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Bat sizing rev 1.3
1
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BatteryBattery
SizingSizing
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List of contentsList of contents
Head linesHead lines
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Battery load...Battery load...
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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UPS inverter
Battery load
Calculate the battery load...Calculate the battery load...
Pbat
+-
D C
A C
UPS load = Pout
Pbat = the battery load powerPout = the output load power
Inv. = the inverter efficiency
PF = The power factor
What is the required battery load - for a given UPS load…?
*
PBat = Pout x PF / Inverter
From kVA to kWCal. the Battery load
Cal
cula
tin
g
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What is the total battery load (kW)…?
Battery load
Battery load - example...Battery load - example...
Pbat
+-
PBat = Pout x PF / Inverter
PBat = 56 x 0,8 / 0,95 = 47,2 kW
Example:
UPS load/ Pout……..…………....56kVA
UPS load, PF…………………......0,8
UPS inverter efficiency………....95% or 0,95
You need to know...You need to know...
*
Battery load
Total load is the three phase loads added together
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Ncell = Number of battery cells to be used
Vlow = The lowest DC voltage
(before inverter shut down will take place)
Inv. = The inverter efficiency with the actual load.
Ich-max = The max. battery charging current.
Parameters...Parameters...
For the most used battery type - the lead acid - the following parameters are used:
For a specific Silcon DP300E type and an actual output load,the above data can be found in the Quick Reference Manual, section “DC Data”.
Battery load
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Battery Bank...Battery Bank...
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Battery bank
Battery cells and blocks...Battery cells and blocks...
+ -
+ -
+ -
1 x 2 volt = 2 V
- battery cell
3 x 2 volt = 6 V
- battery block
6 x 2 volt = 12V
- battery block
*
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Battery bank
Battery string...Battery string...
Serial connected battery blocks - forms a battery string.
More strings can be connected in parallel - to increase the battery bank capacity.
- - -+ + +
- - -+ + +
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Battery pack for DP300E...Battery pack for DP300E...
How to make a battery pack for DP300E…?
2 x192 battery cells = 2 x 384 VDC2 x192 battery cells = 2 x 384 VDC
2 x 32 battery blocks of 12V = 2 x (32 x 12 V) = 2 x 384 VDC2 x 32 battery blocks of 12V = 2 x (32 x 12 V) = 2 x 384 VDC
Battery bank
12 V12 V- - -+ + +12 V12 V
- - -+ + +12 V12 V
32 blocks of 12V
32 blocks of 12V
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Cell Specification... Cell Specification...
+ -
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Cell specifications
Cell LOAD... Cell LOAD... Actual Cell LOAD / Matching Battery SizeActual Cell LOAD / Matching Battery Size
Calculating the watt/ cell capacity…?
Cell load = Total battery load / Number of cells
Example1: 47.200W / (2 x 192 cells) = 123 W/cell
During battery operation the load on the battery bank is supposed to be constant at the max. specified load…
*
Watt+ -
Example 1:
PBat = Pout x PF / Inverter
PBat = 56 x 0,8 / 0,95 = 47,2 kW
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Lowest cell voltage...Lowest cell voltage...
The lowest battery voltage - “when the back-up time expires”
- is defined from the battery spec. and programmed into the UPS
Cell-end voltage - and how to find it…?
Example 1:
Vcell low = 2X326V / 2X192 cells =
1,7V/cell
Vcell low = VInverter low / number of cellsCell voltage
Time
Cell specifications
1,7 V
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Example 2...Example 2...
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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A customer want to protect a 3x400V computer load…- with an 10min.
UPS Back-up time
The highest phase current is determine the Silcon DP300E size.Silcon DP380E has a 400V full load output current at 3 x 115A and is therefore sufficient for IL2
Choice: Silcon DP380E
Example 2 Example 2
Result from measuring- full load current on the 3 phases...
IL1 100A PF 0,8
IL2 112A PF 0,9
IL3 105A PF 0,8
- example 2
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Calculating the total power...
Line to line voltage……...400V
Line to neutral voltage….230V
PL1 = 230 x 100 x 0,8 = 18.400W
PL2 = 230 x 112 x 0,9 = 23.184W
PL3 = 230 x 105 x 0,8 = 19.320W
Total =
60.904W
- or close to 61kWPBatt = 61 / 0,94 = 64.890 W from 384 cells
Pcell = 64.890 / 384 = 169W/cell VLow = 2 x 326 / 384 = 1,7V/cell
Example 2 Example 2 - calculating cell load- calculating cell load
- and lowest cell voltage - and lowest cell voltage
Required data...
