SECTION: TITLE SHEET i OF i
BHAVANAGAR ENERGY COMPANY LIMITED, BHAVANAGAR
2 X 250 MW TPP
INITIALS SIGN INITIALS SIGN INITIALS SIGN INITIALS
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PPD. BY
KYP
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-SD/-CKD. BY
GBK
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-SD/-APP. BY
SVSP
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-SD/-DATE
REV. NO
FILE NAME.: M2-2160.XLS
ISSUE
22.07.2010
TCE-M2-EL-CA-D-2160TCE CONSULTING ENGINEERS LIMITED
CABLE SIZING CALCULATIONS
R3
CABLE SIZING CALCULATIONS
R1
R0
R2
By KYP Project 2 X 250 MW TPP
Date 22.07.2010 Doc No.
Chkd.GBK Client BECL, BHAVANAGAR Subject CABLE SIZING Date Job No. 5403A Office DB Dept. EL Sh. No. 1 of 2 Rev. No. 0
CABLE SIZING CALCULATION (6.6 kV H.V SIDE)
1 FEEDER DATA REMARKS
1.1 Incoming
1.2 Rating, 3 PH kVA
1.3 Voltage kV 6.600
1.4 Power Factor (p.f) 0.8
1.5 Efficiency (Effy) 0.9
1.6 Type of Earthing Earthed /
Unearthed Solidly Earthed. 1.7 (a) Current IFL kVA (Amp.)
3 * kV
(b) Current IFL kW (Motor) (Amp.) 3 * kV * Effy. * p.f
1.8
1.9 (a) 3 Phase - Fault Current (Ish) kA (b) Fault Clearing Time (t) ( Secs) 1.10 Estimated Length (L) m 1.11 Permissible Voltage drop (a) Running % (b) Starting %
2 LAYING CONDITIONS Tray/ Buried Duct Trench/ in
Air ground
2.1 Ambient Temperature Deg. C 45 0.86 2.2 Grouping / Spacing with other cables 1 2.3 Thermal Resistivity Deg.C cm /W 200 1.00 2.4 Depth of Burial mm 750 1.00 2.5 Overall Derating Factor ODF 0.860
3 TYPE OF CABLE TO BE USED
(To be Marked) Cu (Cond.)
3.1 PVC 75 112 3.2 XLPE (a) 22 / 33 kV 94 140 (b) 11 kV 94 140 (c) 6.6 kV 94 140 3.3 (d) 415V 94 140 4 CABLE SIZING
4.1 Based on Full Load Current
(a) Cable rating required (I / ODF) Amp.
(b) Cable for above rating Type No.of runs XLPE 1 CORE 2 4.2
(a) Sq. mm
TATA CONSULTING ENGINEERS LIMITED
Incoming / Outgoing & Designation
12000
1049.73
Type of Protection (CB / Fuse / MCB / MCCB) CB 40 0.5
Refer TCE design guide
500 5 15
Derating Refer cable Factor catalogue. Value of k (Amp./ sq.mm) Al (Cond.) 1220.61 Size (Sq.mm.) 800 Based on Short Circuit Current
(For breaker protected feeders only)
300.897 cond. of Area k t * Ish =
(b) Sq. mm 4.3 Estimated Cable Size
( Higher of 4.1 & 4.2 ) 5 CHECK FOR VOLTAGE DROP
5.1 Cable Size Sq. mm 5.2 R (at cond. temp) ohm/ph./kM
X ohm/ph./kM Load Angle 5.3
5.4
(Refer Note - 1 below) 5.5
YES
5.6 Sq. mm
800 6.0 RECOMMENDED CABLE SIZE Type
(Higher of 4.3 and 5.6)
XLPE 1 CORE
NOTE:
1) Load angle shall correspond to starting condition of Motor. For Contactor Controlled Feeder
(HT only) I2t of cable chosen shall
be 1.5*I2t of associated fuse -Sq. mm 400 800 0.047 0.091 36.86 % Drop 0.635 % Drop 4.572 Is the voltage drop within
permissible limits? (If not select higher size of cable and check for voltage drop)
Yes / No Cable Size considering Voltage
Drop
Size (Sq.mm) No. of Runs
800 2
10000
*
kV
L
*
)
Sin
X
+
Cos
R
(
I
*
3
FL
10000 * kV L * ) Sin X + Cos R ( I * 3 STG By KYP Project 2 X 250 MW TPP
Date 22.07.2010 Doc No.
Chkd.GBK Client BECL, BHAVANAGAR Subject CABLE SIZING Date Job No. 5403A Office DB Dept. EL Sh. No. 1 of 2 Rev. No. 0
CABLE SIZING CALCULATION (6.6 kV H.V SIDE)
1 FEEDER DATA REMARKS
1.1 Incoming
1.2 Rating, 3 PH kVA
1.3 Voltage kV 6.600
1.4 Power Factor (p.f) 0.8
1.5 Efficiency (Effy) 0.9
1.6 Type of Earthing Earthed /
Unearthed Solidly Earthed. 1.7 (a) Current IFL kVA (Amp.)
