D0101-210

15 JAN.2015 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang DH1/A3-C2/DE/E/1412 18 DEC.2014 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang DH1/A3-C2/DE/E/1374 11 NOV.2014 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang 23 MAY.2014 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang DH1/A3-C2/DE/E/0957 15 Apr.2014 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang DH1/A3-C2/DE/E/0829 10 Mar.2014 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang DH1/A3-C2/DE/E/0776 26 JAN.2014 Yang Sirui Qin Gaoyuan Sun Jingyu Zhou Xiang First issue DATE PREPARED BY CHECKED BY REVIEWED BY APPROVED BY DESCRIPTION Update OWNER VIETNAM ELECTRICITY THERMAL POWER PROJECT MANAGEMENT BOARD CONSULTANT POWER ENGINEERING CONSULTING JOINT STOCKCOMPANY CONTRACTOR DONGFANG ELECTRIC CORPORATION LIMITED SUBCONTRACTOR GUANGDONG ELECTRIC POWER DESIGN INSTITUTE EVN Ref No.: DH1/TD/795/023/001/00 DEC Ref No.: DH1_DDBSE3_D_0101_210 PROJECT: Document Status: DUYEN HAI THERMAL POWER PLANT PROJECT CONTRACT NO.： DH1-30032010 FOR APPROVAL Document Title: Cable Sizing Study For 400V/230V Cable Of Turbine House Area Document No.: Rev.: F4281S-D0101-210 DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study CONTENTS   General Introduction 3  Reference Documents 3  Cable Sizing Criteria 3  Cable Installation Method 4  Voltage Drop 5  Current Carrying Capacity 6  Short Circuit Calculation 7  ATTACHMENT Table of Cable Sizing Calculation 8  DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study General Introduction The purpose of this document is to show the cable selection methods for cable sizing and cable voltage drop calculation for MV and LV Power Cable including 6.6kV AC power cable and 0.6/1kV AC power cable.data Input: For sizing of the cables the following conditions will apply: a) Soil temperature for cables Not less than 30 °C at 1m depth direct buried or indirect buried ducts b) Soil thermal resistivity (Refer 1.2 °C cm/W ~(converts Kevin Unit According to SSP E- 210 Cable and 1.2Km/W) wire, item 3.2.2-Cable rating) c) Group de-rating According to Manufacture’s IEC 60087 or recommendations (which ever method gives the lowest result) d) temperatures for different In the air :30°C applications In the soil: 30°C Reference Documents - EPC Contract Technical Specification (Part VII) - POWER CABLE LIST (F4281S-D1114) - Short-Circuit Analysis Report (F4281S-D0101-203) - Documents for Relevant Load List (F4281S-D0310-201,202,203) - Technical specification for power cables(DH1-DE-A3-TD-E-0094) Cable Sizing Criteria  IEC60364-5-52Electrical_installations_of_buildings_–Part_5-52Selection_ DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study and_erection_of_electrical_equipment_–Wiring_systems  IEC 60502 Power cables with extruded insulation and their accessories for rated voltages from kV up to 30 kV  IEC 60909-0 Short-circuit currents in there-phase a.c systems – calculation of currents  IEC 60909-1 Short-circuit currents in there-phase a.c systems – Factors for the calculation  IEC 60909-2 Electrical equipments – Data for Short-circuit current calculations  IEC 60909-3 Short-circuit currents in there-phase a.c systems – currents during two separate  EC 60909-4 Short-circuit currents in there-phase a.c systems – Examples for the calculation of short-circuit currents  IEC 60332-3-23 Tests on electrical cables under fire conditions - part 324 Test for vertical flame spread of vertically  Manual of power cable Cable is sized to fulfill the criteria of both current-carrying capacity and voltage drop Cable Installation Method The following method or their combinations is generally used to install cables:  On multi-level cable trays/cable ladder which are inside trenches  In conduit  In free air, on trays, brackets, ladders, etc  In cable ducts which are underground  Underground installation: All cables shall be run in PVC pipes encased concrete duck bank  Above ground installation: All cables shall be run in Cable tray/Cable DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study ladder/Conduits made of hot dipped galvanized steel with cover Covers will be provided wherever mechanical protection is required According to the cable tray/Cable ladder/Conduit routing Drawings All calculation for specific cables are based on the installation method that has the most stringent cable sizing requirements in its cable route Voltage Drop 5.1 Voltage Drop Of Normal Operation State The voltage drop is calculated in percentage of the rated nominal voltage The Calculation checks whether the voltage drop is within the required voltage drop tolerance, namely 3% of rated nominal