220vst_1

225 MW COMBINED CYCLE GAS BASED POWER PLANT AT KASHIPUR - UTTRAKHAND

Owner:

GIPL

GAMA INFRAPROP (P) LIMITED. M-3, First Floor, Hauz Khas, Aurbindo Marg,

New Delhi - 110016

Owners Engineer:

CONSULTING ENGINEERS LIMITED

MUMBAI

EPC Contractor:

LIPL LUNA INFRAPROP (P) LIMITED.

M-3, First Floor, Hauz Khas, Aurbindo Marg, New Delhi 110016

Consultant To EPC Contractor:

TPSC(I) PRIVATE LIMITED (Wholly owned subsidiary of Toshiba Plant Systems & Services Corporation, Tokyo, Japan) A-1 Module, D - Quadrant, 2nd Floor, Cyber Towers, Hi-Tec City, Madhapur, Hyderabad - 500 081, INDIA

Document Title:

220V STATION BATTERY & CHARGER

SIZING CALCULATION

LIPL Document No.

LIKP-E-GLI1-721-14-0001, Rev. 00

Consultant Doc. No.

E-GLI1-721-14-0001, Rev. 00

220V STATION BATTERY & CHARGER SIZING CALCULATION LIPL

Project

225 MW COMBINED CYCLE GAS BASED POWER PLANT

AT KASHIPUR, UTTRAKHAND Doc. No: E-GLI1-721-14-001

Rev 00

Date: 24.02.2011 Page 1 of 1

DOCUMENT CONTROL SHEET

00 24-02-11 For Approval RK SB DN DN REV NO DATE STATUS

INTLS SGN INTLS SGN INTLS SGN INTLS SGN

PREPARED BY CHECKED BY APPROVED BY ISSUE AUTHORISATION

Project 225 MW COMBINED CYCLE GAS BASED POWER PLANT AT KASHIPUR, UTTRAKHAND Design .by RK Date 24.02.11

Doc. Title 220V STATION BATTERY & CHARGER SIZING CALCULATION Checked by SB Date 24.02.11

Doc. No. E-GLI1-721-14-0001 Rev. No 00 Apprd. by DN Date 24.02.11

Page 1 of 4

CONTENTS

SL. NO. DESCRIPTION

PAGE NO.

1 PURPOSE & SCOPE 2

2 DESIGN INPUT 2

3 ASSUMPTIONS 2

4 METHODOLOGY AND ACCEPTANCE CRITERIA 3

5 CALCULATIONS 3

6 RESULTS 3

7 REFERENCES 3

8 ATTACHMENTS 3




Page 2 of 4

1. PURPOSE AND SCOPE

Purpose:

The purpose of this calculation is to calculate the Battery and battery charger size.

Scope:

The scope of this calculation includes sizing of the battery and battery charger, which

would meet the station DC requirements of 225MW Combined Cycle Gas Based Power

Plant at Kashipur, Uttrakhand.

2. DESIGN INPUTS a) Key Single Line Diagram, Drg. No. TE-GLI1-700-0100.

b) Design Criteria of Plant Electrical System, Doc. No.: E-GLI1-700-14-0001

c) Electrical load list - Doc. No.: E-GLI1-700-14-0005

d) DC power consumption of Switchgears from Vendor Catalogues.

e) K-factors for Ni-Cd battery based on M/s. SabNife catalogue.

3. ASSUMPTIONS a) Switchyard DC loads are also to be fed from station DC battery. The same are assumed as

per previous project data. b) GTG DC loads have not been considered for battery sizing calculation as these loads

would be fed from dedicated DC system supplied by GTG manufacturer.

c) End cell voltage and Float cell voltage are considered as 1.14V and 1.42V respectively. d) Minimum site ambient temperature is 3OC. For cell sizing, lowest electrolyte temperature is

assumed as 8O

e) Fully charged voltage of one cell is considered as 1.2V for Ni-Cd battery.

C.

f) Float charging current for Ni-Cd cell is taken as 2mA per Ah. Boost-charging current is

assumed as 20 % of Ah rating of battery.

g) Spring Charging motors of all LV air circuit breakers shall be DC.

h) Tripping/closing of SFC transformer feeder is not considered for battery sizing as this

would not occur during plant shutdown.




Page 3 of 4

4. METHODOLOGY AND ACCEPTANCE CRITERIA

METHODOLOGY:

(i) Ni-Cd battery:

Based on the specified DC load cycle, first the Ah capacity of battery required is established.

Number of cells required is then calculated based on the maximum system voltage and float

cell voltage.

Alternatively where there is wide voltage window & long discharge times are required the no of

cells are calculated based on the end cell voltage.

The battery charger rating is calculated based on higher of (i) [(Continuous current + trickle

charging current) x 1.2 + Trial run current of highest rating motor] and (ii) boost charging

current.

ACCEPTANCE CRITERIA:

a) The battery Ah capacity shall be such that the DC power requirement during the specified

load cycle is adequately met.

b) Number of cells shall be such that in any case the voltage at DCDB remains within 0.88 pu

and 1.1 pu.

