Short Circuit Calculation Report

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0

0 04.04.2016

04.04.2016

First

First Submission.

Submission.

Rev.

Date

Rev.

Date

JS

PCP

Remarks/Reasons for Revision

Prepared

Checked

Approved

Prepared

Checked

Approved

CLIENT

CLIENT :

:

HINDUSTAN

HINDUSTAN ZINC

ZINC LIMITED

LIMITED

CONSULTANT

CONSULTANT:

:

DEVELOPMEN

DEVELOPMENT

T CONSULTAN

CONSULTANTS

TS PVT.

PVT. LTD.

LTD.

TITLE

TITLE :

:

SHORT

SHORT CIRCUIT

CIRCUIT CALCULATION

CALCULATION

PLANT : 1.5 MTPA LEAD-ZINC BENEFICIATION PLANT

AT S.K.MINES, RAJASTHAN

L&T DOC. No.

DRAWING ISSUED FOR

APPROVAL

REFERENCE/INFORMATION

CONSTRUCTION

DISTRIBUTION

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L&T

L&T Document Document No.: No.: Rev. Rev. No. No. 00 PREPARED

PREPARED BY BY REVIEWED REVIEWED BYBY

Short circuit calculation is worked out considering the following conditions:

1. 1. We have considered 1000MVA as source fault level of grid as IS

We have considered 1000MVA as source fault level of grid as IS 2026-I,1977

2026-I,1977

2. 2. Cables are not considered, however this will

Cables are not considered, however this will reduce further SC level.

reduce further SC level.

3. 3. Lumped load at 0.415kV bus is derived from Latest load list.

Lumped load at 0.415kV bus is derived from Latest load list.

4. 4. SC calculations are done in accordance with IEC 60909

SC calculations are done in accordance with IEC 60909

Detailed short circuit calculation result for each bus is indicated as below:

Sr.

Sr. No.

No.

Bus

Bus levels

levels

Rated Fault level

(RMS)

Type of Fault

Attained

Fault Level

as per

calculation

1

1 6.6kV,

6.6kV, {with

{with 33

33 kV

kV I/C-2

I/C-2 open

open &6.6kV

&6.6kV

us coupler closed}

40

40 Symmetrical 3

Symmetrical 3

phase

23.16 KA

2

2 6.6kv

6.6kv {with

{with 33kV

33kV I/C

I/C -2

-2 Closed

Closed &

& 6.6kV

6.6kV

us coupler open}

40

40 Symmetrical 3

Symmetrical 3

phase

20.9 KA

(3)

PMCC- 2 MAIN PROCESS -ECR

PMCC-3 SER/TER HOUSE PMCC- 1 MAIN PROCESS-EPR 0.433 kV 8 4 .7 0.433 kV 0. 04 k V 4 2 0.433 kV 0. 0 7 k V 4 1. 2 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0. 0 7 k V 4 1. 2 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0. 0 7 k V 4 1. 2 TR#2 2 MVA BusDuct8 TR#3 2 MVA BusDuct14 7.8 Lump4 1. 5 MVA 7.8 Open Lump3 0. 5 MVA Lump2 0. 5 MVA Open Lump1 1. 5 MVA 7.8 7.8 BusDuct7 TR#1 2 MVA TR#5 2 MVA BusDuct11 TR#6 2 MVA BusDuct10 Lump8 1. 5 MVA Open Lump7 0. 5 MVA Lump6 0. 5 MVA Open Lump5 1. 5 MVA 7.8 7.8 BusDuct9 TR#4 2 MVA Open Lump9 900 kVA 4.99 4.99 BusDuct12 TR#7 2 MVA fl oat air blower -1

750 kW ball mil l

2850 kW regrind mil l 375 kW

Float air blower-2 750 kW Secondary c one crusher

200 kW TR#8 2 MVA BusDuct15 Lump10 900 kVA Lump1 1. 5 MVA Lump2 0. 5 MVA Lump3 0. 5 MVA Lump4 1. 5 MVA Lump5 1. 5 MVA Lump6 0. 5 MVA Lump7 0. 5 MVA Lump8

