Distribution transformer installed at customer place with CT/PT and metering unit. Transformer power consumption and load connected on transformer is being measured by CT/PT connected at HT side of transformer.
Consumer will have to pay electricity charges for Load consumed and transformer inherent losses. Transformer no load/losses are constant and it is being charged to customer only. Hence installing high efficient low losses transformer is needed at site to reduce electricity bills.
Government has made it mandatory that every distribution transformer 11KV/33KV classes up to 2500KVA must be ISI marked.
ISI mark is awarded to manufacturers based on new specifications introduced by Government that is IS: 1180 Part I/2014 which replaced old specifications of IS: 2026
As per government rules three levels of transformer specifications are introduced and implemented throughout India which are
IS: 1180 – part I /2014 – Level-1
IS: 1180 – Part I / 2014 – Level-2
IS: 1180 – Part I / 2014 – Level-3
Level 1, Level 2 & Level 3 is having different losses mentioned in specifications. Level 3 is very high efficient transformer, Level-2 is moderdian losses transformer, Level-1 s high losses transformer.
|
MAXIMUM TOTAL LOSSES UP TP 11KV CLASS TRANSFORMER |
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|
S.NO |
RATING(KVA) |
IMPEDENCE(PERCENT) |
MAXIMUM TOTAL LOSSES(W) |
|||||
|
|
|
|
Energy Efficiecy Level1 |
Energy Efficiecy Level2 |
Energy Efficiecy Level3 |
|||
|
|
|
|
50%load |
100%load |
50%load |
100%load |
50%load |
100%load |
|
1 |
16 |
4.5 |
150 |
480 |
135 |
440 |
120 |
400 |
|
2 |
25 |
4.5 |
210 |
695 |
190 |
635 |
175 |
595 |
|
3 |
36 |
4.5 |
380 |
1250 |
340 |
1140 |
300 |
1050 |
|
4 |
100 |
4.5 |
520 |
1800 |
475 |
1650 |
435 |
1500 |
|
5 |
160 |
4.5 |
770 |
2200 |
670 |
1950 |
570 |
1700 |
|
6 |
200 |
4.5 |
890 |
2700 |
780 |
2300 |
670 |
2100 |
|
7 |
250 |
4.5 |
1050 |
3150 |
980 |
2930 |
920 |
2700 |
|
8 |
315 |
4.5 |
1100 |
3275 |
1025 |
3100 |
955 |
2750 |
|
9 |
400 |
4.5 |
1300 |
3875 |
1225 |
3450 |
1150 |
3330 |
|
10 |
500 |
4.5 |
1600 |
4750 |
1510 |
4300 |
1430 |
4100 |
|
11 |
630 |
4.5 |
2000 |
5855 |
1860 |
5300 |
1745 |
4850 |
|
12 |
1000 |
5 |
3000 |
9000 |
2790 |
7700 |
2620 |
7000 |
|
13 |
1250 |
5 |
3600 |
10750 |
3300 |
9200 |
3220 |
8400 |
|
14 |
1600 |
6.25 |
4500 |
13500 |
4200 |
11800 |
3970 |
11300 |
|
15 |
2000 |
6.25 |
5400 |
17000 |
5050 |
15000 |
4790 |
14100 |
|
16 |
2500 |
6.25 |
6500 |
20000 |
6150 |
18500 |
5900 |
17500 |
Power saving sheet also enclosed for ready reference comparison between Level-1, Level-2 & Levele-3.
100KVA Level1 Load Losses at 100% Load: 1800Watts
100KVA Level2 Load Losses at 100% Load: 1650Watts
Savings => 1800-1650=150Watts
365*24hours*0.15*8.50 = 11,169/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪11,169*5 = 55,845/-
100KVA Level3 Load Losses at 100% Load: 1500Watts
Savings => 1800-1500=300Watts
365*24hours*0.3*8.50 = 22,338/-
Savings for immediate 5 years 🡪22,338*5 = 1,11,690/-
160KVA Level1 Load Losses at 100% Load: 2200Watts
160KVA Level2 Load Losses at 100% Load: 1950Watts
Savings => 2200-1950=250Watts
365*24hours*0.25*8.50 = 18,615/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪18,615*5 = 93,075/-
160KVA Level3 Load Losses at 100% Load: 1700Watts
Savings => 2200-1700=500Watts
365*24hours*0.5*8.50 = 37,230/-
Savings for immediate 5 years 🡪37,230*5 = 1,86,150/-
200KVA Level1 Load Losses at 100% Load: 2700Watts
200KVA Level2 Load Losses at 100% Load: 2300Watts
Savings => 2700-2300=400Watts
365*24hours*0.4*8.50 = 29,784/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪29,784*5 = 1,48,920/-
200KVA Level3 Load Losses at 100% Load: 2100Watts
Savings => 2700-2100=600Watts
365*24hours*0.6*8.50 = 44,676/-
Savings for immediate 5 years 🡪 44,676*5 = 2,23,380/-
250KVA Level1 Load Losses at 100% Load: 3150Watts