5. CALCULATIONS

Annexure- 2, 3 & 4 shows the calculation for Ni-Cd battery & charger as per methodology

given in Section 4.

6. RESULTS

Rating of 220 V DC battery and battery charger is as follows:

Ni-Cd Battery

Ah capacity of battery: 785 Ah

Number of cells required: 170 cells

Ampere rating of Battery Charger: 200 A

NOTE

: Final battery size shall be selected by the vendor based on the vendors K-factor (Capacity factor) values.




Page 4 of 4

7. REFERENCE

a) IEEE Recommended practice for sizing Nickel-Cadmium Batteries for stationary

Applications (IEEE Std 1115).

8. ATTACHMENTS a) Annexure 1 : Load tabulation

b) Annexure 2 : Battery sizing calculation

c) Annexure 3 : Verification of Ni-Cd battery size selected in Annexure-2

d) Annexure 4 : Battery Charger sizing calculation

Project: 225 MW COMBINED CYCLE GAS BASED POWER PLANTDoc. Code: E-GLI1-721-14-0001

Annexure 1Load tabulation

Rev. 00

Sr. No. Description Duty Cycle

No. of feeders considered

Qty. per feeder W Amp. W Amp. 0-1 min. 1-15 min. 15-16 min.16-59 min. 59-60 min. Remarks

(F) (Q) (W1) (A1=W1/220(W = W1*F*Q) A = (W/220)

6.6kV Unit Auxiliary Switchgear

1 Incomer breaker trip 0-1 min. 2 1 200.00 0.909 400.00 1.818 1.818 0.000 0.000 0.000 0.000

2 Bus Coupler breaker trip 0-1 min. 0 1 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.000 Bus Coupler is considered NO.

3 Outgoing breaker trip 0-1 min. 2 1 200.00 0.909 400.00 1.818 1.818 0.000 0.000 0.000 0.000

4 LED indication for

a Incomer Continuous 2 6 2.00 0.009 24.00 0.109 0.109 0.109 0.109 0.109 0.109

b Bus Coupler Continuous 1 5 2.00 0.009 10.00 0.045 0.045 0.045 0.045 0.045 0.045

c Outgoing feeders Continuous 15 6 2.00 0.009 180.00 0.818 0.818 0.818 0.818 0.818 0.818

d BUS PT Continuous 2 3 2.00 0.009 12.00 0.055 0.055 0.055 0.055 0.055 0.055

5 Protective relay for each incomer a Multi Function Relay (51, 51N, 25) Continuous 2 1 30.00 0.136 60.00 0.273 0.273 0.273 0.273 0.273 0.273

b Lockout relay (86) 0-1 min. 2 1 50.00 0.227 100.00 0.455 0.455 0.000 0.000 0.000 0.000

c Trip circuit supervision relay (95) Continuous 2 1 5.00 0.023 10.00 0.045 0.045 0.045 0.045 0.045 0.045

d Standby Earthfault relay (51NS) Continuous 2 1 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

e Auxiliary relays Continuous 2 5 5.00 0.023 50.00 0.227 0.227 0.227 0.227 0.227 0.227

6 Protective relay for bus-tie breaker protectiona Multi Function Relay (51, 51N, 25) Continuous 1 1 30.00 0.136 30.00 0.136 0.136 0.136 0.136 0.136 0.136



d Undervoltage relay (27) (with timer) Continuous 1 2 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

e No voltage relay (27N) Continuous 1 2 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

f Auxiliary relays Continuous 1 5 5.00 0.023 25.00 0.114 0.114 0.114 0.114 0.114 0.114

Unit load (as per ) Total Load Emergency Loads in Amps.

6.6kV Swgr Page 1



Rev. 00




(F) (Q) (W1) (A1=W1/220(W = W1*F*Q) A = (W/220)


7 Protective relay for outgoing motor feeder

a Composite motor protection relay (2, 27, 46, 50, 50N, 51, 87*)

Continuous 5 1 30.00 0.136 150.00 0.682 0.682 0.682 0.682 0.682 0.682



d Auxiliary relays Continuous 5 5 5.00 0.023 125.00 0.568 0.568 0.568 0.568 0.568 0.568

8 Protective relay for outgoing transformer feeder a Multi Function Relay (50, 50N, 51) Continuous 10 1 30.00 0.136 300.00 1.364 1.364 1.364 1.364 1.364 1.364



d Auxiliary relays Continuous 10 5 5.00 0.023 250.00 1.136 1.136 1.136 1.136 1.136 1.136

9 Spring charging motor 59-60 min. 2 1 500.00 2.273 1000.00 4.545 0.000 0.000 0.000 0.000 4.545

10 Closing coil of breaker 59-60 min. 2 1 200.00 0.909 400.00 1.818 0.000 0.000 0.000 0.000 1.818

11 Antipumping contactor 59-60 min. 2 1 5.00 0.023 10.00 0.045 0.000 0.000 0.000 0.000 0.04512 Transducers Continuous 44 5.00 0.023 220.00 1.000 1.000 1.000 1.000 1.000 1.00013 Multi Function Meter Continuous 18 1 100.00 0.455 1800.00 8.182 8.182 8.182 8.182 8.182 8.182