1. 5 MVA 900 kVALump9

Lump10 900 kVA TR#1 2 MVA TR#2 2 MVA TR#3 2 MVA TR#4 2 MVA TR#5 2 MVA TR#6 2 MVA TR#7 2MVA TR#8 2 MVA 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV fl oat air blower -1

750 kW ball mil l

2850 kW regrind mil l

375kW Secondar yconecr usher

200 kW 750 kWFloat air blower-2

0. 04 k V 4 2 0. 0 7 k V 4 1. 2 0. 0 7 k V 4 1. 2 0. 0 7 k V 4 1. 2 8 4 .7 BusDuct7 BusDuct8 7.8 Open Open 7.8 BusDuct9 7.8 Open Open 4.99 Open BusDuct10 BusDuct11 BusDuct12 BusDuct14 BusDuct15 7.8 7.8 7.8 4.99

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page 1 11:40:44 Apr 05, 2016 Project File: SK Mines HZL

PMCC- 2 MAIN PROCESS -ECR

PMCC-3 SER/TER HOUSE PMCC- 1 MAIN PROCESS-EPR 0.433 kV 8 4 .7 0.433 kV 0. 04 k V 4 2 0.433 kV 0. 0 7 k V 4 1. 2 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0. 0 7 k V 4 1. 2 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0. 0 7 k V 4 1. 2 TR#2 2 MVA BusDuct8 TR#3 2 MVA BusDuct14 7.8 Lump4 1. 5 MVA 7.8 Open Lump3 0. 5 MVA Lump2 0. 5 MVA Open Lump1 1. 5 MVA 7.8 7.8 BusDuct7 TR#1 2 MVA TR#5 2 MVA BusDuct11 TR#6 2 MVA BusDuct10 Lump8 1. 5 MVA Open Lump7 0. 5 MVA Lump6 0. 5 MVA Open Lump5 1. 5 MVA 7.8 7.8 BusDuct9 TR#4 2 MVA Open Lump9 900 kVA 4.99 4.99 BusDuct12 TR#7 2 MVA fl oat air blower -1

750 kW ball mil l

2850 kW regrind mil l 375 kW

Float air blower-2 750 kW Secondary c one crusher

200 kW TR#8 2 MVA BusDuct15 Lump10 900 kVA Lump1 1. 5 MVA Lump2 0. 5 MVA Lump3 0. 5 MVA Lump4 1. 5 MVA Lump5 1. 5 MVA Lump6 0. 5 MVA Lump7 0. 5 MVA Lump8

1. 5 MVA 900 kVALump9

Lump10 900 kVA TR#1 2 MVA TR#2 2 MVA TR#3 2 MVA TR#4 2 MVA TR#5 2 MVA TR#6 2 MVA TR#7 2MVA TR#8 2 MVA 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV 0.433 kV fl oat air blower -1

750 kW ball mil l

2850 kW regrind mil l

375kW Secondar yconecr usher

200 kW 750 kWFloat air blower-2

0. 04 k V 4 2 0. 0 7 k V 4 1. 2 0. 0 7 k V 4 1. 2 0. 0 7 k V 4 1. 2 8 4 .7 BusDuct7 BusDuct8 7.8 Open Open 7.8 BusDuct9 7.8 Open Open 4.99 Open BusDuct10 BusDuct11 BusDuct12 BusDuct14 BusDuct15 7.8 7.8 7.8 4.99 Location: SK Mines

Engineer: Jigyesh Sharma

Study Case: CASE-1 11.1.1C

Page: 1

SN: LARTOUMUM

Filename: SK Mines HZL

Project: SC calculation

ETAP

Contract:

Date: 04-05-2016

Revision: Base Config.: Normal

Electrical Transient Analyzer Program

Short-Circuit Analysis

IEC 60909 Standard

(5)

Electrical Transient Analyzer Program

Short-Circuit Analysis

IEC 60909 Standard

3-Phase, LG, LL, & LLG Fault Currents

Number of Buses: Number of Branches: Number of Machines: Total 15 Tie PD Total 17 5 Impedance Lumped Load 10 0 Total Induction Machines 5 Line/Cable 0 17 Load Synchronous Motor 0 Reactor 0 15 V-Control 2 Power Grid XFMR3 0 0 Swing Synchronous Generator 0 XFMR2 10 2 Unit System: Project Filename: Output Filename: System Frequency: 50.00 Hz English SK Mines HZL

