Your Power Quality Partner UPS Battery Battery Sizing Paolo Frisoni Application Engineer, DPG Liebert Hiross UPS

Your Power Quality Partner

UPS BatteryUPS BatteryBattery SizingBattery SizingPaolo FrisoniApplication Engineer, DPG

Liebert Hiross UPS


Battery SizingBattery SizingBattery SizingBattery Sizing

Type of batteries used in DPG UPS Batteries for extended runtime How to assess backup times and size extra

batteries Special requirements (NiCd, 10 Years) Other requirements


Battery SizingBattery SizingBattery SizingBattery SizingBattery Used for micro UPS / On-Line

For GXT2-3000RT230 a 15 Amp. 72V Battery Charger (same look) is available its PN is: GXT2-1000RBC.072

Sup

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GX

T70

0

GX

T10

00

GX

T15

00

GX

T20

00

GX

T30

00

GX

T2-

700

GX

T2-

1000

RT

230

GX

T2-

1500

RT

230

GX

T2-

2000

RT

230

GX

T2-

3000

RT

230

GX

T2-

48V

BA

TT

GX

T2-

72V

BA

TT

DC BUS Voltage

[V]24 36 48 96 96 48 48 48 48 72 48 72

Ah 7 7 7 7 7 7 7 7 9 9 14 18Type of Battery

12V x 7-7,2Ah

Panasonic (7.2Ah) LC-R127R2CH1 CSB (7Ah) GP1270F2 YUASA (7Ah) NP7-12 (Term.C) FIAMM-GS FG 20722

2 3 4 8 8 4 4 4 8

12V x 9Ah

PANASONIC LC-R129CH1 PANASONIC UP-VW1245P1 FIAMM-GS FGH20902

4 6 12


Battery SizingBattery SizingBattery SizingBattery SizingBattery Used for micro UPS - Off Line

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PS

I 700

PS

I 100

0

PS

I 140

0

PS

I 220

0

PS

A35

0

PS

A47

0

PS

A70

0

PS

A35

0M

T-2

30

PS

A50

0M

T-2

30

PS

A65

0M

T-2

30

PS

A10

00M

T-2

30

PS

P30

0 (

*)

PS

P50

0 (*

)

PS

PX

T4

50 (

*)

PS

PX

T7

00

PS

PX

T1

250

Type of Battery

12V x 7-7,2Ah

Panasonic (7.2Ah) LC-R127R2CH1 CSB (7Ah) GP1270F2 YUASA (7Ah) NP7-12 (Term.C) FIAMM-GS FG 20722

2 3 4 1 1 1 2

12V x 4,5Ah

CSB GP1245F2 FIAMM-GS FGH20502

1

6V x 12Ah

PANASONIC LC-R0612CH1 YUASA NP12-6 (Term.C) FIAMM-GS FG 11202

8

12V x 12Ah

CSB GP12120F2 FIAMM-GS FG 21202

1 1

12V x 9Ah


1 1


Battery SizingBattery SizingBattery SizingBattery SizingBattery Used for small UPS

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GX

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1 6

kV

A

GX

T3x

1 8

kV

A

GX

T3x

1 1

0k

VA

GX

T24

0V

BA

TT

GX

T24

0V

LR

T

DC BUS Voltage [V]

120 120 384 384 384 240 240 240 240 240 240 240

Amp/H 9 90 7 38 65 7 14 7 14 14 14 40Type of Battery

12V x 7-7,2Ah

YUASA (7Ah) NP7-12 (Term.C) FIAMM-GS FG 20722 CSB (7Ah) GP1270F2 (Only for GXT) Panasonic (7.2Ah) LC-R127R2CH1 (Only fo GXT)

32 20 40 20 40 40 40

12V x 65Ah YUASA NP65-12

32

12V x 38Ah YUASA NP38-12

32

12V x 91Ah

POWER BATTERIES SLF-12105 10 YEAR (*)

10

12V x 9Ah


10

(*) INTERNAL BATTERY CHARGER 7 Amp


Battery SizingBattery SizingBattery SizingBattery Sizing Battery Used for Micro & Small UPS

– The most part of our products use : • Valve regulated lead-acid battery 5 Years of life

• Blocks of 12Volt (6 cell on each) with 7-7.2Ah

• The dimension are standard for different supplier but the terminals must be Fast-on 6,3 mm

