269959985-Battery-Charger-Sizing-SS-1-Rev-03.pdf

PROJECT CLIENT CONSULTANTS CONTRACTOR DOCUMENT TITLE

DC BATTERY & BATTERY CHARGER SIZING CALCULATION FOR SS-1 & SS-2

DOCUMENT NO.

EL00211 REV.- 03

REFERENCE DOCUMENT NO.

1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V Page-55 of 272 Section 2.3

TABLE OF CONTENT SL.No.

DESCRIPTION

WORKSHEET No.

1

BASIS & ASSUMPTIONS

1

2

REFERENCE CATALOGUE

2

3

DC LOAD CALCULATION

3

4

BATTERY LOAD CYCLE DIAGRAM

4

5

BATTERY AMP-HOUR SIZING

5

6

CALCULATION FOR QUANTITY OF CELLS

6

7

BATTERY CHARGER SIZING

7

1 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03

1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) REFERENCE DOCUMENT 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V PageNO. 55 of 272 Section 2.3

WORKSHEET‐1

BASIS & ASSUMPTIONS 1.0 a) b) c) d) 2.0

PURPOSE The purpose of this calculation is To establish battery load cycle for 110V DC Battery. To determine the number of cells for 110V DC Battery. To determine the Ampere ‐ Hour rating of 110V DC Battery. To determine the rating of Battery Charger. DESIGN BASIS & ASSUMPTIONS

2 1 The sizing of Battery has been done on the basis of IEEE The sizing of Battery has been done on the basis of IEEE ‐ 485 :1997 485 :1997 2.1 2.2 The sizing of Battery Charger has been done on the basis of IEEE ‐ 946 : 1995. 2.3 110V DC Battery Bank shall be comprised of a bank of 2.0V rated Lead acid plante type battery. (Reference: Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume ‐ IV of V Page‐55 of 272 Section 2.4 110 V Lead acid plante type Battery Bank and Float cum Boost Charger has been considered for catering Control, Protection & Indication Load of 6.6 KV Switchboard of SS1, ACBs of PMCC Panel & other miscllenous loads. 2.5 The End Cell Voltage of each Battery Cell is 1.85 Volts. (End Cell Voltage ( ECV ) is taken as 1.85V as per Design Criteria of Technical Specification Volume IV of V, Clause ‐ 2.3.2, Pg 56 of 272) 2.6 Battery is sized for a back up duration of 10 hour for Load Duty Cycle. (Reference: Since nothing has been specified in Technical Specification, we have assumed 1hour back up duration for Load duty Cycle ). 2.7 DC Output Voltage shall be adjustable between +10% & ‐10% of Nominal rated voltage. (Reference: Technical Specification of DC System, Volume ‐ IV of V, Clause ‐ 2.3.3.2.5,ii , Page ‐ 61 of 272). 2.8 An Ageing Factor of 1.25 has been considered. 2.9 A nominal Design Margin of 10% has been considered for standard over sizing of battery to allow for unforseen operating conditions of the battery due to improper maintenance, recent discharge or ambient temperature lower than the anticipated or both. (Reference: as per IEEE ‐ 485 :1997, Clause‐6.2.2) 2.10 Battery is designed to be operated at a temprature range of 19 deg C to 33 deg C.However, design operating temprature has been considered as 27 deg C. (Reference: Technical Specification of DC System, Volume ‐ IV of V, Clause ‐ 2.3.3.1.2, Page ‐ 59 of 272).

2 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03

1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) REFERENCE DOCUMENT 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V PageNO. 55 of 272 Section 2.3