Silcon DP380E max load…..…80kW
Actual load……………………..61 kW
Load percentage………………75%
Inverter efficiency:
Linear load……………….…….96%
SMPS load……………….…….94%
- example 2
Example 2 - Load spec.Voltage 3x400V
IL1 100A PF 0,8
IL2 112A PF 0,9
IL3 105A PF 0,8Back-up time 10 min.
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Type UPS12-140: Capacity……….174W/cell Back-up time…..10 min. End point cell voltage……1,7V
Example 2Example 2- choosing battery- choosing battery
Min.Min.TypeType 5 10 15 20
UPS12-140 254 174 137 111
UPS12-170 272 204 165 136
UPS12-200 360 200
Data sheet example: JOHNSONS CONTROL
- fits the demand of 169 W/cell.
- example 2
Example 2 - Load spec.Voltage 3x400V
IL1 100A PF 0,8
IL2 112A PF 0,9
IL3 105A PF 0,8Back-up time 10 min.
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UPS specificationsUPS specifications concerning batteries...concerning batteries...
Common Data from Quick reference:
Nominal voltage 2x384V Number of battery cells 2x192 pcs. Charging window float 2x(410V - 460V) Factory setting:
2x438V Charging window boost 2x(438V - 460V) Factory setting:
2x438V Low bat. warning window 2x(336V - 384V) Factory
setting: 2x346V Low bat. shut down window 2x(316V - 336V) Factory
setting: 2x326V
- example 2
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Battery ambient temperatureBattery ambient temperature
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Battery…Battery…Capacity and life timeCapacity and life time
°C
20
21
22
23
24
25
Typ. battery specification temperature
26
27
28
29
30Ambient temperature - Battery capacity…General rule:
- if ambient temp. is lowered from 25 °C to 20 °C- The battery must be 4% oversized
Ambient temperature - Battery life time…
General rule:- if ambient temp. increases 10 °C - The battery life time will be halved.
But temperature compensated charging voltage - as in the Silcon DP300E series- reduces the influence to the half. +
4% oversized
+ -
Battery amb. temperature
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Battery life time...Battery life time...
High temperature
Poor charge control
80%100% Capacity
The capacity of the battery falls with the age.
The point where 80% is left is often used to define the life time.
20% oversizing is required for the W/cell if not included from manufacture
Ageing
End of life time
Battery amb. temperature
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Battery rechargingBattery recharging
2 4 6 8
0
10 hours
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Battery recharging
DP300E rechargingDP300E recharging normal capacity on batteries...normal capacity on batteries...
2 4 6 8
0
10 hours
0
1 hour
Back-up time is often specified less than 1 hour
Normal charging current
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The following broad rule can be used for batteries wherealmost all the energy is taken out
- this is the case with back-up times of 2-3 hours or more:
FOR RECHARGE TIMES IN THE AREA OF 4 - 6 HOURS: - it last t hours to recharge the battery to 80% capacity,3xt to reach 90% and 8xt to reach 100%
FOR RECHARGE TIMES IN THE AREA OF 10 - 12 HOURS:
- it last 2xt to reach 90% and 4xt to reach 100%
But how to find t...?But how to find t...?
General rule about recharging...General rule about recharging...
Battery recharging
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Recharging general rule ...Recharging general rule ...
FOR RECHARGE TIMES IN THE AREA OF 4 - 6 HOURS:
1 x t 3 x t 8 x t
1009080
Battery recharging
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The following can be assumed:
We have to put the same energy back into the battery as taken out + the losses arising by rechargingThe losses by recharging are about 10%...
The Silcon DP300E will recharge with max. charging current, at least until 80% of the energy has been restored
The battery cells has a average voltage of 2V
Pbat
+ -Pbat outPbat in
100% 90%
Battery losses...Battery losses...
Battery recharging
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If 4 hours back-up time is required...
- it will take a week to reach
the 100 % battery capacity level
by too low charging current
One week...
One week charging …?One week charging …?
Battery recharging
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Example: DP310E output load 8kW (3-phase) Back-up time 4 hours Max. 12 hours recharge time to 90% required.
Let´s take an example...Let´s take an example...