3 * kV
(b) Current IFL kW (Motor) (Amp.) 3 * kV * Effy. * p.f
1.8
1.9 (a) 3 Phase - Fault Current (Ish) kA (b) Fault Clearing Time (t) ( Secs) 1.10 Estimated Length (L) m 1.11 Permissible Voltage drop (a) Running % (b) Starting %
2 LAYING CONDITIONS Tray/ Buried Duct Trench/ in
Air ground
2.1 Ambient Temperature Deg. C 45 0.86 2.2 Grouping / Spacing with other cables 1 2.3 Thermal Resistivity Deg.C cm /W 200 1.00 2.4 Depth of Burial mm 750 1.00 2.5 Overall Derating Factor ODF 0.860
3 TYPE OF CABLE TO BE USED
(To be Marked) Cu (Cond.)
3.1 PVC 75 112 3.2 XLPE (a) 22 / 33 kV 94 140 (b) 11 kV 94 140 (c) 6.6 kV 94 140 3.3 (d) 415V 94 140 4 CABLE SIZING
4.1 Based on Full Load Current
(a) Cable rating required (I / ODF) Amp.
(b) Cable for above rating Type No.of runs XLPE 3 CORE 1 4.2
(a) Sq. mm
TATA CONSULTING ENGINEERS LIMITED
Incoming / Outgoing & Designation
2500
218.69
Type of Protection (CB / Fuse / MCB / MCCB) CB 40 0.16
Refer TCE design guide
50 5 15
Derating Refer cable Factor catalogue. Value of k (Amp./ sq.mm) Al (Cond.) 254.29 Size (Sq.mm.) 185 Based on Short Circuit Current
(For breaker protected feeders only)
170.213 cond. of Area k t * Ish =
(b) Sq. mm 4.3 Estimated Cable Size
( Higher of 4.1 & 4.2 ) 5 CHECK FOR VOLTAGE DROP
5.1 Cable Size Sq. mm 5.2 R (at cond. temp) ohm/ph./kM
X ohm/ph./kM Load Angle 5.3
5.4
(Refer Note - 1 below) 5.5
YES
5.6 Sq. mm
185 6.0 RECOMMENDED CABLE SIZE Type
(Higher of 4.3 and 5.6)
XLPE 3 CORE
NOTE:
1) Load angle shall correspond to starting condition of Motor. For Contactor Controlled Feeder
(HT only) I2t of cable chosen shall
be 1.5*I2t of associated fuse -Sq. mm 185 185 0.21 0.0969 36.86 % Drop 0.065 % Drop -Is the voltage drop within
permissible limits? (If not select higher size of cable and check for voltage drop)
Yes / No Cable Size considering Voltage
Drop
Size (Sq.mm) No. of Runs
185 1
10000
*
kV
L
*
)
Sin
X
+
Cos
R
(
I
*
3
FL
10000 * kV L * ) Sin X + Cos R ( I * 3 STG By KYP Project 2 X 250 MW TPP
Date 22.07.2010 Doc No.
Chkd.GBK Client BECL, BHAVANAGAR Subject CABLE SIZING Date Job No. 5403A Office DB Dept. EL Sh. No. 1 of 2 Rev. No. 0
CABLE SIZING CALCULATION (6.6 kV H.V SIDE)
1 FEEDER DATA REMARKS
1.1 Incoming
1.2 Rating, 3 PH kW
1.3 Voltage kV 6.600
1.4 Power Factor (p.f) 0.85
1.5 Efficiency (Effy) 0.95
1.6 Type of Earthing Earthed /
Unearthed Solidly Earthed. 1.7 (a) Current IFL kVA (Amp.)
3 * kV
(b) Current IFL kW (Motor) (Amp.) 3 * kV * Effy. * p.f
1.8
1.9 (a) 3 Phase - Fault Current (Ish) kA (b) Fault Clearing Time (t) ( Secs) 1.10 Estimated Length (L) m 1.11 Permissible Voltage drop (a) Running % (b) Starting %
2 LAYING CONDITIONS Tray/ Buried Duct Trench/ in
Air ground
2.1 Ambient Temperature Deg. C 45 0.86 2.2 Grouping / Spacing with other cables 1 2.3 Thermal Resistivity Deg.C cm /W 200 1.00 2.4 Depth of Burial mm 750 1.00 2.5 Overall Derating Factor ODF 0.860
3 TYPE OF CABLE TO BE USED
(To be Marked) Cu (Cond.)
3.1 PVC 75 112 3.2 XLPE (a) 22 / 33 kV 94 140 (b) 11 kV 94 140 (c) 6.6 kV 94 140 3.3 (d) 415V 94 140 4 CABLE SIZING
4.1 Based on Full Load Current
(a) Cable rating required (I / ODF) Amp.
