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UPS Sizing calculation for Design Electrical Engineers
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CLIENT - IOCL BARAUNI (BIHAR)
CONSULTANT -
PROJECT -
HYDROCARBON PROJECT ENGINEERS LTD
ETP/BTP MODERNIZATION PROJECT
CONTRACTOR - UEM INDIA PRIVATE LIMITED
6 29.09.11 JPY AJG DKS
4 19.05.11 JPY AJG DKS
AJG DKS
DOC. CONTROL NO. : DC/E/515
2 28.03.11
UPS LOAD CALCULATON
3 31.03.11 JPY AJG DKS
0 14.05.10 JPY NIRAJ V.KUMAR
JPY
JPY JPY DKS
REV DATE PREPARED BY REVIEWED BY APPROVED BY
FOR
APPROVAL
1 18.03.11
5 29.06.11 JPY AJG DKS
Page :1 of 2
SN Unit Load
(VA)
Qty Load on UPS
(VA)20 10 20030 2 6010 2 20300 2 600100 2 200
2 100 1 100
3 200 1 200
4 1000 1 1000
5 35 2 706 100 1 1007 125 2 2508 375 1 3759 195 2 39010 400 1 400
11 3965
12 991.25
13 4956.25
14 4956.25
15 7500
16 1 Hrs.
= A
= A
= VA
6 29.09.11 JPY DKS
5 29.06.11 JPY DKS
4 19.05.11 JPY DKS
3 31.03.11 JPY DKS
2 28.03.11 JPY DKS
1 18.03.11 JPY DKS
0 1.06.10 JPY V.KUMAR
REV DATE PREPARED BY APPROVED BY
DOCUMENT NO.
7500 / 110
Selected Rating of UPS
Back up Time for Full Load
UPS SIZING CALCULATIONS FOR BTP
Therefore Load on UPS
Considering spare capacity of 25% for future expansion
Therefore, total load requirement on UPS
1
Flow Transmitter (Magnetic Type)Oil AnalyzerpH AnalyzerTOC AnalyzerSulphide Analyzer
Required UPS Rating (Minimum)
Equipment/Item
Battery charging load
36.05
Inrush current during start-up of the biggest block
load1370
Dell 25" LCD MonitorDell Dell Precision T3500 Workstation without MonitorDell Optiplex GX 760 Workstation without Monitor
Inrush Current Calculations:
Practically since the UPS is having a static bypass line, the system will transfer the load to
3965 / 110
Full load current of the UPS68.18
Total load current
the load to the main line during transients. However to verify the capability of the inverter to feed the transient in the worst case of mains not available during the transient, the inrushcurrent verification is done as below
12V DC, 8.33 A, Bulk Power Supply (Redundant) for DCS
controller
24V DC, 8.33A Bulk Power Supply (Redundant) for
wireless gateway
24V DC, 41.67A Bulk Power Supply (Redundant) for
Solenoid Valve
8 port Ethernet switchDell 20.1" TFT Monitor
REVIEWED BY
UPS LOAD CALCULATION
BTP-502-02-D19A
DOC. CONTROL NO. : DC/E/515
AJG
AJG
FOR APPROVALAJG
AJG
NIRAJ
AJG
AJG
Page :2 of 2
=
= A
=
= A
= A= A
=
=
= A
=
= A= A
= A
6 28.09.11 JPY DKS
5 29.06.11 JPY DKS
4 19.05.11 JPY DKS
3 31.03.11 JPY DKS
2 28.03.11 JPY DKS
1 18.03.11 JPY DKS
0 1.06.10 JPY V.KUMAR
REV DATE PREPARED BY APPROVED BY
DOCUMENT NO.
Crest factor for the load 3 (Assumed, to be cofirmed by vendor)
150% for 10s
(PLC connected load of 1300VA)
5*1370/110(Inrush current equals to 5 times the full load currrent)
62.27
Load current (excluding the biggest block load) (3965-1370)/110
23.59
Total load current during start up of the biggest block load on the running UPS
(62.27+23.59)85.86
As per UPS datasheet overload capacity
of the biggest block load with the rest of loads running.