Energy taken from battery during battery operation:Output load/DP310E bat.opr.efficiency = 8/0,9=8,9kWDischarge current=8900W/(2Vx384) cells=11,6AEnergy used 11,6x4 hours=46,4AH
Energy to be recharged=46,4/0,9=51,5AH
If 90% is to be restored within 12 hours, 80% has to takeplace within 12/2=6 hours.
Battery recharging
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If 51,5AH has to be restored within 6 hours…the charging current must be 51,5/ 6 = 8,6AThis gives a required charging power of 384 x 2 x 8,6 = 6,6 kWAs the standard DP300E has a charging capacity equal to 10% of the output power - The DP380E has to be used
But as the standard programming of the DP300E can be changed into a special setting - giving the double charging capacity
With a corresponding reduction of the max. output power - a DP340E can be used
8kW is then available for charging
A max. output load of 36kW is more than enough for the actual 8kW load.
A separate charger might be a better economic solution
Let´s take an example...Let´s take an example...
Battery recharging
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Battery parallel connection...Battery parallel connection...
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Parallel stringsParallel strings
Numbers of blocks, depends on type of battery pack and parallel strings.
The battery type UPS12 have 6 cells of 2 volt and the UPS6 have 3 cells of 2 volt
If the W/cell is above numbers in table it is necessary to make parallel strings
Cellload [W/ cell] With ___ parallel string = = = _____ [W/ cell] Number of strings
The numbers of cells in the Silcon DP300E series is...
2 x 192 pcs. = total 384 cells.
- therefor divide the total 384 with the number of battery cells
UPS12 = 384 : 6 = 64 battery block
UPS 6 = 384 : 3 = 128 battery block
And then multiply this with the number of strings
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Example 3...Example 3...
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Example 3 Example 3 Specify the battery...Specify the battery...
Example 3
UPS type: DP3120E Total load: 110 kVA PF: 0,8 SMPS Requested back-up: 20 min
Specify the battery…!
Data:
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Example 3 Example 3 Specify the battery...Specify the battery...
Transfer output power to kW´s, if information is in kVA or Amps…
PTotal W 88.000% load on UPS = x 100 = x 100 = 73,3
[%] UPS1/1 load W 120.000
PTotal W = PTotal VA x PF = 110.000 [VA] x 0,8 = 88.000 [W]
Calculate the percentage of the load compared with the capacity of the UPS...
Example 3
Example 3 - Battery…?.
UPS type DP3120E
Total load 110 kVA
PF 0,8 SMPS
Back-up time 20 min.
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Inverter DataInverter Data
25% 50% 75% 100% 25% 50% 75% 100%DP310E 88,8% 92,6% 93,0% 93,5% 85,5% 89,0% 89,5% 90,0%DP320E 89,3% 93,1% 93,5% 94,0% 86,0% 89,3% 90,0% 90,5%DP340E 91,0% 94,0% 94,5% 94,5% 88,0% 90,1% 91,7% 92,3%DP360E 93,0% 94,5% 95,5% 96,0% 89,0% 92,0% 92,8% 93,2%DP380E 93,2% 95,5% 96,0% 96,1% 90,0% 92,8% 93,2% 93,5%DP3120E 88,6% 93,0% 94,2% 94,6% 89,7% 92,5% 92,9% 93,2%DP3160E 91,2% 93,9% 94,6% 94,7% 90,0% 92,8% 93,2% 93,5%DP3240E 90,0% 94,2% 95,2% 95,4% 88,5% 92,0% 93,0% 93,2%DP3320E 92,2% 95,0% 95,4% 95,5% 90,0% 92,8% 93,2% 93,5%DP3480E 91,7% 94,5% 94,8% 95,0% 90,0% 92,8% 93,2% 93,5%
Linear Load SMPS Load Load DP
Efficiencies DC to AC DP 3120 E and 73,3 % SMPS loaded
Find the efficiencies DC to AC percentage..!
Example 3
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Example 3 Example 3 Specify the battery...Specify the battery...
Calculate the battery load and the cell load
- decide if parallel strings is needed...
BatteryLoad [W] 94.725Cell load = = = 247 [W/ cell]
Number of cells 2 x 192
PTotal [W] 88000Battery load = 100 = x 100 = 94.725 [W]
Inv. eff. [%] 92,9
Cell load:
Battery Load:
Efficiencies DC to AC (table)= 73,3 % (SMPS-% load of the UPS) = 92,9 inv. Eff %.
Example 3
Example 3 - Battery…?.