(b) Cable for above rating Type No.of runs XLPE 3 CORE 1 4.2
(a) Sq. mm
TATA CONSULTING ENGINEERS LIMITED
Incoming / Outgoing & Designation
1500
162.50 Type of Protection (CB / Fuse / MCB / MCCB) CB
40 0.16
Refer TCE design guide
50 5 15
Derating Refer cable Factor catalogue. Value of k (Amp./ sq.mm) Al (Cond.) 188.95 Size (Sq.mm.) 95 Based on Short Circuit Current
(For breaker protected feeders only)
170.213 cond. of Area k t * Ish =
(b) Sq. mm 4.3 Estimated Cable Size
( Higher of 4.1 & 4.2 ) 5 CHECK FOR VOLTAGE DROP
5.1 Cable Size Sq. mm 5.2 R (at cond. temp) ohm/ph./kM
X ohm/ph./kM Load Angle 5.3
5.4
(Refer Note - 1 below) 5.5
YES
5.6 Sq. mm
185 6.0 RECOMMENDED CABLE SIZE Type
(Higher of 4.3 and 5.6)
XLPE 3 CORE
NOTE:
1) Load angle shall correspond to starting condition of Motor. For Contactor Controlled Feeder
(HT only) I2t of cable chosen shall
be 1.5*I2t of associated fuse -Sq. mm 185 185 0.21 0.089 36.86 % Drop 0.047 % Drop 0.340 Is the voltage drop within
permissible limits? (If not select higher size of cable and check for voltage drop)
Yes / No Cable Size considering Voltage
Drop
Size (Sq.mm) No. of Runs
185 3
10000
*
kV
L
*
)
Sin
X
+
Cos
R
(
I
*
3
FL
10000 * kV L * ) Sin X + Cos R ( I * 3 STG By KYP Project 2 X 250 MW TPP
Date 22.07.2010 Doc No.
Chkd.GBK Client BECL, BHAVANAGAR Subject CABLE SIZING Date Job No. 5403A Office DB Dept. EL Sh. No. 1 of 2 Rev. No. 0
CABLE SIZING CALCULATION (6.6 kV H.V SIDE)
1 FEEDER DATA REMARKS
1.1 Incoming
1.2 Rating, 3 PH kW
1.3 Voltage kV 6.600
1.4 Power Factor (p.f) 0.85
1.5 Efficiency (Effy) 0.95
1.6 Type of Earthing Earthed /
Unearthed Solidly Earthed. 1.7 (a) Current IFL kVA (Amp.)
3 * kV
(b) Current IFL kW (Motor) (Amp.) 3 * kV * Effy. * p.f
1.8
1.9 (a) 3 Phase - Fault Current (Ish) kA (b) Fault Clearing Time (t) ( Secs) 1.10 Estimated Length (L) m 1.11 Permissible Voltage drop (a) Running % (b) Starting %
2 LAYING CONDITIONS Tray/ Buried Duct Trench/ in
Air ground
2.1 Ambient Temperature Deg. C 45 0.86 2.2 Grouping / Spacing with other cables 1 2.3 Thermal Resistivity Deg.C cm /W 200 1.00 2.4 Depth of Burial mm 750 1.00 2.5 Overall Derating Factor ODF 0.860
3 TYPE OF CABLE TO BE USED
(To be Marked) Cu (Cond.)
3.1 PVC 75 112 3.2 XLPE (a) 22 / 33 kV 94 140 (b) 11 kV 94 140 (c) 6.6 kV 94 140 3.3 (d) 415V 94 140 4 CABLE SIZING
4.1 Based on Full Load Current
(a) Cable rating required (I / ODF) Amp.
(b) Cable for above rating Type No.of runs XLPE 3 CORE 1 4.2
(a) Sq. mm
TATA CONSULTING ENGINEERS LIMITED
Incoming / Outgoing & Designation
350
37.92 Type of Protection (CB / Fuse / MCB / MCCB) CB
40 0.16
Refer TCE design guide
100 5 15
Derating Refer cable Factor catalogue. Value of k (Amp./ sq.mm) Al (Cond.) 44.09 Size (Sq.mm.) 35 Based on Short Circuit Current
(For breaker protected feeders only)
170.213 cond. of Area k t * Ish =
(b) Sq. mm 4.3 Estimated Cable Size
( Higher of 4.1 & 4.2 ) 5 CHECK FOR VOLTAGE DROP
5.1 Cable Size Sq. mm 5.2 R (at cond. temp) ohm/ph./kM
X ohm/ph./kM Load Angle 5.3
5.4
(Refer Note - 1 below) 5.5
YES
5.6 Sq. mm
240 6.0 RECOMMENDED CABLE SIZE Type
(Higher of 4.3 and 5.6)
XLPE 3 CORE
NOTE:
1) Load angle shall correspond to starting condition of Motor. For Contactor Controlled Feeder
(HT only) I2t of cable chosen shall
be 1.5*I2t of associated fuse -Sq. mm 185 185 0.21 0.089 36.86 % Drop 0.022 % Drop 0.159 Is the voltage drop within
permissible limits? (If not select higher size of cable and check for voltage drop)
Yes / No Cable Size considering Voltage
Drop
Size (Sq.mm) No. of Runs
185 1