– Hinet and its Batt.Cab. can be supplied without internal batteries. The internal Batt.Charger provide 1 - 3.5 -7Amp

– A complete Kit of Battery cable can be provided for the internal connections (HNBATTCABLE)

– The GXT 5&10kVA can be supplied without internal Batteries the PN is GXT5000T-230NB & GXT10000T-230NB with improved Battery Charger (4,5Amp)


Battery SizingBattery SizingBattery SizingBattery Sizing Battery Used for 10 Years Applications

– For special requirements like 10 Years Battery• for 12V 7Ah Blocks

– The NP7-12 (Yuasa) can be replaced with the RE7-12 the increasing cost is 70%

• for 12V 38Ah Blocks– The NP38-12 (Yuasa) can be replaced with NPL38-12

cost increase 15%

• for 12V 65Ah Block– The NP65-12 (Yuasa) can be replaced with NPL65-12

cost increase 15%


Battery SizingBattery SizingBattery SizingBattery SizingKey Factors in Battery Life

There are 4 factor that strongly affect the Battery Life Ambient Temperature Number of Charge/Discharge Cycles Deep discharge Floating Charge Voltage @ Temperature


Battery SizingBattery SizingBattery SizingBattery Sizing AMBIENT TEMPERATURE

Effect of the Temperature on Lifetime


Battery SizingBattery SizingBattery SizingBattery Sizing Number of Charge/Discharge Cycles

– Depend on number of Deep Discharge Cycles (%)– We will reach the DDL only when the Main fail last more than the UPS autonomy


Battery SizingBattery SizingBattery SizingBattery Sizing Deep Discharge

– The lowest recommended Voltage Under Load were the Battery can works or Cut off Voltage

– Below this limit Battery will be damagedDischarge Current

(C = Capacity) Final Discharge Voltage

(V/Cell) 0.1C or below 1.75

0.17C 1.7 0.26C 1.67 0.6C 1.6 3C 1.3

UPS Topology also lead to cycle on to battery operation frequently

OFF-LINE Worse

LINE INTERACTIVE Less Worse

ON-LINE Best Behaviour


Battery SizingBattery SizingBattery SizingBattery Sizing Deep Discharge

– Some UPS the Cut Off voltage can be adjusted, like Hinet (The default Value is 1.66 V/cell)

– Some others UPS this Limit change automatically with the load (all GXT series)

End Volt 1,85

1,85

1,75 1,75

1,67 1,67

100 90 80 70 60 50 40 30 20 10 0% Load


Battery SizingBattery SizingBattery SizingBattery Sizing Float Charge Voltage versus Temperature

– Float Charge Voltage need to be maintained between 2.275V/cell +/- 0.005 (at 20°C)– For Hinet is adjustable (factory set to 2.25 V)– For GXT is Fixed to 2.3V

– Optimisation will be reached when this value is adjusted with temperature :• at 0°C V/cell = 2,35V• at 40°C V/cell = 2,15V

• Hinet --> next step • Improvement


Design CriteriaDesign CriteriaDesign CriteriaDesign CriteriaRun Time Calculator

This Tool perform the calculation of Run Time of the UPS for a given:– Power of Load (kW)– Battery Capacity (Ah)

It work on Excel It is based on the Lead Acid Discharge Curves it optimise the calculation of autonomy time for the battery that

is considered working down to Deep Discharge limit for a given current

gives tested results



The Standard Capacity nominal value of a battery is for 20 Hours of discharge time to a final voltage of 1.75V per cell

The nominal capacity of a battery is reduced when is discharged at value of current that exceed the 20-Hour discharge rate

That means the real Capacity you can extract from the Battery is: k * C where is a reduction coefficient k < 1

How does the Calculator works: Input:

– Load Power (kW)– Battery Capacity (Ah)– Nominal Battery Voltage

Output :– the Run Time for the assigned Capacity (Ah)





It performs the calculation of the Battery Current:

96.0

1000

Vbatt

PIbatt

Then the Ratio of the Battery Current and the Battery Capacity

Ah

Ibatt

This value is Located On the Deep Discharge Characteristic this is a non linear passage , the K coefficient is so detected



Finally the Run time is calculated Like :

1000

60

P

VbattKAhTime

Estimation of the Autonomy time of the common UPS

Fill up following cells:

Battery voltage (nominal [Volts]): 384,000Load in kW (about 0.7*kVA): 16,000"Ah" of the battery ( ?7 ) : 14,400

This is the aut.time [min]: 5,944

Output



Accuracy

GXT Internal Deep. Disch. Char.