(6)

Adjustments

Transformer Impedance:

Reactor Impedance:

Tolerance

Overload Heater Resistance:

Transmission Line Length:

Cable Length:

Temperature Correction

Transmission Line Resistance:

Cable Resistance: Percent Degree C 20 20 Individual /Global Individual /Global Global Global Individual Individual Apply Adjustments Apply Adjustments Yes Yes No No No Yes Yes

(7)

Bus Input Data

ID Type

Bus InitialVoltage

%Mag. Ang. Sub-sys Base kV Nom. kV 33.000 33.000 SWNG Bus20 1 100.00 0.00 6.600 6.600 Load Bus22 1 100.00 -30.00 33.000 33.000 SWNG Bus24 2 100.00 0.00 6.600 6.600 Load Bus25 1 100.00 -30.00 0.433 0.433 Load Bus26 1 100.00 0.00 0.433 0.433 Load Bus27 1 100.00 0.00 0.433 0.433 Load Bus28 1 100.00 0.00 0.433 0.433 Load Bus29 1 100.00 0.00 0.433 0.433 Load Bus30 1 100.00 0.00 0.433 0.433 Load Bus31 1 100.00 0.00 0.433 0.433 Load Bus32 1 100.00 0.00 0.433 0.433 Load Bus33 1 100.00 0.00 0.433 0.433 Load Bus34 1 100.00 0.00 0.433 0.433 Load Bus35 1 100.00 0.00 0.433 0.433 Load Bus36 1 100.00 0.00 0.433 0.433 Load Bus37 1 100.00 0.00 6.600 6.600 Load T14~ 0 100.00 0.00 17 Buses Total All voltages reported by ETAP are in % of bus Nominal kV. Base kV values of buses are calculated and used internally by ETAP.

(8)

2-Winding Transformer Input Data

Phase Shift

ID MVA Prim.kV Sec.kV %Z X/R Prim. Sec.

Transformer %TapSetting

% Tol. Rating ZVariation +5% -5% % Z Type Angle Adjusted T10 20.000 33.000 6.600 10.00 20.00 0 0 0 0 0 10.0000 Dyn 30.000 TR#1 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#2 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#3 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#4 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#5 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#6 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#7 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#8 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 T14 20.000 33.000 6.600 10.00 20.00 0 0 0 0 0 10.0000 Dyn -30.000

2-Winding Transformer Grounding Input Data

ID MVA Prim. kV Sec. kV

Transformer Type Rating Primary Grounding Conn. Type Secondary Amp Ohm kV kV Amp Ohm Type T10 20.000 33.000 6.600 D/Y Solid D/Y 0.433 6.600 2.000 TR#1 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#2 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#3 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#4 Resistor 75.00000 D/Y 0.433 6.600 2.000 TR#5 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#6 Resistor 75.00000 D/Y 0.433 6.600 2.000 TR#7 Resistor 75.00000 D/Y 0.433 6.600 2.000 TR#8 Resistor 3.3 75.00000 D/Y 6.600 33.000 20.000 T14 Solid

(9)

Branch Connections

ID Type FromBus ToBus R X Z

CKT/Branch Connected Bus ID %Impedance,Pos.Seq.,100MVAb

Y T10 2W XFMR Bus20 Bus22 2.46 49.23 49.30 TR#1 2W XFMR Bus22 Bus26 49.42 296.51 300.60 TR#2 2W XFMR Bus25 Bus30 49.42 296.51 300.60 TR#3 2W XFMR Bus22 Bus28 49.42 296.51 300.60 TR#4 2W XFMR Bus22 Bus31 49.42 296.51 300.60 TR#5 2W XFMR Bus25 Bus32 49.42 296.51 300.60 TR#6 2W XFMR Bus25 Bus34 49.42 296.51 300.60 TR#7 2W XFMR Bus22 Bus36 49.42 296.51 300.60 TR#8 2W XFMR Bus25 Bus37 49.42 296.51 300.60 T14 2W XFMR T14~ Bus25 61.54 1230.86 1232.40