voltage Voltage drop is defined by: ∆U V √3 I L R cos X sin Where:  R and X (_/km) are the resistance and reactance of a cable per kilometer; R apply for the cable resistance of 90℃ The converting process for resistance from 20℃ to 90℃ is as following: ρ: Cable resistance for meter mm2 cable (Ω) ρ ρ α θ 20 ρ : cable resistance for meter mm2 cable (Ω) at 20℃ ρ copper 0.01851 for 4  α: Temperature factor; α = 0.00393, for copper θ : Conductor maximum temperature in rated conditions (℃). In this study,  θ = 90℃ will be used  Ur is the nominal voltage of the distribution board The default value is 230V for single phase and 400V for three –phase circuit  n is the number of conductors in parallel per phase;  L (km) is the length of the conductor; DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study  U x is the voltage drop values by phase system, cross section and formation of the cable according to the most common Cos  0.85 value used for this calculation According to above equation, if the result calculated by I,b' satisfies the specification, the result calculated by I b is also satisfaction 5.2 Voltage Drop Of Starting Motor State The voltage drop is calculated in percentage of the rated nominal voltage The Calculation checks whether the voltage drop is within the required voltage drop tolerance, namely 5% of rated nominal voltage ∆U V √3 I n Voltage drop is defined by: L R cos X sin Where: R and X (_/km) are the resistance and reactance of a cable per kilometer; R apply for the cable resistance of 90℃ “n” (Starting Current/Normal Current ) and cos (Starting Power Factor ) is chosen according to the following table Motor Rating ＞25kW ＜25kW Starting Starting Power Current/Normal Factor Current 0.4 0.3 Current Carrying Capacity The current-carrying capacity of cable is according to the following manufacturer data of document F4281-GEDI-P-ZP-0076-0 Specification document of Jiangsu Jiangyang Cable Co., Ltd which is issued in letter No DH1-DE-A3-E-13-5338 DH!-DE-A3-TD-E-0084 Technical Specification of Power Cables which is issued in letter No DH1-DE-A3-E-13-0189  k is a coefficient equal to: DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study -2 for single phase two wires system; -√3 for three phase four wires system;  I b' (A) is the current drawn by the connected load considered to correction factors  For cable installed in cable tray I I k k k k1: is the correction factor refer to IEC 60502-2 TABLE B10 k2: is the correction factor for adjacent cables, refer to Chinese Standard GB50217-2007 Table D.0.6, k3:  is the Assymetrical Factor For cable installed in conduct under ground I I k k k k k k4: is the correction factor refer to IEC 60502-2, P64 TABLE B10 k5: is the correction factor refer to IEC 60502-2, P65 TABLE B13 k6: is the correction factor refer to IEC 60502-2, TABLE B.17 k7 is the correction factor refer to Chinese Standard GB50217-2007 Table D.0.6, I b is the current drawn by the connected load without consideration to correction factors Short Circuit Calculation The short circuit capacity of the cables are calculated based on the following: I = kxS/√ where t = Permissible break time after fault in seconds S = Conductor cross section in mm2 DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study I = Current on dead short circuit in A K = Constant.143 for XLPE- insulated copper wire DUYEN HAI THERMAL POWER PROJECT Cable Sizing and Cable Voltage Drop Study ATTACHMENT Table of Cable Sizing Calculation DUYEN HAI THERMAL POWER PLANT PROJECT Cable Sizing From(Source point) NO To(Destination point) Load Information Correction factor KKS Identity of Cable Description Location Description Location Input Power(kW) Power factor (Rated) Power factor (Starting) Ur(V) Ib (A) Starting Current/Norma l Current Installed current carrying Capacity Installed current/loa d current Cable Voltage Drop Steady state Cable Information Tpye of Installation K1 K2 K3 K4 K5 K6 K7 K Ib'(A) (%) Voltage (kV) Cable Construction Size of cable （mm2） Cable Cable Capaci Capaci ty of ty of 50 30 Degree Degree (A) (A) L (km) n R(Ohm/k m)at 20 Deg R(Ohm/km)at 90 Deg Cable Voltage Drop Motor Starting Busbar Voltage Drop Steady state Busbar Voltage Drop Motor Starting Total Voltage Drop Steady state Total Voltage Drop Motor Starting Short circuit current Protection device Trip time Minimum cable size S= Io√t/k (thermal stability) X(Ohm/km) ⊿Usc (%) ⊿Umc (%) ⊿Usb (%) ⊿Umb (%) ⊿Ust (%) ⊿Umt (%) （kArms） (second) （mm2） 1BFA5311 #1 400/230V TURBINE PC A 10BFA03 TURBINE HOUSE Unit steam-side vacuum pump A TURBINE HOUSE 80 0.85 0.4 400 135.85 In cable tray and Conduit / / 1.00 0.91 0.99 1.00 0.60 0.5405 