Sub total for 6600V Switchgear = 5860.00 20.227 15.227 15.227 15.227 21.636

6.6kV Swgr Page 2



Rev. 00


No. of feeders


(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)

415V Unit Switchgear1 Incomer breaker trip 0-1 min. 2 1 200.00 0.909 400.00 1.818 1.818 0.000 0.000 0.000 0.0002 Bus Coupler breaker trip 0-1 min. 0 1 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.0003 Outgoing breaker trip 0-1 min. 0 1 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.000

4 LED indication fora Incomer Continuous 2 4 2.00 0.009 16.00 0.073 0.073 0.073 0.073 0.073 0.073b Bus Coupler breaker Continuous 1 4 2.00 0.009 8.00 0.036 0.036 0.036 0.036 0.036 0.036c Outgoing feeders Continuous 11 4 2.00 0.009 88.00 0.400 0.400 0.400 0.400 0.400 0.400

5 Protective relay for incomera Multi Function Relay (51, 51N, 25) Continuous 2 1 30.00 0.136 60.00 0.273 0.273 0.273 0.273 0.273 0.273b Lockout relay (86) 0-1 min. 2 1 50.00 0.227 100.00 0.455 0.455 0.000 0.000 0.000 0.000c Trip circuit supervision relay (95) Continuous 2 1 3.20 0.015 6.40 0.029 0.029 0.029 0.029 0.029 0.029d Undervoltage relay (27) Continuous 2 1 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036e Auxiliary relay Continuous 2 4 5.00 0.023 40.00 0.182 0.182 0.182 0.182 0.182 0.182

6 Protective relay for bus coupler a Multi Function Relay (51, 51N,25) Continuous 1 1 30.00 0.136 30.00 0.136 0.136 0.136 0.136 0.136 0.136b Lockout relay (86) 0-1 min. 0 1 50.00 0.227 0.00 0.000 0.000 0.000 0.000 0.000 0.000c Trip circuit supervision relay (95) Continuous 1 1 3.20 0.015 3.20 0.015 0.015 0.015 0.015 0.015 0.015d Undervoltage relay (27) Continuous 1 2 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036e Auxiliary relay Continuous 1 4 5.00 0.023 20.00 0.091 0.091 0.091 0.091 0.091 0.091

7 Protective relay for outgoing feedera Composite protection relay (51, 51N) Continuous 11 1 30.00 0.136 330.00 1.500 1.500 1.500 1.500 1.500 1.500b Lockout relay (86) 0-1 min. 0 1 50.00 0.227 0.00 0.000 0.000 0.000 0.000 0.000 0.000c Trip circuit supervision relay (95) Continuous 11 1 3.20 0.015 35.20 0.160 0.160 0.160 0.160 0.160 0.160d Auxiliary relay Continuous 11 4 5.00 0.023 220.00 1.000 1.000 1.000 1.000 1.000 1.000

8 Spring charging motor 59-60 min. 2 1 500.00 2.273 1000.00 4.545 0.000 0.000 0.000 0.000 4.545 From ABB calalogue for ACB9 Antipumping contactor 59-60 min. 2 1 5.00 0.023 10.00 0.045 0.000 0.000 0.000 0.000 0.04510 Closing coil of breaker 59-60 min. 2 1 200.00 0.909 400.00 1.818 0.000 0.000 0.000 0.000 1.818 From ABB calalogue for ACB11 Transducers Continuous 20 5.00 0.023 100.00 0.455 0.455 0.455 0.455 0.455 0.45512 Multifunction Meter Continuous 3 1 100.00 0.455 300.00 1.364 1.364 1.364 1.364 1.364 1.364 I/C and B/C considered only

Sub total for 415V Unit Switchgear = 3182.80 8.058 5.785 5.785 5.785 12.195


From ABB calalogue for ACB

415V Unit swgr Page 3



Rev. 00


feeders considered


(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)

415V Station Switchgear


2 Bus-tie breaker trip 0-1 min. 0 1 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.0003 Outgoing breaker trip 0-1 min. 0 1 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.000



b Bus Coupler breaker Continuous 1 4 2.00 0.009 8.00 0.036 0.036 0.036 0.036 0.036 0.036


5 Protective relay for incomera Multi Function Relay (51, 51N, 25) Continuous 2 1 30.00 0.136 60.00 0.273 0.273 0.273 0.273 0.273 0.273b Lockout relay (86) 0-1 min. 2 1 50.00 0.227 100.00 0.455 0.455 0.000 0.000 0.000 0.000


d Undervoltage relay (27) Continuous 2 1 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

e Auxiliary relay Continuous 2 4 5.00 0.023 40.00 0.182 0.182 0.182 0.182 0.182 0.182

6 Protective relay for bus coupler a Multi Function Relay (51, 51N, 25) Continuous 1 1 30.00 0.136 30.00 0.136 0.136 0.136 0.136 0.136 0.136