Battery SizingBattery SizingBattery SizingBattery Sizing Some Autonomy Data

PowerSure PSA 2 Autonomy Times

VA 350 500 650 1000Load % W 210 300 390 600

5 184 173 133 15110 134 86 77 9220 64 50 43 4630 38 38 27 2740 31 28 21 2250 22 21 15 1660 18 16 12 1270 14 13 9 1080 12 11 8 890 10 9 6 7

100 8 7 5 5

Approximate discharge times in minutes at 25° C for new ,

fully charged batteries, into a resistive load

PowerSure Interactive MT ModelsLoad in % PSI700 PSI1000 PSI1400 PSI2200

10% 109 114 120 10920% 67 69 73 6030% 42 43 40 3840% 31 33 28 2950% 19 20 16 2060% 17 17 13 1770% 14 14 10 1380% 11 12 9 1090% 9 10 8 9

100% 8 8 7 5

PowerSure Interactive RM ModelsLoad in % PSI700 PSI1000 PSI1400 PSI2200

10% 109 114 120 10920% 67 69 73 6030% 42 43 40 3840% 31 33 28 2950% 19 19 16 1260% 17 17 13 1770% 14 14 10 1380% 11 12 9 1090% 9 10 8 9

100% 7 7 7 5

Approximate discharge times in minutes at 25° C for new ,



UPStation-GXT 2 with internal batteryLoad in % 700VA 1000VA 1500VA 2000VA 3000VA

10% 248 191 144 56 9120% 115 87 83 33 4630% 79 48 42 26 3040% 58 34 28 19 2150% 44 25 20 14 1660% 35 19 15 12 1170% 29 16 12 10 980% 24 13 10 8 890% 20 12 8 7 7

100% 17 11 7 6 5

UPStation-GXT 2 with internal battery + 1 external battery cabinetLoad in % 700VA 1000VA 1500VA 2000VA 3000VA

10% 992 764 576 168 36420% 460 348 332 99 18430% 316 192 168 78 12040% 232 136 112 57 8450% 176 100 80 42 6460% 140 76 60 36 4470% 116 64 48 30 3680% 96 52 40 24 3290% 80 48 32 21 28

100% 68 44 28 18 20

UPStation-GXT 2 with internal battery + 2 external battery cabinetsLoad in % 700VA 1000VA 1500VA 2000VA 3000VA

10% 1984 1528 1152 392 72820% 920 696 664 231 36830% 632 384 336 182 24040% 464 272 224 133 16850% 352 200 169 98 12860% 280 152 120 84 8870% 232 128 96 70 7280% 192 104 80 56 6490% 160 96 64 49 56

100% 136 88 56 42 40


10% 2976 2292 1728 560 109220% 1380 1044 996 330 55230% 948 576 504 260 36040% 696 408 336 190 25250% 528 300 240 140 19260% 420 228 180 120 13270% 348 192 144 100 10880% 288 156 120 80 9690% 240 144 96 70 84

100% 204 132 84 60 60


10% 3968 3056 2304 840 145620% 1840 1392 1328 495 73630% 1264 768 672 390 48040% 928 544 448 285 33650% 704 400 320 210 25660% 560 304 240 180 17670% 464 256 192 150 14480% 384 208 160 120 12890% 320 192 128 105 112

100% 272 176 112 90 80



UPStation GXT 6 and 10kVAApproximate discharge times in minutes at 25° C for new , fully charged batteries, into a resistive load

GXT 6,8,10 KVA with internal Batteries

20x7Ah, 12V 2x20x 7Ah, 12V 2x20x 7Ah, 12V

Percentage Load VA / W minutes Load VA / W minutes Load VA / W minutes10% 600/420 69 800/560 180 1000/700 15020% 1200/840 58 1600/1120 122 2000/1400 8030% 1800/1260 48 2400/1680 70 3000/2100 5440% 2400/1680 33 3200/2240 49 4000/2800 3750% 3000/2100 23 4000/2800 37 5000/3500 2760% 36002520 17 4800/3360 28 6000/4200 2270% 4200/2940 14 5600/3920 24 7000/4900 1880% 4800/3360 11 6400/4480 20 8000/5600 1590% 54003780 9 7200/5040 17 9000/6300 13100% 6000/4200 8 8000/5600 15 10000/7000 11