CB66 Tie Breakr Bus30 Bus27

(10)

Power Grid Input Data

kV R X" Rating R/X" 100 MVA Base % Impedance MVASC ID ID

PowerGrid ConnectedBus Grounding

Type 0.07

U3 Bus20 1000.000 33.000 0.71247 9.97459 Wye - Solid

0.07

U4 Bus24 1000.000 33.000 0.71247 9.97459 Wye - Solid

(11)

Induction Machine Input Data

ID

ID Type kVA kV Amp PF %R %X"

InductionMachine Rating

Qty Connected Bus R/X" MW/PP mFact. HP/kW Grounding

Conn. Type Amp

PosSeqImp (Mtr Base)

75.90

Bus22 6.600 92.37 2.16 13.72 0.16 0.38

loatairblower-1 Motor 1 750.00 867.66 Wye Open

284.61

Bus22 6.600 92.92 1.49 13.81 0.11 1.43

allmill Motor 1 2850.00 3253.59 Wye Open

38.21

Bus22 6.600 92.09 2.62 13.64 0.19 0.19

egrindmill Motor 1 375.00 436.83 Wye Open

75.90

Bus25 6.600 92.37 2.16 13.72 0.16 0.38

Floatairblower-2 Motor 1 750.00 867.66 Wye Open

20.51

Bus25 6.600 91.83 3.12 13.53 0.23 0.10

Secondaryconecrusher Motor 1 200.00 234.44 Wye Open

Total Connected Induction Machines ( = 5 ): 5660.2 kVA

Lumped Load Input Data

ID kVA kV R X" R/X"

Lumped Load Rating MachineBase

kW kvar Loading MTR STAT % Load Lumped Load Motor Loads Amp % PF % Impedance MW/PP mFact.

Conn. Type Amp

Grounding Lump1 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump2 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump3 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump4 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump5 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump6 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump7 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump8 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump9 900.0 0.433 1200.04 85.00 70 30 535.50 331.87 6.46 15.37 0.42 Delta 0.54 Lump10 900.0 0.433 1200.04 85.00 70 30 535.50 331.87 6.46 15.37 0.42 Delta 0.54

(12)

SHORT- CIRCUIT REPORT

Fault at bus:

Looking into "From Bus"

ID From Bus Symm.rms

ID Va

From Bus To Bus % V kA % Voltage at From Bus

Contribution 3-Phase Fault

Vb Vc Ia 3I0 R1 X1 R0 X0

kA Symm. rms % Impedance on 100 MVA base

Line-To-Ground Fault

Positive & Zero Sequence Impedances Nominal kV Voltage c Factor Bus22 = 1.10 (Maximum If) = 6.600

Bus22 Total 0.00 23.162 0.00 104.37 100.85 21.986 21.986 4.67E+000 4.13E+001 2.37E+000 4.73E+001

Bus20 Bus22 81.76 15.959 91.64 100.12 91.22 17.245 21.140* 3.25E+000 6.02E+001 2.46E+000 4.92E+001

Bus26 Bus22 15.98 0.512 66.38 100.56 62.11 0.327 0.000 6.64E+002 1.76E+003

Bus28 Bus22 15.98 0.512 66.38 100.56 62.11 0.327 0.000 6.64E+002 1.76E+003

Bus31 Bus22 15.98 0.512 66.38 100.56 62.11 0.327 0.000 6.64E+002 1.76E+003

Bus36 Bus22 10.23 0.327 64.16 100.60 60.53 0.209 0.000 1.07E+003 2.74E+003

float air blower -1 Bus22 100.00 0.601 100.00 100.00 100.00 0.364 0.000 2.49E+002 1.58E+003

ball mill Bus22 100.00 2.254 100.00 100.00 100.00 1.367 0.000 4.59E+001 4.24E+002

regrind mill Bus22 100.00 0.303 100.00 100.00 100.00 0.169 0.000 6.00E+002 3.12E+003