7 Protective relay for outgoing feedera Composite protection relay Continuous 10 1 30.00 0.136 300.00 1.364 1.364 1.364 1.364 1.364 1.364




8 Spring charging motor 59-60 min. 2 1 500.00 2.273 1000.00 4.545 0.000 0.000 0.000 0.000 4.545 From ABB calalogue for ACB9 Antipumping contactor 59-60 min. 2 1 5.00 0.023 10.00 0.045 0.000 0.000 0.000 0.000 0.045

10 Closing coil of breaker 59-60 min. 2 1 200.00 0.909 400.00 1.818 0.000 0.000 0.000 0.000 1.818 From ABB calalogue for ACB11 Transducers Continuous 20 5.00 0.023 100.00 0.455 0.455 0.455 0.455 0.455 0.45512 Multifunction Meter Continuous 3 1 100.00 0.455 300.00 1.364 1.364 1.364 1.364 1.364 1.364 I/C and B/C considered only

Sub total for 415V Station Switchgear = 3191.60 8.098 5.598 5.598 5.598 12.007



415V Stn. swgr Page 4



Rev. 00



Qty. per feeder W Amp. W Amp. 0-1 min. 1-15 min. 15-16 min. 16-59 min. 59-60 min. Remarks

(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)

415V Essential Board


2 Bus-tie breaker trip 0-1 min. 0 1 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.0003 Outgoing breaker trip 0-1 min. 1 1 200.00 0.909 200.00 0.909 0.909 0.000 0.000 0.000 0.000



b Bus Coupler breaker Continuous 1 4 2.00 0.009 8.00 0.036 0.036 0.036 0.036 0.036 0.036


5 Protective relay for incomera Multi Function Relay (51, 51N, 25) Continuous 3 1 30.00 0.136 90.00 0.409 0.409 0.409 0.409 0.409 0.409b Lockout relay (86) 0-1 min. 2 1 50.00 0.227 100.00 0.455 0.455 0.000 0.000 0.000 0.000c Trip circuit supervision relay (95) Continuous 3 1 3.20 0.015 9.60 0.044 0.044 0.044 0.044 0.044 0.044



6 Protective relay for bus-tie breakera Multi Function Relay (51, 51N, 25) Continuous 1 1 30.00 0.136 30.00 0.136 0.136 0.136 0.136 0.136 0.136





7 Protective relay for outgoing feedera Composite protection relay Continuous 2 1 30.00 0.136 60.00 0.273 0.273 0.273 0.273 0.273 0.273



d Auxiliary relay Continuous 2 4 5.00 0.023 40.00 0.182 0.182 0.182 0.182 0.182 0.182

8 Transducers Continuous 17 5.00 0.023 85.00 0.386 0.386 0.386 0.386 0.386 0.3869 Spring charging motor 59-60 min. 2 1 500.00 2.273 1000.00 4.545 0.000 0.000 0.000 0.000 4.545 From ABB calalogue for ACB10 Antipumping contactor 59-60 min. 2 1 5.00 0.023 10.00 0.045 0.000 0.000 0.000 0.000 0.04511 Closing coil of breaker 59-60 min. 2 1 200.00 0.909 400.00 1.818 0.000 0.000 0.000 0.000 1.818 From ABB calalogue for ACB

12 Multifunction Meter Continuous 3 1 100.00 0.455 300.00 1.364 1.364 1.364 1.364 1.364 1.364 I/C and B/C considered only

Sub total for 415V Essential Board = 2912.20 6.828 3.419 3.419 3.419 9.828



415V Ess. Bd Page 5



Rev. 00




(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)

STG MCC / HRSG MCC / Stn. Aux. MCC / ACC MCC / WTP MCC / HVAC MCC / FIN FAN COOLER MCC:

1 Protective relay for incomers & Bus tie breakers

a Multi Function Relay Continuous 16 1 30.00 0.136 480.00 2.182 2.182 2.182 2.182 2.182 2.182

b Trip circuit supervision relay (95) Continuous 16 1 3.20 0.015 51.20 0.233 0.233 0.233 0.233 0.233 0.233

c Auxiliary relay Continuous 24 3 5.00 0.023 360.00 1.636 1.636 1.636 1.636 1.636 1.636


a incomer & bus tie breakers Continuous 24 4 2.00 0.009 192.00 0.873 0.873 0.873 0.873 0.873 0.873

3 Transducers Continuous 84 5.00 0.023 420.00 1.909 1.909 1.909 1.909 1.909 1.909

Sub total for 415V MCCs = 1503.20 6.833 6.833 6.833 6.833 6.833


Other 415V MCCs Page 6



Rev. 00



Qty. per feeder kW Inrush Current Amp. kW Inrush Current Amp. 0-1 min. 1-15 min. 15-16 min. 16-59 min. 59-60 min. Remarks

(F) (Q) (W1) A1=2*(W1/220) (A1=W1*1000/220) (W = W1*F*Q) A1=2*(W/220) (A1=W*1000/220)

DC Motor loads:

