................................................................................................................................................... 168 Frequency, fr (Hz) .................................................................................................................................................................................. 169 4.10 Protection index ...................................................................................................................................................................................... 170 IP Ratings ..................................................................................................................................................................................................... 170 NEMA Ratings .......................................................................................................................................................................................... 171 5 Schematic Diagrams ..................................................................................................................................................... 172 5.1 Electrical Symbols - Common Switching Functions ............................................................................................................. 172 5.2 Circuit Breaker Control (Typical) .................................................................................................................................................. 173 5.3 Contactor Control (Typical)............................................................................................................................................................. 174 5.4 Automatic Changeover Systems .................................................................................................................................................... 175 Overview ..................................................................................................................................................................................................... 175 5.5 MVS Schematic Diagrams .................................................................................................................................................................. 178 Page 2 Medium Voltage Application Guide 710-12280-00A
CONTENTS E3 panel option........................................................................................................................................................................................ 178 E2 panel option........................................................................................................................................................................................ 179 5.6 MVX Schematic Diagrams ................................................................................................................................................................. 180 Contactor panel option ....................................................................................................................................................................... 180 Circuit breaker panel option ............................................................................................................................................................ 181 6 Resources .......................................................................................................................................................................... 182 6.1 Equipment Specifications .................................................................................................................................................................... 182 6.2 Metric/Imperial Conversion Factors.............................................................................................................................................. 216 6.3 Wire Diameter Conversion .............................................................................................................................................................. 217 6.4 Incoterms .................................................................................................................................................................................................... 218 6.5 Commonly Used Abbreviations ..................................................................................................................................................... 219 7 References ........................................................................................................................................................................ 221 710-12280-00A Medium Voltage Application Guide Page 3
Page 1: Medium Voltage Application Guide
Page 6 and 7: INTRODUCTION 1 Introduction This re
Page 8 and 9: 03340.B Current Torque MOTORS magne
Page 10 and 11: Torque Current MOTORS Typical start
Page 12 and 13: 03340.B Current Torque MOTORS 2.2 M
Page 14 and 15: 13190.A Current Torque 13193.A Curr
Page 16 and 17: MOTORS How does soft start compare
Page 18 and 19: MOTORS Soft starters Electronic sof
Page 20 and 21: MOTORS Bypassed VFD installation 1
Page 22 and 23: 13473.A SOFT STARTERS Open loop sof
Page 24 and 25: SOFT STARTERS 3.2 Benefits Electric
Page 26 and 27: 13490.A 13489.A SOFT STARTERS Snubb
Page 28 and 29: SOFT STARTERS Enclosed soft starter
Page 30 and 31: 12996.A SOFT STARTERS Local control
Page 32 and 33: SOFT STARTERS Key Features MVS soft
Page 34 and 35: SOFT STARTERS Vibration ...........
Page 36 and 37: SOFT STARTERS MVX Soft Starter Over
Page 38 and 39: SOFT STARTERS General Technical Dat
Page 40 and 41: 11083.B 11082.B SOFT STARTERS Power
Page 42 and 43: 13015.A 13013.A SOFT STARTERS Soft
Page 44 and 45: SOFT STARTERS Predictive Maintenanc
Page 46 and 47: SOFT STARTERS Medium voltage starte
Page 48 and 49: STAR T STO P RESET INPU TA INPU T B
Page 50 and 51: Ready R un Trip Local 11081.C SOFT
Page 52 and 53: 13522.A 13521.A 13513.A SOFT STARTE
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09593.A Current SOFT STARTERS AC53
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09678.B Current Torque (% motor ful
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13634.A 13633.A Current (%FLC) Torq
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SOFT STARTERS Example Calculate the
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SOFT STARTERS Operating Sequence NO
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13530.A SOFT STARTERS Typical multi
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SOFT STARTERS AuCom multi-motor sta
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13531.A SOFT STARTERS Slip ring mot
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SOFT STARTERS 3.8 Common standards