GXT 6,8,10 KVA with Internal Batteries and 1 x GXT240VBATT Cabinet

20x7Ah, 12V 2x20x 7Ah, 12V 2x20x 7Ah, 12V 2x20x 7Ah, 12V 2x20x 7Ah, 12V 2x20x 7Ah, 12V


GXT6000 + 1 x GXT240VBATT GXT8000 (3x1) + 1 x GXT240VBATT GXT10000 + 1 x GXT240VBATT

GXT6000 GXT8000 (only 3x1) GXT10000


Battery SizingBattery SizingBattery SizingBattery Sizing Some Autonomy Data for GXT + 2x 240VBATT Batt.Cab.

GXT 6,8,10 KVA with Internal Batteries and 2 x GXT240VBATT Cabinet



GXT6000 + 2 x GXT240VBATT GXT8000 (3x1) + 2 x GXT240VBATT GXT10000 + 2 x GXT240VBATT


Battery SizingBattery SizingBattery SizingBattery Sizing Some Autonomy Data for GXT + 240VLRT Batt.Cab.

GXT 8,10 KVA with Internal Batteries and 1 x GXT240VLRT Cabinet

20x7Ah, 12V 20x 40Ah, 12V 2x20x 7Ah, 12V 20x 40Ah, 12V 2x20x 7Ah, 12V 20x 40Ah, 12V

Percentage Load VA / W minutes Load VA / W minutes Load VA / W minutes10% 600/420 800/560 600 1000/700 48020% 1200/840 1600/1120 425 2000/1400 39030% 1800/1260 2400/1680 370 3000/2100 28840% 2400/1680 3200/2240 267 4000/2800 20050% 3000/2100 4000/2800 200 5000/3500 15860% 36002520 4800/3360 166 6000/4200 12770% 4200/2940 5600/3920 138 7000/4900 10580% 4800/3360 6400/4480 117 8000/5600 8590% 54003780 7200/5040 101 9000/6300 70100% 6000/4200 8000/5600 85 10000/7000 60

GXT 8,10 KVA with Internal Batteries and 2 x GXT240VLRT Cabinet


Percentage Load VA / W minutes Load VA / W minutes Load VA / W minutes10% 600/420 800/560 960 1000/700 90020% 1200/840 1600/1120 780 2000/1400 73030% 1800/1260 2400/1680 690 3000/2100 54340% 2400/1680 3200/2240 520 4000/2800 39350% 3000/2100 4000/2800 450 5000/3500 30460% 36002520 4800/3360 340 6000/4200 24470% 4200/2940 5600/3920 265 7000/4900 20380% 4800/3360 6400/4480 225 8000/5600 17490% 54003780 7200/5040 196 9000/6300 152100% 6000/4200 8000/5600 190 10000/7000 133

GXT6000 + 2 x GXT240VLRT GXT8000 (3x1) + 2 x GXT240VLRT GXT10000 + 2 x GXT240VLRT

GXT6000 + 1 x GXT240VLRT GXT8000 (3x1) + 1 x GXT240VLRT GXT10000 + 1 x GXT240VLRT

NOT APPLICABLE

NOT APPLICABLE


Battery SizingBattery SizingBattery SizingBattery Sizing GXT6000 (1x1 & 3x1) can be extended with the limitation

of two Cabinet 240VBATT max - for Thermal reason

GXT8000 3X1 & GXT10000 (1x1 & 3x1) can be extended either with Cabinet 240VBATT and Cabinet 240VLRT

The max numbers of Cabinets depend by the allowed recharging time ( the Batt. Charger rating is 1.5Amp)

If more than two Cabinets 240VLRT are necessary then is recommended to use the GXT5000T-230NB & GXT10000T-230NB with improved Battery Charger (4,5Amp) . But they are not CE certified


Battery SizingBattery SizingBattery SizingBattery Sizing Some Autonomy Data for Hinet with Batt.Cab.