1 EOP for STG 0-60 min. 1 1 7.50 75.758 37.879 7.50 75.758 37.879 75.758 37.879 37.879 37.879 37.879

2 JOP for STG 15-60 min. 1 1 17.00 171.717 85.859 17.00 171.717 85.859 0.000 0.000 171.717 85.859 85.859

Sub total for Motor Loads = 24.50 75.758 37.879 209.596 123.737 123.737


Motors Page 7



Rev. 00




(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)

1 GTG GCB

a GCB trip coil - 1 0-1 min. 2 1 540.00 2.455 1080.00 4.909 4.909 0.000 0.000 0.000 0.000

b GCB trip coil - 2 0-1 min. 2 1 540.00 2.455 1080.00 4.909 4.909 0.000 0.000 0.000 0.000

Disconnector Switch opening 0-1 min. 2 1 500.00 2.273 1000.00 4.545 4.545 0.000 0.000 0.000 0.000

Earth Switch closing 0-1 min. 2 2 500.00 2.273 2000.00 9.091 9.091 0.000 0.000 0.000 0.000

c LED indication for GCB Continuous 2 6 1.00 0.005 12.00 0.055 0.055 0.055 0.055 0.055 0.055

d Closing coil of breaker 59-60 min. 2 1 540.00 2.455 1080.00 4.909 0.000 0.000 0.000 0.000 4.909

e Spring charging motor 59-60 min. 2 1 1800.00 8.182 3600.00 16.364 0.000 0.000 0.000 0.000 16.364

f Antipumping contactor 59-60 min. 2 1 5.00 0.023 10.00 0.045 0.000 0.000 0.000 0.000 0.045

g Auxiliary relay Continuous 2 11 5.00 0.023 110.00 0.500 0.500 0.500 0.500 0.500 0.500

h Tripping supervision relay coil Continuous 2 2 2.50 0.011 10.00 0.045 0.045 0.045 0.045 0.045 0.045

j Signalling convertor Continuous 2 1 12.00 0.055 24.00 0.109 0.109 0.109 0.109 0.109 0.109

k Illumination 59-60 min. 2 1 40.00 0.182 80.00 0.364 0.000 0.000 0.000 0.000 0.364

l Latching type relay coil 1 Continuous 2 4 1.60 0.007 12.80 0.058 0.058 0.058 0.058 0.058 0.058

m Latching type relay coil 2 Continuous 2 4 2.50 0.011 20.00 0.091 0.091 0.091 0.091 0.091 0.091

n Disconnector Switch closing 59-60 min. 2 1 500.00 2.273 1000.00 4.545 0.000 0.000 0.000 0.000 4.545

o Earth Switch opening 59-60 min. 2 2 500.00 2.273 2000.00 9.091 0.000 0.000 0.000 0.000 9.091

q Heating Resistance Continuous 2 1 45.00 0.205 90.00 0.409 0.409 0.409 0.409 0.409 0.409

r Circuit Breaker mechanism heating resistan Continuous 2 1 150.00 0.682 300.00 1.364 1.364 1.364 1.364 1.364 1.364

s Mechanism heating resistance Continuous 2 3 45.00 0.205 270.00 1.227 1.227 1.227 1.227 1.227 1.227

t Socket 59-60 min. 2 1 3680.00 16.727 7360.00 33.455 0.000 0.000 0.000 0.000 33.455

2 STG GRP

aComposite Generator Protection Relay -1 (21, 24, 27P, 27TN, 32, 40, 46, 51PV, 59N, 59P, 78, 81O, 81U, 87G)

Continuous 1 1 154.00 0.700 154.00 0.700 0.700 0.700 0.700 0.700 0.700

bComposite Generator Protection Relay -2 (21, 24, 27P, 27TN, 32, 40, 46, 51PV, 59N, 59P, 78, 81O, 81U, 87G)

Continuous 1 1 154.00 0.700 154.00 0.700 0.700 0.700 0.700 0.700 0.700

c Lockout relay (86) 0-1 min. 1 3 65.00 0.295 195.00 0.886 0.886 0.000 0.000 0.000 0.000


Other DC loads Page 8



Rev. 00




(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)


d Trip circuit supervision relay (95) Continuous 1 3 5.00 0.023 15.00 0.068 0.068 0.068 0.068 0.068 0.068

e Rotor E/F Relay Continuous 1 1 5.00 0.023 5.00 0.023 0.023 0.023 0.023 0.023 0.023

f Back up E/F Relay Continuous 1 1 5.00 0.023 5.00 0.023 0.023 0.023 0.023 0.023 0.023

g DC Supervision Relay Continuous 1 1 5.00 0.023 5.00 0.023 0.023 0.023 0.023 0.023 0.023

h Auxiliary relay Continuous 1 10 7.00 0.032 70.00 0.318 0.318 0.318 0.318 0.318 0.318

i Indicating Lamps Continuous 1 3 2.00 0.009 6.00 0.027 0.027 0.027 0.027 0.027 0.027