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11158.A SWITCHGEAR 4.1 Switchgear C
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SWITCHGEAR ANSI-defined switchgear
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11165.A 11163.A SWITCHGEAR 4.2 Stan
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11169.A 11166.A SWITCHGEAR Bus Coup
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11174.A 11173.A SWITCHGEAR Metering
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SWITCHGEAR Design Busbar system des
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SWITCHGEAR Resonant frequency The b
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SWITCHGEAR Interlock scheme 1: Two
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SWITCHGEAR Causes of internal arc T
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13716.A Current 13680.A SWITCHGEAR
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11163.A SWITCHGEAR When a withdrawa
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13720.A Percentage DC component SWI
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13722.A Voltage SWITCHGEAR Transien
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13681.A SWITCHGEAR Medium Voltage C
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13684.A Maximum cut-off current (kA
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13688.A 13689.A 13691.A 13690.A 136
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SWITCHGEAR IEC Ratings Disconnector
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Pre-arcing time (seconds or minutes
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SWITCHGEAR Nominal current, In (A)
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13745.A Fuse rating (A) 13697.A Fus
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SWITCHGEAR Current Transformers A c
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Flux () SWITCHGEAR Exercises 1. A C
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SWITCHGEAR Class type Use a meterin
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SWITCHGEAR Exercise 2: Protection C
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SWITCHGEAR NEMA/IEEE Ratings These
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13752.A SWITCHGEAR flux). The secon
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13761.A 13760.A 13758.A 13759.A SWI
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13754.A SWITCHGEAR Distance This pr
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Incomer feeder panel Transformer Mo
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SWITCHGEAR Many manufacturers use a
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13766.A SWITCHGEAR Motor Line Induc
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Magnitude of overvoltage /p.u. Line
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SWITCHGEAR Exercise A 17.5 kV secon
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13807.A 13808.A SWITCHGEAR Power Fa
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SWITCHGEAR Exercise Calculate the t
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13812.A SWITCHGEAR Calculations: pe
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SWITCHGEAR Step 3: Calculate the eq
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13847.A SWITCHGEAR The calculated s
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SWITCHGEAR Transformer internal imp
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SWITCHGEAR Exercise For a motor run
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SWITCHGEAR The total coefficient fa
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SWITCHGEAR Short-time withstand cur
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14009.A SWITCHGEAR Mechanical stren
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SWITCHGEAR Resonant frequency The b
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Current 13850.A SWITCHGEAR Synchron
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13854.A 13852.A 13853.A SWITCHGEAR
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SWITCHGEAR 4.6 Switchgear Inspectio
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SWITCHGEAR Commissioning Tools and
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SWITCHGEAR 62271-302 High voltage s
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13856.A 13855.A SWITCHGEAR 4.9 IEC
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SWITCHGEAR 4.10 Protection index IP
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SCHEMATIC DIAGRAMS 5 Schematic Diag
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14043.A 14042.A SCHEMATIC DIAGRAMS
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14046.A 14045.A SCHEMATIC DIAGRAMS
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14049.A SCHEMATIC DIAGRAMS 5.5 MVS
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14051.A SCHEMATIC DIAGRAMS 5.6 MVX
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RESOURCES 6 Resources 6.1 Equipment
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CONTENTS Contents Introduction ....
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2. ENVIRONMENTAL SPECIFICATIONS Env
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LOGIC CONTROL CONFIGURATION 3.2 Ope
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LOGIC CONTROL CONFIGURATION 3.6 Met
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SPECIFICATION: MVX Solid State Redu
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1. 1. INTRODUCTION Introduction 1.1
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ENVIRONMENTAL SPECIFICATIONS The eq
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LOGIC CONTROL CONFIGURATION 3.2 Ope
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LOGIC CONTROL CONFIGURATION 3.6 Met
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SPECIFICATION: Power factor Correct
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1 INTRODUCTION Introduction 1.1 Sco
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3 SUPPORT AND SERVICES Support and
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CONTENTS Contents Introduction ....
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2. DOCUMENTATION Documentation 2.1
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3.2.2 MV Equipment a) Circuit break
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ELECTRICAL SUPPLY 9. Circuit breake
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RESOURCES 6.2 Metric/Imperial Conve
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RESOURCES 6.4 Incoterms Internation
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RESOURCES kW Active power unit LRC
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