Bus30 Bus25 11.24 0.360 64.55 100.59 60.79 0.230 0.000 9.72E+002 2.49E+003

Bus32 Bus25 11.24 0.360 64.55 100.59 60.79 0.230 0.000 9.72E+002 2.49E+003

Bus34 Bus25 15.98 0.512 66.38 100.56 62.11 0.327 0.000 6.64E+002 1.76E+003

Bus37 Bus25 10.23 0.327 64.16 100.60 60.53 0.209 0.000 1.07E+003 2.74E+003

T14~ Bus25 0.00 0.000 58.23 60.26 100.66 0.282 0.846* 6.15E+001 1.23E+003

Float air blower-2 Bus25 100.00 0.601 100.00 100.00 100.00 0.364 0.000 2.49E+002 1.58E+003

Secondary cone crusher

Bus25 100.00 0.162 100.00 100.00 100.00 0.090 0.000 1.33E+003 5.77E+003

Bus25 Bus22 0.00 2.312 0.00 104.37 100.85 1.721 0.846

Bus27 Bus30 11.24 2.742 64.55 100.59 60.79 1.520 0.000

Bus29 Bus30 11.24 2.742 64.55 100.59 60.79 1.520 0.000

Bus33 Bus32 11.24 2.742 64.55 100.59 60.79 1.520 0.000

(13)

Fault at bus:

ID Va

Initial Symmetrical Current (kA, rms)

# Indicates a fault current contribution from a three-winding transformer

* Indicates a zero sequence fault current contribution (3I0) from a grounded Delta- Y transformer :

3-Phase L-G L-L L-L-G

23.162 Peak Current (kA), Method C

Breaking Current (kA, rms, symm) Steady State Current (kA, rms)

: : : 57.414 15.959 21.986 54.500 21.986 21.986 19.852 49.209 19.852 19.852 22.975 56.952 22.975 22.975

(14)

Short-Circuit Summary Report

3-Phase, LG, LL, LLG Fault Currents

ID kV

Bus

I"k ip Ik I"k ip Ib I"k ip Ib Ik I"k Ib

3-Phase Fault Line-to-Ground Fault Line-to-Line Fault *Line-to-Line-to-Ground

Ik ip Ik

Bus22 6.600 23.162 57.414 15.959 21.986 54.500 21.986 21.986 19.852 49.209 19.852 19.852 22.975 56.952 22.975 22.975

All fault currents are in rms kA. Current ip is calculated using Method C. * LLG fault current is the larger of the two faulted line currents.

(15)

Sequence Impedance Summary Report

ID kV

Bus

Resistance Reactance Impedance

P os it iv e S eq. I mp . (o hm) Ne ga ti ve S eq . I mp . (o hm)

Zero Seq. Imp. (ohm)

Fault Zf (ohm)

(16)

Electrical Transient Analyzer Program

Short-Circuit Analysis

IEC 60909 Standard

3-Phase, LG, LL, & LLG Fault Currents

Number of Buses: Number of Branches: Number of Machines: Total 14 Tie PD Total 17 4 Impedance Lumped Load 10 0 Total Induction Machines 5 Line/Cable 0 16 Load Synchronous Motor 0 Reactor 0 14 V-Control 2 Power Grid XFMR3 0 0 Swing Synchronous Generator 0 XFMR2 10 2 Unit System: Project Filename: Output Filename: System Frequency: 50.00 Hz English SK Mines HZL

(17)

Adjustments

Transformer Impedance:

Reactor Impedance:

Tolerance

Overload Heater Resistance:

Transmission Line Length:

Cable Length:

Temperature Correction

Transmission Line Resistance:

Cable Resistance: Percent Degree C 20 20 Individual /Global Individual /Global Global Global Individual Individual Apply Adjustments Apply Adjustments Yes Yes No No No Yes Yes

(18)