3 STG Control cum Synchronization Panel

a Indicating Lamps Continuous 1 30 2.00 0.009 60.000 0.273 0.273 0.273 0.273 0.273 0.273

b Hooter 0-1 min. 1 2 20.00 0.091 40.000 0.182 0.182 0.000 0.000 0.000 0.000

c VAA21 - Aux Relay 0-1 min. 1 1 3.00 0.014 3.000 0.014 0.014 0.000 0.000 0.000 0.000

d Semaphore Indicators Continuous 1 6 3.00 0.014 18.000 0.082 0.082 0.082 0.082 0.082 0.082

e DC Power unit for auto synchronization 59-60 min. 1 1 42.00 0.191 42.000 0.191 0.000 0.000 0.000 0.000 0.191

f Temperature Scanner Continuous 1 1 10.00 0.045 10.000 0.045 0.045 0.045 0.045 0.045 0.045

g Auxiliary relay Continuous 1 25 7.00 0.032 175.000 0.795 0.795 0.795 0.795 0.795 0.795

h Annunciator (48 Windows) Continuous 1 1 100.00 0.455 100.000 0.455 0.455 0.455 0.455 0.455 0.455

0-1 min. 1 48 0.25 0.001 12.000 0.055 0.055 0.000 0.000 0.000 0.000

i Others Continuous 1 1 100.00 0.455 100.00 0.455 0.455 0.455 0.455 0.455 0.455

4 STG GOVP/VIB. Panel Continuous 1 1 320.00 1.455 320.00 1.455 1.455 1.455 1.455 1.455 1.455

5 STG Field Instruments (Future) Continuous 6 60.00 0.273 360.00 1.636 1.636 1.636 1.636 1.636 1.636

0-1 min. 1 1 100.00 0.455 100.00 0.455 0.455 0.000 0.000 0.000 0.000

6 STG AVR & Excitation system

a Control supply for STG AVR Continuous 1 2 200.00 0.909 400.00 1.818 1.818 1.818 1.818 1.818 1.818

b Auxiliary relay Continuous 1 8 7.00 0.032 56.00 0.255 0.255 0.255 0.255 0.255 0.255

c Indicating Lamps Continuous 1 10 2.00 0.009 20.00 0.091 0.091 0.091 0.091 0.091 0.091




Rev. 00




(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q) A = (W/220)


7 GSUT(GTG Trafo.) & UAT Protection panel

a GSUT Differential Protection (87T) Continuous 2 1 50.00 0.227 100.00 0.455 0.455 0.455 0.455 0.455 0.455

b Volts/Hz relay (24) Continuous 2 1 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

c Restricted earth fault relay (64R) Continuous 2 1 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

d Standby earth fault relay (51NS) Continuous 2 1 4.00 0.018 8.00 0.036 0.036 0.036 0.036 0.036 0.036

e UAT Differential Protection(87UT) Continuous 2 1 50.00 0.227 100.00 0.455 0.455 0.455 0.455 0.455 0.455

8 GSUT Protection panel (STG Trafo.)

a Transformer Differential Protection (87T) Continuous 1 1 50.00 0.227 50.00 0.227 0.227 0.227 0.227 0.227 0.227

b Overall Differential Protection (87OA) Continuous 1 1 50.00 0.227 50.00 0.227 0.227 0.227 0.227 0.227 0.227

c Volts/Hz relay (24) Continuous 1 1 4.00 0.018 4.00 0.018 0.018 0.018 0.018 0.018 0.018

d Restricted earth fault relay (64R) Continuous 1 1 4.00 0.018 4.00 0.018 0.018 0.018 0.018 0.018 0.018

e Standby earth fault relay (51NS) Continuous 1 1 4.00 0.018 4.00 0.018 0.018 0.018 0.018 0.018 0.018

9 RTCC Panel (for GTG #1 GSUT) Continuous 1 1 440.00 2.000 440.00 2.000 2.000 2.000 2.000 2.000 2.000

10 RTCC Panel (for GTG #2 GSUT) Continuous 1 1 440.00 2.000 440.00 2.000 2.000 2.000 2.000 2.000 2.000

11 RTCC Panel (for STG #1 GSUT) Continuous 1 1 440.00 2.000 440.00 2.000 2.000 2.000 2.000 2.000 2.000

12 RTCC Panel (for UAT #1 & UAT #2) Continuous 2 1 440.00 2.000 880.00 4.000 4.000 4.000 4.000 4.000 4.000

13 DC Emergency Lighting 0-60 min. 1 1 30000.00 136.364 30000.00 136.364 136.364 136.364 136.364 136.364 136.364

14 ETS trip solenoid Continuous 1 1 500.00 2.273 500.00 2.273 2.273 2.273 2.273 2.273 2.273

Sub total = 56599.80 188.308 163.263 163.263 163.263 232.226




Rev. 00

Sr. No. Description Duty Cycle W Amp. W Amp. 0-1 min. 1-15 min. 15-16 min. 16-59 min. 59-60 min. Remarks

(F) (Q) (W1) (A1=W1/220) (W = W1*F*Q A = (W/220)