WORKSHEET‐1 2.11 Temperature Correction Factor has been taken as 1.25 at 8 deg C as per IEEE 485 :1997 2.12 Value of Capacity factor (KT) at 1min & 600min has been obtained from Manufacturer's Catalogue as attached herewith in "Reference Catalogue" worksheet. Further, the value of Capacity Factor (KT) at 588min & 599min are derived from the above two terminal values by the method of extrapolation. 2.12 Float Charge Voltage is 2.25 Volts per Cell .( As per Manufacturer's Catalogue ) we have consider one of the mfg. details for calculatuion ,after finalisation we will revsied it submit again 2.13 Boost Charge Voltage 2.60 Volts per Cell. ( As per Manufacturer's Catalogue ) we have consider one of the mfg. details for calculatuion ,after finalisation we will revsied it submit again. 2.14 While sizing of Battery Charger, it has been considered that battery shall have maximum recharge time of 10 hours as described herewith in "Reference Catalogue" worksheet. 2.15 This DC System will feed power to following loads: a) Control, Protection and Indication circuit of 6.6 KV HT Panel, b) Tripping Coil of incomer & buscoupler ACBs of PMCC Panel 2.16 The various loads for the battery duty cycle is consider as under The following duty cycle is considered a) The battery feeds the continuous loads of Indicating lamps,Relays,Contact multiplication equipment,etc. b) All the breakers are tripped c) At the end of the duty cycle,to resume power to the battery charger ,MV breakers are considered to be closed 2.17 Load Cycle Scenario a) Following DC loads are considered For First 0 to 1minute of Load Duty Cycle as per standard engineering and system requirement. 1) Tripping Coil of 6.6 KV HT Board Incomer VCB ‐ 1No. 2) Tripping Coil of 6.6 KV HT Board Transformer Outgoing VCB‐ 5No.(Including spare) 3) Tripping coil of 6.6KV HT Board Capacitor Outgoing VCB‐ 1No. 4) Tripping Coil of PMCC incomer ACB & Buscoupler ACB 5) Master Trip Relay for all incoming & outgoing feeder. b) DC loads on a/c of control, indication, annunciation and protection devices have been considered for Entire 0 to 600 minute duty cycle as per standard engineering and system requirement. 1) All protection relay,Aux. Relay ,Indicating Lamps,Annunciator ,hooter Aux. Contactor c) Following DC loads are considered at Last 599 to 600 minute duty cycle: 1) Closing Coil of 6.6 KV HT Board Incomer ‐ 1No. 2) Closing Coil of 6.6 KV HT Board Transformer Outgoing VCB‐ 5No.(Including spare) 3) Closing Coil of 6.6 KV HTBoard Capacitor Outgoing ‐ 1No.

3 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03

REFERENCE DOCUMENT 1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V Page-55 of NO. 272 S ti 23

Worksheet ‐2

REFERENCE CATALOGUE 1.0

END CELL VOLTAGE (ECV) End Cell Voltage ( ECV ) is taken as 1.85V as per Design Criteria of Technical Specification Volume IV of V, Clause ‐ 2.3.2, Pg 56 of 272

2.0 TEMPRATURE CORRECTION FACTOR OF BATTERY AS PER IEEE ‐ 485

4 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03


Worksheet ‐2

3.0

CAPACITY FACTOR (KT)

From above Capacity Factor Chart of chabbi, Capacity Factors at 27 deg C are derived as below: Time (Minute)

ECV‐1 (1.75V)

01

0.75

ECV‐2 (1.85V)

ECV‐3 (1.80V)

1.18

0.94

598

9 80 9.80

599

9.90

600

10

5 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03


Worksheet ‐2

4.0

FLOAT CHARGE VOLTAGE (FCV) & BOOST CHARGE VOLTAGE (BCV) As per Manufacturer's Catalogue

6.0

6.0

BATTERY RECHARGE TIME Float charge Voltage at 27 deg C

2.25

Boost charge Voltage at 27 deg C

2.60

BATTERY RECHARGE TIME As per Manufacturer's Catalogue, Battery Recharge time has been considered as 10 hours.

6 of 15

Volts / Cell Volts / Cell

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE

DC BATTERY & BATTERY CHARGER SIZING CALCULATION FOR SS-1 & SS-2 EL00211 REV.- 03

DOCUMENT NO.



Worksheet ‐3

DC LOAD CALCULATION (in WATT) SUBSTATION Feeder

Load Description

Quantity

Continous Load

Total Continous Load

Tripping Load

Closing Load

0 ~ 600min

0~600Min

0 ~ 1min (First Minute)

599 ~ 600min (Last Minute)

6.6 KV HT PANEL

6.6 KV Incomer (VCB)

Tripping Coil

1

0

0

200

0

Closing Coil

1

0

0

0

200

Spring charging for motor

1

0

0

0

200

Aux. Contactor

1

10

10

0

0

Breaker Contact multiplication Relay‐52X

1

3

3

0

0

Antipumping relay‐94(PLA)

1

6

6

0

0

Master Trip Relay‐86 (VAJHM23)

1

5

0

5

0

Trip Ckt Supervision Relay‐95(VAX31)

1

3

3

0

0

AC & DC Fail Relay‐80

2

4

8

0

0

Micom P‐127 Relay

1

4

4

0

0

Auxiliary Relay(VAA11)

3

9

27

0

0

Digital Multi Function Meter

1

4

4

0

0 0

Annunciator (8 Window)

1

12

12

0

Hooter

1

15

15

0

0

Aux Contactor

1

10

10

0

0

Indication Lamps

14

2

28

0

0

Timer R1/R2

2

3

6

0

0

Tripping Coil

5

0

0

1000

0

Closing Coil

5

0

0

0

1000

Spring charging for motor

5

0

0

0

200

Antipumping relay‐94(PLA)