HINET 10-30kVA Autonomy TimesApproximate discharge times in minutes at 25° C for new , fully charged batteries, into a resistive load

HINET Backup timesLoad Power 1 2 3 410kVA 8kW minutes --> 6 17 28 4115kVA 12kW minutes --> 9 17 2420kVA 16kW minutes --> 6 11 1730kVA 24kW minutes --> 6 9Note: External Battery Cabinets autonomy does not include internal batteries.Please note: for long autonomy times, data are approximate ± 5%

LOAD 10kVA 15kVA 20kVA 30kVA 10kVA 15kVA 20kVA 30kVA8kW 12kW 16kW 24kW 8kW 12kW 16kW 24kW

% [min] [min] [min] [min] [min] [min] [min] [min]100% 65 38 25 15 131 78 52 3090% 75 43 29 17 150 90 60 3580% 88 51 34 20 172 105 72 4170% 105 61 41 24 200 124 86 4960% 127 75 51 29 239 149 105 6050% 158 96 65 38 298 185 131 7840% 205 127 88 51 387 239 172 10530% 290 179 127 75 536 338 239 14920% 463 290 205 127 832 535 388 23910% 982 636 463 290 1721 1128 832 536

Internal Battery Strings

38Ah 65Ah


Battery SizingBattery SizingBattery SizingBattery Sizing Ni-Cd Battery

– Some application require high life despite of the price (Very High Price !!)

– The Voltage/Cell for Ni-Cd Batt. change like this:• 1,4 V/el in Floating• 1,07 V/el in end of Discharge

– If you have an UPS design with Lead Acid Battery to switch with Ni-Cd is necessary to increase the Number of Cells in the same ratio as the V/el• For instance Hinet requires 192 Cells in Pb and for Ni-Cd

192* (2,25/1,4) = 308 Ni-Cd Cells


Battery SizingBattery SizingBattery SizingBattery Sizing Ni-Cd Battery

– The Low Battery Limit must be adjusted in the same way • 308* 1,07 = 329 Volt

– Hinet allow to easily adjust these limits so it’s open to be supplied with Ni-Cd Batteries.

– The recharge current for Ni-Cd Battery must be well regulated

– The Hinet Battery charger feed a constant current that can be 1- 3.5 - 7 Amp up to Floating Point were the Float voltage will be held Fixed.•


Nfinity Extended Batt. CabinetNfinity Extended Batt. CabinetNfinity Extended Batt. CabinetNfinity Extended Batt. Cabinet This Cabinet Allow to use the same Intelligent Battery

Module of Nfinity frame– P/N is N900Exx00000

It is a Matching Cabinet Need two Intellislot Battery Card (IBC),

– 1on Nfinity, 1 on the Cabinet + serial cable for communication

– 2 shipped with each Extended Battery Cabinet The DC Power connection cable

– P/Ns: NPNPEXTBC3, NPNPEXTBC15• These include specially designed connectors

In the UPS configuration Menu select :• Change Settings (press <Return>)• Intellislot Battery Cabinet (press <Return>)• enter the quantity of extended Battery Cabinet installed• press Return and ESC


Nfinity External Batt. CabinetNfinity External Batt. CabinetNfinity External Batt. CabinetNfinity External Batt. Cabinet Can 10 years batteries be used?

– Not inside the main UPS Frame• Only 5 years Battery Modules are designed for Nfinity

UPS

– By using the External Battery Cabinet:• New version has same front bezels as Nfinity• Cabinet type: CZ1 Size 90Ah/120V with Battery Charger • Batteries Used are Power Batteries SLF12105• Note the difference between:

External Battery Cabinet and Extended Battery Cabinet• External BC is not an “Intelligent” backed up Battery

– does not use Nfinity Battery Modules– the Battery Module will not disconnect from the others

when a failure is detected


Battery SizingBattery SizingBattery SizingBattery Sizing

EXTERNAL BATTERY CABINET CZ1 the Old and New one


Battery SizingBattery SizingBattery SizingBattery Sizing Where is the Battery charger ?

– located in the Power Module – the charger has a temperature compensation with

a current limited to 3,2A– Others functions of the Power Module are:

• Power Factor Correction Circuit working with PWM at 20kHz.

• Input Power Factor close to 0,99 (see following slide)• Output Inverter • Starting from version G3 (mid-2002) :Able to accept three phase and single phase input line• Older G2 modules cannot be fitted in new 3x1 frames


Thank you for your Thank you for your attentionattentionFor more questions contact:Product Support Desk on

http://my.liebert-hiross.com

Documents

Your Power Quality Partner UPS Battery Battery Sizing Paolo Frisoni Application Engineer, DPG Liebert Hiross UPS