Therefore, Selected UPS is suitable based on the inrush current calculation.
Based on Crest Factor:
102.27
The overload capacity of the UPS is "Greater" than the maximum inrush current during start-up
Due to non-linearity of the instrument load connected to this UPS, crest factor verification is alsodone as follows.
The selected UPS of 7.5KVA is suitable
170.45
Therefore, Selected UPS is adequate.
Conclusion:
Ipeak (for full load rms current of 36.05 Amp) 3 * 36.05108.14
Ipeak for 7.5KVA UPS = 2.5 * 68.18 A
(Considering crest factor of 2.5 for UPS)
1.5*7500/110
UPS LOAD CALCULATION
BTP-502-02-D19A
DOC. CONTROL NO. : DC/E/515
AJG
AJG
AJG
AJG
AJG
NIRAJ
REVIEWED BY
AJG
FOR APPROVAL
UPS Power Consumtion List
Doc. No. :15180135-DCS-BTP-UPS-LOAD
Revision 3 – 29-June-2011 – Page 6 of 20
IOCL,Barauni
UEM Pvt. Ltd.
Sr. Group Group Name Model Item Description QuantityUnit Amp
12VDC
Total Amp
12VDC
Unit Amp
24VDC
Total Amp
24VDC
1 CNTR BTP VE3006 Controller (MDPlus) 2 1.80 3.60 0.00 0.00
2 AI16 BTP VE4003S2B6 Series 2 AI, 16-Channel, 4-20 mA, HART Card 5 0.15 0.75 0.60 3.00
3 AO8 BTP VE4005S2B1 Series 2 AO, 8 Channel 4-20 mA with HART Card 1 0.15 0.15 0.30 0.30
4 DI32 BTP VE4001S2T2B4 Series 2 DI, 32-Channel, 24 VDC, Dry Contact Card 15 0.08 1.13 0.15 2.25
5 DO32 BTP VE4002S1T2B5 Series 2 DO, 32-Channel, 24 VDC, High-Side Card 6 0.15 0.90 0.00 0.00
BTP Smart Wireless Gateway 1 0.00 0.00 0.50 0.50
Total 6.53 6.05
With 20% Spare 7.83 7.26
Grand Total 7.83 7.26
1 Relay BTP -- 24V DC SOVs 66 0.00 0.00 0.50 33.00
Total 0.00 33.00
With 20% Spare 0.00 39.60
Grand Total 0.00 39.60
12V DC & 24V DC Power Consumption Calculation for System
24V DC Power Calculation for Powering Field Solenoid
Emerson Process Management 2009 - Confidential and Proprietary
UPS Power Consumtion List
Doc. No. :15180135-DCS-BTP-UPS-LOAD
Revision 3 – 29-June-2011 – Page 3 of 20
IOCL,Barauni
UEM Pvt. Ltd.
110 V AC Incoming Supply
Sr. Group Name Make / Model Item Description Quantity Load (VA) Unit Amp Total Amp Total Required Amp
1 BTP Meanwell 12V DC, 8.33 A, Bulk Power Supply (Redundant) 1 100 0.909 0.91 0.91
2 BTP Meanwell 24V DC, 8.33A Bulk Power Supply (Redundant) 1 200 1.818 1.82 1.82
3 BTP Meanwell 24V DC, 41.67A Bulk Power Supply (Redundant) 1 1000 9.091 9.09 9.09
4 BTP 3-Com/D-Link 8 Port Ethernet switch 2 35 0.318 0.64 0.64
5 BTP Dell 20.1" TFT Monitor 1 100 0.909 0.91 0.91
6 BTP Dell 25" LCD Monitor 2 125 1.136 2.27 2.27
7 BTP Dell Dell Precision T3500 Workstation without Monitor 1 375 3.409 3.41 3.41
8 BTP Dell Dell Optiplex GX 760 Workstation without Monitor 2 195 1.773 3.55 3.55
Total Load (Amp) 22.59 22.59
Total KVA for 110 V AC 2.49 2.50
110V AC UPS Power Consumption
Emerson Process Management 2009 - Confidential and Proprietary