5

6

30

0

0

Sensitive Earth Fault Relay‐50G(CTUM15)

5

2

10

0

0

Buchorz Relay‐Alarm Relay

5

3

17

0

0

6.6 KV HT PANEL

6.6 KV Outgoing (VCB) for Transformer ( X 5 Nos.)

Master Trip Relay‐86(VAJHM23)

5

5

0

5

0


5

3

15

0

0

Micom P‐127 Relay

5

4

20

0

0


15

9

135

0

0


5

4

20

0

0


5

12

60

0

0

Hooter

5

15

75

0

0

Aux Contactor

1

10

10

0

0

Indication Lamps

70

2

140

0

0

Timer R1/R2

10

3

30

0

0

Tripping Coil

1

0

0

200

0

1

0

0

0

200

1

0

0

0

200

1

6

6

0

0

6.6 KV HT PANEL

6.6 KV Outgoing Closing Coil (VCB) for Capacitor Panel ( X 1 no.) Spring charging for motor Antipumping relay‐94(PLA)

7 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE

DC BATTERY & BATTERY CHARGER SIZING CALCULATION FOR SS-1 & SS-2 EL00211 REV.- 03

DOCUMENT NO.



Worksheet ‐3

DC LOAD CALCULATION (in WATT) SUBSTATION Feeder

Load Description

Quantity

Continous Load

Total Continous Load

Tripping Load

Closing Load

0 ~ 600min

0~600Min

0 ~ 1min (First Minute)

599 ~ 600min (Last Minute)

Master Trip Relay‐86(VAJHM23)

1

5

0

5

0


1

3

3

0

0

Micom P‐127 Relay

1

4

4

0

0


1

4

4

0

0


1

12

12

0

0


1

9

9

0

0

Hooter

1

15

15

0

0

Aux Contactor

1

10

10

0

0

Indication Lamps

9

2

18

0

0

Timer R1/R2

2

3

6

0

0

Battery Charger Panel Indication Lamps

8

2

16

0

0


1

18

18

0

0

Hooter

1

0

0

0

0

Tripping Coil

1

0

0

200

0

27‐ Under Voltage Relay

1

4

4

0

0

Micro Logic Release

1

2

2

0

0

Tripping Coil

1

0

0

200

0

Closing Coil

1

0

0

0

0

Micro Logic Release

1

2

2

0

0

PMCC Panel

Incomer from Transformer

Buscoupler

a)

Continous Load in (W) For 0~600 Minute

b)

First Minute Load in (W) Between (0~1 Min)

c)

Last Minute Load in (W) Between (599~600 Min)

827.48 1813.50 2000.00

8 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03


1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V Page-55 of 272 Section 2.3 Worksheet ‐4

BATTERY LOAD CYCLE DIAGRAM TOTAL LOAD SUMMARY OF 110V DC SYSTEM ( SS‐1 OR SS‐2 SUBSTATION ) Sr. No.

LOAD PROFILE (WATT/ AMP)

DESCRIPTION

REMARKS

CONTINUOUS LOAD

TRIPPING*

CLOSING/CHARGING*

110V DC

(0~600 MIN)

(0~1 MIN)

(599~600 MIN)

1

DC Load In Wattage

827.48

1,814

2,000

In WATT

2

DC Load In Ampere

7.52

16.49

18.18

In AMPERE

NOTES: * : Momentary loads

LOAD CYCLE CALCULATION: SYSTEM VOLTAGE (VDC)

=

110

a) CONTINUOUS LOAD (AMPS) FROM 0 to 600 MINUTES

=

b) FIRST MINUTE LOAD (AMPS) FROM 0 to 1 MINUTE

=

16.49

c) LAST MINUTE LOAD (AMPS) FROM 599 TO 600 MINUTE

=

18.18

BATTERY DUTY CYCLE

=

600

BATTERY DUTY CYCLE TABLE: TIME (MINUTES)

CURRENT (AMPS)

0

0.00

0

24.01

1

24.01

1

7.52

599

7.52

599

25.70

600

25.70

600

25.70

9 of 15

Volts

TOTAL 7.52

Amps A2

7.52

24.01

Amps A1

7.52

25.70

Amps A3

MINUTES

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03



BATTERY DUTY CYCLE: BATTERY DUTY CYCLE 30.00

25.70

25.00

CURRENT- AMP

24.01

20.00

15.00

10.00

7.52

7.52

5.00

0.00 0

50

100

150

200

250

300

350

TIME-MINUTE

10 of 15

400

450

500

550

600

650

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03


1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V Page55 of 272 Section 2.3 Worksheet ‐ 5