UPS type DP3120E
Total load 110 kVA
PF 0,8 SMPS
Back-up time 20 min.
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Example 3 Example 3 Specify the battery...Specify the battery...
Find the necessary battery type, table Johnson battery.
247 [W/cell] in 20 min...
Min.Min.TypeType 5 10 15 20 30 40 50 60 90
UPS12-140 254 174 137 111 82 54 53 46
UPS12-170 272 204 165 136 105 86,6 74,4 65 46,7
UPS12-200 360 251 200 167 124 100 73 53
UPS12-270 457 336 263 218 163 132 111 94
UPS12-310 560 400 304 248 184 150 125 108
UPS12-370 610 450 355 293 219 171 142 123
UPS12-475 725 555 460 375 302 245 205 178
UPS6-620 890 720 600 520 405 332 280 243 170
Example 3
Example 3 - Battery…?.
UPS type DP3120E
Total load 110 kVA
PF 0,8 SMPS
Back-up time 20 min.
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Battery pack Battery pack specifications...specifications...
Find the weight and dimension of the battery pack
MODELWATT/CELL15 Min./167
V/C
LENGTH
IN (MM)
WIDTH
IN (MM)
HEIGHT
IN (MM)
WEIGHT
LBS. (KGS)
UPS12-140 140 7.78 (197) 5.22 (132)) 7.26 (184) 27 (12)
UPS12-170 170 8.99 (228)) 5.47 (139) 8.74 (222) 40 (18)
UPS12-270 270 10.30 (261) 6.83 (173) 8.74 (222) 57 (26)
UPS12-310 310 12.08 (307) 6.87 (174)) 9.51 (241) 66 (30)
UPS12-370 370 13.51 (343) 6.76 (172) 9.48 (240) 75 (34)
UPS12-475 475 13.57 (344) 6.76 (172) 10.93 (276) 105 (48)
UPS12-520 620 12.65 (321) 7.00 (177) 10.21 (259) 72 (33)
Example 3
Example 3 - Battery…?.
UPS type DP3120E
Total load 110 kVA
PF 0,8 SMPS
Back-up time 20 min.
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Example 3 Example 3 Specify the battery...Specify the battery...
Battery Specification/Pack
Type UPS 12 - 310
Make Johnson
Number of cells 384
Cell load 247 W/cell
Min. cell voltage 1,7 V
Back-up time 20 min.
Number of blocks 64
Block dim. (HxWxL) 241x174x307 mm
Total weight 1920 kg
Solution...
Example 3
Example 3 - Battery…?.
UPS type DP3120E
Total load 110 kVA
PF 0,8 SMPS
Back-up time 20 min.
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Your turn...
Now - your turn...
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Task 1Task 1
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Task 1Task 1Specify the battery...Specify the battery...
UPS type: DP380E Total load: 66 kW PF load: 1 Requested back-up: 10 min
Specify the battery…!
Data:
Task 1
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Task 1Task 1
PTotal W 66.000% load on UPS = x 100 = x 100 = 82,5
[%] UPS1/1 load W 80.000
PTotal W = PL1 + PL2 + PL3 = 66.000 [W]
Total Load:
UPS load:
Task 1 UPS type: DP380E Total load: 66 kW PF load: 1 Back-up time: 10 min
Task 1
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Inverter DataInverter Data
Find the efficiencies DC to AC percentage..!
25% 50% 75% 100% 25% 50% 75% 100%DP310E 88,8% 92,6% 93,0% 93,5% 85,5% 89,0% 89,5% 90,0%DP320E 89,3% 93,1% 93,5% 94,0% 86,0% 89,3% 90,0% 90,5%DP340E 91,0% 94,0% 94,5% 94,5% 88,0% 90,1% 91,7% 92,3%DP360E 93,0% 94,5% 95,5% 96,0% 89,0% 92,0% 92,8% 93,2%DP380E 93,2% 95,5% 96,0% 96,1% 90,0% 92,8% 93,2% 93,5%DP3120E 88,6% 93,0% 94,2% 94,6% 89,7% 92,5% 92,9% 93,2%DP3160E 91,2% 93,9% 94,6% 94,7% 90,0% 92,8% 93,2% 93,5%DP3240E 90,0% 94,2% 95,2% 95,4% 88,5% 92,0% 93,0% 93,2%DP3320E 92,2% 95,0% 95,4% 95,5% 90,0% 92,8% 93,2% 93,5%DP3480E 91,7% 94,5% 94,8% 95,0% 90,0% 92,8% 93,2% 93,5%
Linear Load SMPS Load Load DP
Efficiencies DC to AC DP 380E and 82,5% Linear
Task 1 UPS type: DP380E Total load: 66 kW PF load: 1 Back-up time: 10 min
Task 1
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Task 1Task 1
Calculate the battery load and the cell load
- decide if parallel strings is needed...