Bus Input Data

ID Type

Bus InitialVoltage

%Mag. Ang. Sub-sys Base kV Nom. kV 33.000 33.000 SWNG Bus20 1 100.00 0.00 6.600 6.600 Load Bus22 1 100.00 -30.00 33.000 33.000 SWNG Bus24 2 100.00 0.00 6.600 6.600 Load Bus25 2 100.00 30.00 0.433 0.433 Load Bus26 1 100.00 0.00 0.433 0.433 Load Bus27 2 100.00 60.00 0.433 0.433 Load Bus28 1 100.00 0.00 0.433 0.433 Load Bus29 2 100.00 60.00 0.433 0.433 Load Bus30 2 100.00 60.00 0.433 0.433 Load Bus31 1 100.00 0.00 0.433 0.433 Load Bus32 2 100.00 60.00 0.433 0.433 Load Bus33 2 100.00 60.00 0.433 0.433 Load Bus34 2 100.00 60.00 0.433 0.433 Load Bus35 2 100.00 60.00 0.433 0.433 Load Bus36 1 100.00 0.00 0.433 0.433 Load Bus37 2 100.00 60.00 16 Buses Total All voltages reported by ETAP are in % of bus Nominal kV. Base kV values of buses are calculated and used internally by ETAP.

(19)

2-Winding Transformer Input Data

Phase Shift

ID MVA Prim.kV Sec.kV %Z X/R Prim. Sec.

Transformer %TapSetting

% Tol. Rating ZVariation +5% -5% % Z Type Angle Adjusted T10 20.000 33.000 6.600 10.00 20.00 0 0 0 0 0 10.0000 Dyn 30.000 T14 20.000 33.000 6.600 10.00 20.00 0 0 0 0 0 10.0000 Dyn -30.000 TR#1 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#2 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#3 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#4 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#5 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#6 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#7 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000 TR#8 2.000 6.600 0.433 6.25 6.00 0 0 0 0 0 6.2500 Dyn -30.000

2-Winding Transformer Grounding Input Data

ID MVA Prim. kV Sec. kV

Transformer Type Rating Primary Grounding Conn. Type Secondary Amp Ohm kV kV Amp Ohm Type T10 20.000 33.000 6.600 D/Y Solid D/Y 6.600 33.000 20.000 T14 Solid D/Y 0.433 6.600 2.000 TR#1 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#2 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#3 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#4 Resistor 75.00000 D/Y 0.433 6.600 2.000 TR#5 Resistor 3.3 75.00000 D/Y 0.433 6.600 2.000 TR#6 Resistor 75.00000 D/Y 0.433 6.600 2.000 TR#7 Resistor 75.00000 D/Y 0.433 6.600 2.000 TR#8 Resistor 3.3 75.00000

(20)

Branch Connections

ID Type FromBus ToBus R X Z

CKT/Branch Connected Bus ID %Impedance,Pos.Seq.,100MVAb

Y T10 2W XFMR Bus20 Bus22 2.46 49.23 49.30 T14 2W XFMR Bus24 Bus25 2.46 49.23 49.30 TR#1 2W XFMR Bus22 Bus26 49.42 296.51 300.60 TR#2 2W XFMR Bus25 Bus30 49.42 296.51 300.60 TR#3 2W XFMR Bus22 Bus28 49.42 296.51 300.60 TR#4 2W XFMR Bus22 Bus31 49.42 296.51 300.60 TR#5 2W XFMR Bus25 Bus32 49.42 296.51 300.60 TR#6 2W XFMR Bus25 Bus34 49.42 296.51 300.60 TR#7 2W XFMR Bus22 Bus36 49.42 296.51 300.60 TR#8 2W XFMR Bus25 Bus37 49.42 296.51 300.60

(21)

Power Grid Input Data

kV R X" Rating R/X" 100 MVA Base % Impedance MVASC ID ID

PowerGrid ConnectedBus Grounding

Type 0.07

U3 Bus20 1000.000 33.000 0.71247 9.97459 Wye - Solid

0.07

U4 Bus24 1000.000 33.000 0.71247 9.97459 Wye - Solid

(22)

Induction Machine Input Data

ID

ID Type kVA kV Amp PF %R %X"

InductionMachine Rating

Qty Connected Bus R/X" MW/PP mFact. HP/kW Grounding

Conn. Type Amp

PosSeqImp (Mtr Base)