BATTERY AMPERE ‐ HOUR SIZING CALCULATION NOMINAL SYSTEM VOLTAGE

:

110

VDC

(AS PER TECHNICAL SPECIFICATION)

MINIMUM SYSTEM VOLTAGE (‐10%)

:

99

VDC


MAXIMUM SYSTEM VOLTAGE (+10%)

:

123.2

VDC


NOMINAL CELL VOLTAGE (NCV)

:

2.0

VDC

(AS PER IEEE‐1115 AND TECHNICAL SPECIFICATION)

END CELL VOLTAGE (ECV)

:

1.85

VDC

(AS PER MANUFACTURER'S CATALOGUE)

FLOAT CELL VOLTAGE (FCV)

:

0.00

VDC


BOOST CELL VOLTAGE (BCV)

:

2.60

VDC


AGING FACTOR

:

1.25

DESIGN MARGIN 20%

:

1.20

(AS PER IEEE‐485‐1997)

TEMPERATURE CORRECTION FACTOR

:

1.25



BATTERY DUTY CYCLE :

600

A1

:

24.01

A2

:

7.52

A3

:

25.70

BATTERY BACK‐UP TIME

MINUTES

1

MINUTE FOLLOWED BY

AMPS FOR

599

MINUTE FOLLOWED BY

AMPS FOR LAST

1

MINUTE

CAPACITY FACTOR (KT) AS PER MANUFACTURER'S CATALOUGE

DURATION (MINUTE)

CAPACITY FACTOR

1

1.18

598

9.80

599

9.90

600

10.00

(ASSUMED BY SEI)

AMPS FOR FIRST

11 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03


1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V Page55 of 272 Section 2.3

CALCULATION OF BATTERY AMPERE‐HOUR AS PER IEEE‐485 (1)

(2)

(3)

(4)

(5)

(6)

(7)

PERIOD

LOADS (AMPS)

CHANGE IN LOADS (AMPS)

DURATION OF OPERATION (MINUTES)

TIME TO END SECTION (MINUTES)

CAPACITY RATING FACTOR AT t MIN. RATE (Kt)

REQUIRED SECTION SIZE‐ (3) x (6) RATE AH HRS

POS. VALUE

NEG. VALUE

28.33

0.00

SECTION‐1 FOR FIRST PERIOD ONLY AND IF A2 >A1 THEN GO TO SECTION‐2 1

A1

24.01

A1‐0

24.01

M1=1

1

T=M1

1

1.18 SECTION‐1 SUB TOTAL AH

0.00

28.33

28.33

SECTION‐1 TOTAL AH SECTION‐2 FOR FIRST TWO PERIODS ONLY AND IF A3>A2 THEN GO TO SECTION‐3 1

A1

24.01

A1‐0

24.01

M1

1

2

A2

7.52

A2‐A1

‐16.49

M2

598

T=M1+M2

599

9.90

237.69

0.00

T=M2

598

9.80

0.00

161.57

SECTION‐2 SUB TOTAL AH

237.69

161.57

76.12

SECTION‐2 TOTAL AH SECTION‐3 FOR FIRST THREE PERIODS ONLY AND IF A4>A3 THEN GO TO SECTION‐4 1

A1

24.01

A1‐0

24.01

M1

1

2

A2

7.52

A2‐A1

‐16.49

M2

598

3

A3

25.70

A3‐A2

18.18

M3

1

T=M1+M2+M3

600

10.000

240.09

0.00

T=M2+M3

599

9.900

0.00

163.22

T=M3

1

1.180 SECTION‐3SUB TOTAL AH

21.45

0.00

261.54

163.22

SECTION‐3 TOTAL AH

MIN. CAPACITY REQD. AT 27°C

=

98.33

AH

AHt2 = AHt1(1+(k(t2‐t1)/100))

BY APPLYING TEMP. CORRECTION FACTOR

=

122.91

AH

AHt1=

98.33

BY APPLYING AGING FACTOR

=

153.64

AH

k =

0.43

BY APPLYING DESIGN MARGIN

=

184.37

AH

t2 =

27

t1 =

8

BATTERY AH calculated

184

AH

BATTERY AH SELECTED /PROVIDED @ 27° C

200

AH

12 of 15

=

(As per IS:2651)

106.36

AH @ 8° C

(AS PER SPECIFICATION VOLUME IV OF V PAGE 57 OF 272)

98.33

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03



Worksheet ‐ 6

CALCULATION FOR QUANTITY OF CELLS Nominal Voltage Per Cell Nominal Battery Bank Voltage Float Voltage Per Cell End Cell Voltage Allowable System Voltage