227.51 167 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X150+1X70 345 421 0.033 0.124 0.1581 0.0279 0.27 1.03 2.00 10.00 2.27 11.03 30.22 0.15 81.86 1BFA5411 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5412 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5413 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5414 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5415 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5416 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5417 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 1BFA5418 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 10 1BFA5419 #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 11 1BFA541A #1 400/230V TURBINE PC A 10BFA04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.136 0.0991 0.1264 0.0281 1.25 4.95 2.00 10.00 3.25 14.95 12.01 0.15 32.54 12 1BFA5511 #1 400/230V TURBINE PC A 10BFA05 TURBINE HOUSE Unit Ventilation MCC of Turbine Building 10BJE01 TURBINE HOUSE 95 0.85 0.4 400 161.318 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 158 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.02 0.0991 0.1264 0.0281 0.16 0.61 2.00 10.00 2.16 10.61 39.90 0.15 108.06 13 1BFA5512 #1 400/230V TURBINE PC A 10BFA05 TURBINE HOUSE Unit Ventilation MCC of Turbine Building 10BJE01 TURBINE HOUSE 95 0.85 0.4 400 161.318 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 158 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.02 0.0991 0.1264 0.0281 0.16 0.61 2.00 10.00 2.16 10.61 39.90 0.15 108.06 14 1BFA5631 #1 400/230V TURBINE PC A 10BFA06 150 TURBINE HOUSE Unit #3 Turbine MCC 10BJC01 TURBINE HOUSE 73.735 0.85 0.4 400 125.209 In cable tray 0.91 0.60 0.97 / / / / 0.5296 222.92 178 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X150+1X70 345 421 0.018 0.124 0.1581 0.0279 0.13 0.52 2.00 10.00 2.13 10.52 39.26 0.15 106.32 15 1BFA5632 #1 400/230V TURBINE PC A 10BFA06 TURBINE HOUSE Unit #3 Turbine MCC 10BJC01 TURBINE HOUSE 73.735 0.85 0.4 400 125.209 In cable tray 0.91 0.60 0.97 / / / / 0.5296 222.92 178 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X150+1X70 345 421 0.018 0.124 0.1581 0.0279 0.13 0.52 2.00 10.00 2.13 10.52 39.26 0.15 106.32 16 1BFA5731 #1 400/230V TURBINE PC A 10BFA07 TURBINE HOUSE Unit #1 Turbine MCC 10BJA01 TURBINE HOUSE 51.85 0.85 0.4 400 88.046 In cable tray 0.91 0.60 1.00 / / / / 0.5460 229.81 261 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X150+1X70 345 421 0.012 0.124 0.1581 0.0279 0.06 0.24 2.00 10.00 2.06 10.24 43.36 0.15 117.43 17 1BFA5751 #1 400/230V TURBINE PC A 10BFA07 TURBINE HOUSE Unit Moisture Heating MCC 10BJD01 TURBINE HOUSE 88.8 0.85 0.4 400 150.790 In cable tray 0.91 0.60 1.00 / / / / 0.5460 263.12 174 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.023 0.0991 0.1264 0.0281 0.17 0.66 2.00 10.00 2.17 10.66 38.24 0.15 103.58 18 1BFA5831 #1 400/230V TURBINE PC A 10BFA08 TURBINE HOUSE Unit Heater of 400/230V PC Switchboard of Lighting TURBINE HOUSE 1.5 0.85 0.3 400 2.547 In cable tray 0.91 0.60 1.00 / / / / 0.5460 23.98 941 0.6/1kV Cu/XLPE ZR-YJV22-0.6/1-4X4 36 44 0.01 4.61 5.8782 0.0897 0.06 0.14 2.00 10.00 2.06 10.14 3.90 0.15 4.00 19 1BFB5211 #1 400/230V TURBINE PC B 10BFB02 TURBINE HOUSE Bunker Bay MCC A0BLA01 T6 TRANSFER TOWER 96.635 0.85 0.4 400 164.095 In cable tray 0.91 0.60 0.97 / / / / 0.5296 300.45 183 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X240+1X120 465 567 0.2 0.0754 0.0961 0.0269 1.21 4.99 2.00 10.00 3.21 14.99 10.61 0.15 28.74 20 1BFB5212 #1 400/230V TURBINE PC B 10BFB02 TURBINE HOUSE Bunker Bay MCC A0BLA01 T6 TRANSFER TOWER 96.635 0.85 0.4 400 164.095 In cable tray 0.91 0.60 0.97 / / / / 0.5296 300.45 183 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X240+1X120 465 567 0.2 0.0754 0.0961 0.0269 1.21 4.99 2.00 10.00 3.21 14.99 10.61 0.15 28.74 21 1BFB5411 #1 400/230V TURBINE PC B 10BFB04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.137 0.0991 0.1264 0.0281 1.26 4.99 2.00 10.00 3.26 14.99 11.93 0.15 32.32 22 1BFB5412 #1 400/230V TURBINE PC B 10BFB04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.137 0.0991 0.1264 0.0281 1.26 4.99 2.00 10.00 3.26 14.99 11.93 0.15 32.32 23 1BFB5413 #1 400/230V TURBINE PC B 10BFB04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.137 0.0991 0.1264 0.0281 1.26 4.99 2.00 10.00 3.26 14.99 11.93 0.15 32.32 24 1BFB5414 #1 400/230V TURBINE PC B 10BFB04 TURBINE HOUSE Unit Emergency And Safety 400/230V PC A 10BMA02 CENTRAL CONTROL HOUSE 112.482 0.85 0.4 400 191.004 In cable tray 0.91 0.60 0.97 / / / / 0.5296 255.22 134 0.6/1kV Cu/XLPE ZR-YJV22-0.6/13X185+1X95 395 482 0.137 0.0991 0.1264 0.0281 1.26 4.99 2.00 10.00 3.26 14.99 11.93 0.15 32.32