75.90

Bus22 6.600 92.37 2.16 13.72 0.16 0.38

loatairblower-1 Motor 1 750.00 867.66 Wye Open

284.61

Bus22 6.600 92.92 1.49 13.81 0.11 1.43

allmill Motor 1 2850.00 3253.59 Wye Open

38.21

Bus22 6.600 92.09 2.62 13.64 0.19 0.19

egrindmill Motor 1 375.00 436.83 Wye Open

75.90

Bus25 6.600 92.37 2.16 13.72 0.16 0.38

Floatairblower-2 Motor 1 750.00 867.66 Wye Open

20.51

Bus25 6.600 91.83 3.12 13.53 0.23 0.10

Secondaryconecrusher Motor 1 200.00 234.44 Wye Open

Total Connected Induction Machines ( = 5 ): 5660.2 kVA

Lumped Load Input Data

ID kVA kV R X" R/X"

Lumped Load Rating MachineBase

kW kvar Loading MTR STAT % Load Lumped Load Motor Loads Amp % PF % Impedance MW/PP mFact.

Conn. Type Amp

Grounding Lump1 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump2 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump3 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump4 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump5 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump6 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump7 500.0 0.433 666.69 85.00 70 30 297.50 184.37 6.46 15.37 0.42 Delta 0.30 Lump8 1500.0 0.433 2000.06 85.00 70 30 892.50 553.12 6.46 15.37 0.42 Delta 0.89 Lump9 900.0 0.433 1200.04 85.00 70 30 535.50 331.87 6.46 15.37 0.42 Delta 0.54 Lump10 900.0 0.433 1200.04 85.00 70 30 535.50 331.87 6.46 15.37 0.42 Delta 0.54

(23)

SHORT- CIRCUIT REPORT

Fault at bus:

ID Va

Bus22 Total 0.00 20.897 0.00 102.58 100.30 20.302 20.302 4.22E+000 4.59E+001 2.46E+000 4.92E+001

Bus20 Bus22 81.76 15.959 91.41 100.11 91.07 17.194 20.302* 3.25E+000 6.02E+001 2.46E+000 4.92E+001

Bus26 Bus22 15.98 0.512 65.47 100.49 61.67 0.334 0.000 6.64E+002 1.76E+003

Bus28 Bus22 15.98 0.512 65.47 100.49 61.67 0.334 0.000 6.64E+002 1.76E+003

Bus31 Bus22 15.98 0.512 65.47 100.49 61.67 0.334 0.000 6.64E+002 1.76E+003

Bus36 Bus22 10.23 0.327 63.20 100.52 60.12 0.214 0.000 1.07E+003 2.74E+003

float air blower -1 Bus22 100.00 0.601 100.00 100.00 100.00 0.372 0.000 2.49E+002 1.58E+003

ball mill Bus22 100.00 2.254 100.00 100.00 100.00 1.398 0.000 4.59E+001 4.24E+002

regrind mill Bus22 100.00 0.303 100.00 100.00 100.00 0.172 0.000 6.00E+002 3.12E+003

Initial Symmetrical Current (kA, rms)

# Indicates a fault current contribution from a three-winding transformer

* Indicates a zero sequence fault current contribution (3I0) from a grounded Delta- Y transformer :

3-Phase L-G L-L L-L-G

20.897 Peak Current (kA), Method C

Breaking Current (kA, rms, symm) Steady State Current (kA, rms)

: : : 52.917 15.959 20.302 51.412 20.302 20.302 17.937 45.421 17.937 17.937 20.831 52.751 20.831 20.831

(24)

Short-Circuit Summary Report

3-Phase, LG, LL, LLG Fault Currents

ID kV

Bus

I"k ip Ik I"k ip Ib I"k ip Ib Ik I"k Ib

3-Phase Fault Line-to-Ground Fault Line-to-Line Fault *Line-to-Line-to-Ground

Ik ip Ik

Bus22 6.600 20.897 52.917 15.959 20.302 51.412 20.302 20.302 17.937 45.421 17.937 17.937 20.831 52.751 20.831 20.831

All fault currents are in rms kA. Current ip is calculated using Method C. * LLG fault current is the larger of the two faulted line currents.

(25)

Sequence Impedance Summary Report

ID kV

Bus

P os it iv e S eq. I mp . (o hm) Ne ga ti ve S eq . I mp . (o hm)

Zero Seq. Imp. (ohm)

Fault Zf (ohm)