220kV Switchyard1 Incoming bay breaker trip 0-1 min. 3 2 200.00 0.909 1200.00 5.455 5.455 0.000 0.000 0.000 0.0002 Bus Coupler breaker trip 0-1 min. 0 2 200.00 0.909 0.00 0.000 0.000 0.000 0.000 0.000 0.000 Bus Coupler is NO.3 Line bay breaker trip 0-1 min. 2 2 200.00 0.909 800.00 3.636 3.636 0.000 0.000 0.000 0.000

Disconnector Switch motor opening 0-1 min. 5 2 500.00 2.273 5000.00 22.727 22.727 0.000 0.000 0.000 0.000

4 LED indication fora Incoming Bay Continuous 3 10 2.00 0.009 60.00 0.273 0.273 0.273 0.273 0.273 0.273b Bus Coupler Continuous 1 10 2.00 0.009 20.00 0.091 0.091 0.091 0.091 0.091 0.091c Line Bay Continuous 2 10 2.00 0.009 40.00 0.182 0.182 0.182 0.182 0.182 0.182

5 Line & Bus Coupler Protection Panel

a Multi Function Relay Continuous 3 2 100.00 0.455 600.00 2.727 2.727 2.727 2.727 2.727 2.727b Lockout relay (86) 0-1 min. 2 4 65.00 0.295 520.00 2.364 2.364 0.000 0.000 0.000 0.000c Trip circuit supervision relay (95) Continuous 2 2 5.00 0.023 20.00 0.091 0.091 0.091 0.091 0.091 0.091d Auxiliary relays Continuous 3 5 5.00 0.023 75.00 0.341 0.341 0.341 0.341 0.341 0.341

5 Bus Bar Protection Panela Bus Bar Protection Relay Continuous 2 2 100.00 0.455 400.00 1.818 1.818 1.818 1.818 1.818 1.818b Auxiliary relays Continuous 2 4 5.00 0.023 40.00 0.182 0.182 0.182 0.182 0.182 0.182

5 Bay Controla Bay Control Unit Continuous 6 2 100.00 0.455 1200.00 5.455 5.455 5.455 5.455 5.455 5.455b Auxiliary relays Continuous 6 5 5.00 0.023 150.00 0.682 0.682 0.682 0.682 0.682 0.682c Disconnector Switch motor closing 59-60 min. 1 2 500.00 2.273 1000.00 4.545 0.000 0.000 0.000 0.000 4.545d Breaker closing coil 59-60 min. 1 1 200.00 0.909 200.00 0.909 0.000 0.000 0.000 0.000 0.909e Spring Charging Motor for Breaker 59-60 min. 1 1 1800.00 8.182 1800.00 8.182 0.000 0.000 0.000 0.000 8.182 Same as GCB load

Sub total = 46.02 46.023 11.841 11.841 11.841 25.477


N

o

.

o

f

f

e

e

d

e

r

s

c

o

n

s

i

d

e

r

e

Q

t

y

.

p

e

r

f

e

e

d

e

r

Switchyard loads Page 11


Annexure 2220V Station Battery sizing calculation

Rev. 00

LOAD CYCLE :PERIOD LOAD (AMP.)0-1min. 360.13 A11-15min. 249.85 A215-16min. 421.56 A316-59min. 335.70 A459-60min. 443.94 A5

Sr. Continuou

0.00

250.00

500.00

A

m

p

s

LOAD CYCLE

0-1min.

1-15min.

15-16min.

16-59min.

59-60min.

Page 1

No. System/Loads (Amps) 0-1min. 1-15min. 15-16min. 16-59min. 59-60min. s Load1 Sub total for 6600V Switchgear 20.227 15.227 15.227 15.227 21.636 15.2272 Sub total for 415V Unit Switchgear 8.058 5.785 5.785 5.785 12.195 5.7853 Sub total for 415V Station Switchgear 8.098 5.598 5.598 5.598 12.007 5.5984 Sub total for 415V Essential Board 6.828 3.419 3.419 3.419 9.828 3.4195 Sub total for other 415V MCCs 6.833 6.833 6.833 6.833 6.833 6.8336 Sub total for Motor Loads 75.758 37.879 209.596 123.737 123.737 0.0007 Sub Total of other DC loads 188.308 163.263 163.263 163.263 232.226 26.8998 Sub Total of Switchyard DC loads 46.023 11.841 11.841 11.841 25.477 11.841

Total in Amps = 360.133 249.845 421.562 335.704 443.940 75.603

Electrolyte temperature assumed to be 5OC higher than min. ambient temperature(3OC)

K-Factor:As per Sabnife catalogue Cell KPH 580P matches with the duty cycle. Capacity factors determined based on the discharge data of KPH 580P as given below:.