Maximum No. of Cells

Minimum No. of Cells

= = = = = =

2.0 110 2.25 1.85 110 121.00

=

Volts DC Volts DC Volts DC Volts DC VDC, + 10% to ‐ 15% VDC to 93.50

VDC

Maximum System Voltage / Float Charging Voltage

=

121.00

=

53.78

=

/

2.25

Cells

Minimum System Voltage / End Cell Voltage /

1.85

Maximum Battery Voltage considering 55 cells and float voltage of 2.25 Volts

=

123.75

VDC

Minimum Battery Voltage considering 55 cells and End Cell Voltage of 1.85 Volts

=

101.75

VDC

No. of Cells selected

=

93.50

=

50.54

=

55

Permissible End Cell Voltage = (90% of 110V) / (Max No. of Cells) = Calculated ,No. of Cells in Battery Bank Selected No. of Cells in Battery Bank

13 of 15

cells

1.84

53.78

Nos.

55

Nos.

VDC

≈ Selected ECV of each Cell

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03


1.Overall Electrical Single Line Diagram For SS-1(DHC Tail End) (Drawing No.EL00001, Rev.-F ) 2.Technical Specification of Battery ,Battery Charger & DC Distribution Board Volume - IV of V Page-55 of 272 Section 2.3 Worksheet ‐7

BATTERY CHARGER SIZING INCOMING

: Voltage

:

415 ± 10%

Freqyency

:

50 ± 5%

:

110

OUTGOUING

Hz

:

Voltage

LOAD CYCLE

VAC

VDC

: Continious Load (A2)

:

7.52

Amps

for

599

Min

First Minute Load (A1)

:

24.01

Amps

for

1

Min

Last Minute Laod (A3)

:

25.70

Amps

for

1

Min

BATTERY CAPACITY : Cell selected

:

200

AH

Charging Duration

:

10

Hour

14 of 15

PROJECT

0

CLIENT

0

CONSULTANTS

0

CONTRACTOR

0

DOCUMENT TITLE


DOCUMENT NO.

EL00211 REV.- 03



CHARGER TYPE Float cum Trickle cum Boost Charger Design Margin‐20%

:

1.20


CHARGER RATING: A =

(DM x L1) +

(BIF x AH) (RT)

Where,

Therefore,

A

= Charger output current in ampere

DM

= Design Margin‐20%

=

1.20

L1

= Continuous DC Load Current

=

24

BIF

= Battery Inefficiency factor due to losses

=

1.1

AH

= Battery Ampere Hour Capacity

=

200

RT

B tt R h Ti = Battery Recharge Time

=

10

L1

=

L1

=

A

= Charger output current in ampere


(AS PER IEEE ‐ 946:1992)

[ DC load of Control, Indication and Annunciation Circuit in normal operation] + [ Momentary Closing & Tripping Load] + [ Float Charging Current of Battery]

24.41

Amps

HENCE, SELCTED RATING FOR THE BATTERY CHARGER

=

51.00

:

50

Amps

AMPS

BATTERY CHARGER SIZING CALCULATION FOR FLOAT CHARGER CONTINUOUS DC LOAD CURRENT (ICC)= DESIGN MARGIN (25% )=

= =

8 1.25

FLOAT CHARGING CURRENT(Itc)=

=

8.80

A (@ 160 mA per cellX 55 Nos. cells, as per Manufcaturer catalogue)

THE TOTAL REQUIRED CAPACITY OF THE FLOAT CHARGER IS CALCULATED AS: = ICC x 1.25 + ITC 8 = X 1.25 + 8.80 REQUIRED CAPACITY OF FLOAT CHARGER =

=

18.20

A

BATTERY CHARGER SIZING CALCULATION FOR BOOST CHARGER 110

DC NOMINAL VOLTAGE

=

BOOST CHARGING RATING

DESIGN MARGIN

= 20% OF Ah OF BATTERY = 0.2 X 200 = 40.0 A = 20%

BATTERY CHARGER RATING

=

48

V

A

BATTERY CHARGER RATING IS SELECTED FROM HIGHER OF FLOAT & BOOST CHARGING CURRENT, HENCE, CALCULATED CAPACITY OF BOOST CHRGER

48 Amps

SELECTED CAPACITY OF BOOST CHRGER = = 50 AMPS 2 NOS ,100% RATED FLOAT CUM BOOST CHARGER AS PER SPECIFICATION

15 of 15

269959985-Battery-Charger-Sizing-SS-1-Rev-03.pdf

Recommend Documents