BatteryLoad [W] 68.750Cell load = = = 179 [W/ cell]
Number of cells 2 x 192
PTotal [W] 66.000Battery load = 100 = x 100 = 68.750 [W]
Inv. eff. [%] 96
Cell load:
Battery Load:
Efficiencies DC to AC (table)= 73,3 % (linear-% load of the UPS) = 96 inv. Eff %.
Task 1 UPS type: DP380E Total load: 66 kW PF load: 1 Back-up time: 10 min
Task 1
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Results of task 1Results of task 1
Battery Specification/Pack
Type UPS 12 - 170
Make Johnson
Number of cells 384
Cell load 179 W/cell
Min. cell voltage 1,7 V
Back-up time 10 min.
Number of blocks 64
Block dim. (HxWxL) 222 x 139 x 228mm
Total weight 1152 kg
Results...
Task 1 UPS type: DP380E Total load: 66 kW PF load: 1 Back-up time: 10 min
Task 1
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Task 2Task 2
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Task 2Task 2Specify the battery...Specify the battery...
UPS type: DP3160E Total load L1: 50 kVA, PF 0,9 SMPS Total load L2: 40 kVA, PF 0,8 SMPS Total load L3: 45 kVA, PF 0,8 SMPS Back-up time: 15 min
Specify the battery…!
Data:
Task 2
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Task 2Task 2
PTotal W 113.000% load on UPS = x 100 = x 100 = 70,6
[%] UPS1/1 load W 160.000
PL1 = PL1 x PF1 = 50kVA x 0,9 = 45.000 [W]PL2 = PL2 x PF1 = 40kVA x 0,8 = 32.000 [W]PL3 = PL3 x PF1 = 45kVA x 0,8 = 36.000 [W]
PTotal W = PL1 + PL2 + PL3 = 113.000 [W]
Total Load:
UPS load:
Task 2 UPS type: DP3160E Total load L1: 50 kVA, PF 0,9 SMPS Total load L2: 40 kVA, PF 0,8 SMPS Total load L3: 45 kVA, PF 0,8 SMPS Back-up time: 15 min
Task 2
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Inverter DataInverter Data
Find the efficiencies DC to AC percentage..!
Efficiencies DC to AC DP 3160E and 70,6% SMPS
25% 50% 75% 100% 25% 50% 75% 100%DP310E 88,8% 92,6% 93,0% 93,5% 85,5% 89,0% 89,5% 90,0%DP320E 89,3% 93,1% 93,5% 94,0% 86,0% 89,3% 90,0% 90,5%DP340E 91,0% 94,0% 94,5% 94,5% 88,0% 90,1% 91,7% 92,3%DP360E 93,0% 94,5% 95,5% 96,0% 89,0% 92,0% 92,8% 93,2%DP380E 93,2% 95,5% 96,0% 96,1% 90,0% 92,8% 93,2% 93,5%DP3120E 88,6% 93,0% 94,2% 94,6% 89,7% 92,5% 92,9% 93,2%DP3160E 91,2% 93,9% 94,6% 94,7% 90,0% 92,8% 93,2% 93,5%DP3240E 90,0% 94,2% 95,2% 95,4% 88,5% 92,0% 93,0% 93,2%DP3320E 92,2% 95,0% 95,4% 95,5% 90,0% 92,8% 93,2% 93,5%DP3480E 91,7% 94,5% 94,8% 95,0% 90,0% 92,8% 93,2% 93,5%
Linear Load SMPS Load Load DP
Task 2 UPS type: DP3160E Total load L1: 50 kVA, PF 0,9 SMPS Total load L2: 40 kVA, PF 0,8 SMPS Total load L3: 45 kVA, PF 0,8 SMPS Back-up time: 15 min
Task 2
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Task 2Task 2
BatteryLoad [W] 121.505Cell load = = = 317 [W/ cell]
Number of cells 2 x 192
PTotal [W] 113.000Battery load = 100 = x 100 = 121.505[W]
Inv. eff. [%] 93
Cell load:
Battery Load:
Efficiencies DC to AC (table)= 70,6 % (SMPS-% load of the UPS) = 93 inv. Eff %.