1 min. 10 min. 14 min. 15 min. 16 min. 30 min. 43 min. 44 min. 45 min. 58 min. 59 min. 60 min.0.37 0.60 0.66 0.67 0.68 0.87 1.05 1.06 1.08 1.26 1.27 1.28

Duration K - Factor

(Ah/A)

Page 1



Rev. 00

Period Load Amperes Change in load Amps Duration in min. Time to end of section (min.) K Factor Temperature derating Required section size Remarks

A B C IF A>0, AXBXC

IF A



Rev. 00

No of cell Calculation

1 Specification requirement:a) Type of Batteries: Ni-Cdb) Back-up time: 60min.c) Temperature Correction Factor shall be based on following Ambient temperature

Max. Ambient : 50 OCMin. Ambient : 3 OCNote: Electrolyte temperature assumed to be 5OC higher than min. ambient temperature, i.e., 15OC

d) Nominal System DC Voltage (V): 220 Ve) Maximum system voltage (+10%): 242 Vf) minimum voltage at consumer end(considering 15% voltage drop from battery / charger to load) = 187 Vg) Minimum voltage at DCDB bus (considering 3% voltage drop in the cable from DCDB to load) = 187+(220*3/100 193.6 V

2 BATTERY SIZING :

Sizing for no. of cells :

Highest pemissible system voltage = 242 V

Lowest permissible voltage at DCDB bus = 193.6 V

Float voltage / cell: 1 42 V (As per Sabnife catalogue)

Page 3

Float voltage / cell: 1.42 V (As per Sabnife catalogue)

170.42

169.82

No. of cells selected = 170 (To limit the minimum voltage greater than 193.6 V at DCDB)

Maximum Voltgae = 241.40 V (Less than 242 V)

Lowest permissible battery voltage =End cell voltage

No. of cells based on max. system DC voltage :Highest permissible battery voltage =

Float cell voltage

No. of cells considering end cell voltage = 1.14 V/Cell :

Page 3


Annexure 3Verification of Ni-Cd battery size selected in Annexure-2

Rev. 00

LOAD CYCLE :PERIOD LOAD (AMP.)0-1min. 360.13 A11-15min. 249.85 A215-16min. 421.56 A316-59min. 335.70 A459-60min. 443.94 A5

S C ti

0.00

250.00

500.00

A

m

p

s

LOAD CYCLE

0-1min.

1-15min.

15-16min.

16-59min.

59-60min.

Page 1

Sr. No. System/Loads (Amps) 0-1min. 1-15min. 15-16min. 16-59min. 59-60min.

Continuous Load

1 Sub total for 6600V Switchgear 20.227 15.227 15.227 15.227 21.636 15.2272 Sub total for 415V Unit Switchgear 8.058 5.785 5.785 5.785 12.195 5.7853 Sub total for 415V Station Switchgear 8.098 5.598 5.598 5.598 12.007 5.5984 Sub total for 415V Essential Board 6.828 3.419 3.419 3.419 9.828 3.4195 Sub total for other 415V MCCs 6.833 6.833 6.833 6.833 6.833 6.8336 Sub total for Motor Loads 75.758 37.879 209.596 123.737 123.737 0.0007 Sub Total of other DC loads 188.308 163.263 163.263 163.263 232.226 26.8998 Sub Total of Switchyard DC loads 46.023 11.841 11.841 11.841 25.477 11.841

Total in Amps = 360.133 249.845 421.562 335.704 443.940 75.603

Electrolyte temperature assumed to be 5OC higher than min. ambient temperature(3OC)

K-Factor:From Annexure-2: KPH 785P matches with the final selected size. Corresponding K-factors are as given below:

1 min. 10 min. 14 min. 15 min. 16 min. 30 min. 43 min. 44 min. 45 min. 58 min. 59 min. 60 min.0.37 0.60 0.65 0.67 0.68 0.87 1.05 1.06 1.08 1.26 1.27 1.28

Duration K - Factor (Ah/A)

Page 1


Annexure 3Verification of Ni-Cd battery size selected in Annexure-2

Rev. 00

Period Load Amperes Change in load Amps Duration in min. Time to end of section (min.) K Factor Temperature derating Required section size Remarks

A B C IF A>0, AXBXC

IF A


Annexure - 4 Rev. 00

220V Station Battery charger sizing (For Ni-Cd Battery)

DC nominal voltage = 220 VBattery Ampere hour = 785 AHTrickle charging current = 2 mA/AH

Charger rating in accordance with the battery rating will be highest of :(i) [(Continuous current + trickle charging current) x 1.2 (20% design margin) ]+Trial run current of highest rating motor(ii) Boost charging current = AHx0.2

(i) Continuous current = 75.60 ATrial run current of highest rating motor (Jacking Oil Pump-17kW)= 85.86 A[(Continuous current + trickle charging current) x 1.2 (20% design margin)] + Trial run current of highest rating motor = 178.47 A

(ii) Boost charging current = AHx0.2 = 157.00 A

Therefore Battery charger rating = 178.47 ASelected Battery charger rating : 200 A

Charger for Ni-Cd battery Page 1

1.Cover Page-newGAMA INFRAPROP (P) LIMITED.LUNA INFRAPROP (P) LIMITED.

220V Battery & charger sizing - Control sheet220V Battery & charger sizing - Content- Cont sheetsPurpose:

Annexure-1Annexure-2Annexure-3Annexure-4

220vst_1

Documents

battery sizing calculation

station dc battery

battery charger size

nicd battery

cell sizing

dn date

sb date

rk date