Task 2 UPS type: DP3160E Total load L1: 50 kVA, PF 0,9 SMPS Total load L2: 40 kVA, PF 0,8 SMPS Total load L3: 45 kVA, PF 0,8 SMPS Back-up time: 15 min
Task 2
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Results of task 2Results of task 2
Battery Specification/Pack
Type UPS 12 - 370
Make Johnson
Number of cells 384
Cell load 317 W/cell
Min. cell voltage 1,7 V
Back-up time 15 min.
Number of blocks 64
Block dim. (HxWxL) 240 x 172 x 343mm
Total weight 2176 kg
Results...
Task 2 UPS type: DP3160E Total load L1: 50 kVA, PF 0,9 SMPS Total load L2: 40 kVA, PF 0,8 SMPS Total load L3: 45 kVA, PF 0,8 SMPS Back-up time: 15 min
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Task 3Task 3
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection
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Task 3Task 3Specify the battery...Specify the battery...
UPS type: DP3320E Total load: 315 kVA PF load: 0,8 Requested back-up: 20 min
Specify the battery…!
Data:
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Task 3Task 3
PTotal W 252.000% load on UPS = x 100 = x 100 = 78,8
[%] UPS1/1 load W 320.000
Total Load:
UPS load:
Task 3 UPS type: DP3320E Total load: 315 kW PF load: 0,8 Back-up time: 20 min
PTotal W = PTotal VA x PF = 315.000 x 0,8 = 252.000 [W]
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Inverter DataInverter Data
Find the efficiencies DC to AC percentage..!
25% 50% 75% 100% 25% 50% 75% 100%DP310E 88,8% 92,6% 93,0% 93,5% 85,5% 89,0% 89,5% 90,0%DP320E 89,3% 93,1% 93,5% 94,0% 86,0% 89,3% 90,0% 90,5%DP340E 91,0% 94,0% 94,5% 94,5% 88,0% 90,1% 91,7% 92,3%DP360E 93,0% 94,5% 95,5% 96,0% 89,0% 92,0% 92,8% 93,2%DP380E 93,2% 95,5% 96,0% 96,1% 90,0% 92,8% 93,2% 93,5%DP3120E 88,6% 93,0% 94,2% 94,6% 89,7% 92,5% 92,9% 93,2%DP3160E 91,2% 93,9% 94,6% 94,7% 90,0% 92,8% 93,2% 93,5%DP3240E 90,0% 94,2% 95,2% 95,4% 88,5% 92,0% 93,0% 93,2%DP3320E 92,2% 95,0% 95,4% 95,5% 90,0% 92,8% 93,2% 93,5%DP3480E 91,7% 94,5% 94,8% 95,0% 90,0% 92,8% 93,2% 93,5%
Linear Load SMPS Load Load DP
Efficiencies DC to AC DP 3320E and 78,8% Linear
Task 3 UPS type: DP3320E Total load: 315 kW PF load: 0,8 Back-up time: 20 min
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Task 3Task 3
BatteryLoad [W] 264.151Cell load = = = 688 [W/ cell]
Number of cells 2 x 192
PTotal [W] 252.000Battery load = x 100 = x 100 = 264.151 [W]
Inv. eff. [%] 95,4
Cell load:
Battery Load:Efficiencies DC to AC (table)= 78,8 % (SMPS-% load of the UPS) = 95,4 inv. Eff %.
Task 3 UPS type: DP3320E Total load: 315 kW PF load: 0,8 Back-up time: 20 min
Cellload [W/ cell] 688With ___ parallel string = = = 344 [W/ cell] Number of strings 2
Strings:
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Results of task 3Results of task 3
Battery Specification/Pack
Type UPS 12 - 475
Make Johnson
Number of cells 384
Cell load 344 W/cell
Min. cell voltage 1,7 V
Back-up time 20 min.
Number of blocks 128
Block dim. (HxWxL) 278 x 172 x 344mm
Total weight 6144 kg
Task 3 UPS type: DP3320E Total load: 315 kW PF load: 0,8 Back-up time: 20 min
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ReviewReview
Review
Battery Load
Battery Bank
Cell specifications - example 1
Example 2...
Battery ambient temperature
Battery recharging
Example 3...
Task 1...
Task 2...
Task 3...
Review
Battery parallel connection