250KVA Level2 Load Losses at 100% Load: 2930Watts
Savings => 3150-2930=220Watts
365*24hours*0.22*8.50 = 16,381.2/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 16,381.2*5 = 81,906/-
250KVA Level3 Load Losses at 100% Load: 2700Watts
Savings => 3150-2700=450Watts
365*24hours*0.45*8.50 = 33,507/-
Savings for immediate 5 years 🡪 33,507*5 = 1,67,535/-
315KVA Level1 Load Losses at 100% Load: 3275Watts
315KVA Level2 Load Losses at 100% Load: 3100Watts
Savings => 3275-3100=175Watts
365*24hours*0.175*8.50 = 13,030.5/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 13,030.5*5 = 65,152.5/-
315KVA Level3 Load Losses at 100% Load: 2750Watts
Savings => 3275-2750=525Watts
365*24hours*0.525*8.50 = 39,091.5/-
Savings for immediate 5 years 🡪 39,091.5*5 = 1,95,457.5/-
400KVA Level1 Load Losses at 100% Load: 3875Watts
400KVA Level2 Load Losses at 100% Load: 3450Watts
Savings => 3875-3450=425Watts
365*24hours*0.425*8.50 = 31,645.5/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 31,645.5*5 = 1,58,227.5/-
400KVA Level3 Load Losses at 100% Load: 3330Watts
Savings => 3875-3330=545Watts
365*24hours*0.545*8.50 = 40,580.7/-
Savings for immediate 5 years 🡪 40,580.7 *5 = 2,02,903.5/-
500KVA Level1 Load Losses at 100% Load: 4750Watts
500KVA Level2 Load Losses at 100% Load: 4300Watts
Savings => 4750-4300=450Watts
365*24hours*0.45*8.50 = 33,507/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 33,507*5 = 1,67,535/-
500KVA Level3 Load Losses at 100% Load: 4100Watts
Savings => 4750-4100=650Watts
365*24hours*0.65*8.50 = 48,399/-
Savings for immediate 5 years 🡪 48,399*5 = 2,41,995/-
630KVA Level1 Load Losses at 100% Load: 5855Watts
630KVA Level2 Load Losses at 100% Load: 5300Watts
Savings => 5855-5300=555Watts
365*24hours*0.555*8.50 = 41,325.3/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 41,325.3*5 = 2,06,626.5/-
630KVA Level3 Load Losses at 100% Load: 4850Watts
Savings => 5855-4850=1005Watts
365*24hours*1.005*8.50 = 74,832.3/-
Savings for immediate 5 years 🡪 74,832.3*5 = 3,74,161.5/-
1000KVA Level1 Load Losses at 100% Load: 9000Watts
1000KVA Level2 Load Losses at 100% Load: 7700Watts
Savings => 9000-7700=1300Watts
365*24hours*1.3*8.50 = 96,798/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 96,798*5 = 4,83,990/-
1000KVA Level3 Load Losses at 100% Load: 7000Watts
Savings => 9000-7000=2000Watts
365*24hours*2.0*8.50 = 1,48,920/-
Savings for immediate 5 years 🡪 1,48,920*5 = 7,44,600/-
1250KVA Level1 Load Losses at 100% Load: 10750Watts
1250KVA Level2 Load Losses at 100% Load: 9200Watts
Savings => 10750-9200=1550Watts
365*24hours*1.55*8.50 = 1,15,413/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 1,15,413*5 = 5,77,065/-
1250KVA Level3 Load Losses at 100% Load: 8400Watts
Savings => 10750-8400=2350Watts
365*24hours*2.35*8.50 =1,74,981/-
Savings for immediate 5 years 🡪 1,74,981*5 = 8,74,905/-
1600KVA Level1 Load Losses at 100% Load: 13500Watts
1600KVA Level2 Load Losses at 100% Load: 11800Watts
Savings => 13500-11800=1700Watts
365*24hours*1.7*8.50 = 1,26,582/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 1,26,582*5 = 6,32,910/-
1600KVA Level3 Load Losses at 100% Load: 11300Watts
Savings => 13500-11300=2200Watts
365*24hours*2.2*8.50 = 1,63,812/-
Savings for immediate 5 years 🡪 1,36,812*5 = 6,84,060/-
2000KVA Level1 Load Losses at 100% Load: 17000Watts
2000KVA Level2 Load Losses at 100% Load: 15000Watts
Savings => 17000-15000=2000Watts
365*24hours*2.0*8.50 = 1,48,920/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 1,48,920*5 = 7,44,600/-
2000KVA Level3 Load Losses at 100% Load: 14100Watts
Savings => 17000-14100=2900Watts
365*24hours*2.9*8.50 = 2,15,934/-
Savings for immediate 5 years 🡪 2,15,934*5 = 10,79,670/-
2500KVA Level1 Load Losses at 100% Load: 20000Watts
2500KVA Level2 Load Losses at 100% Load: 18500Watts
Savings => 20000-18500=1500Watts
365*24hours*1.5*8.50 = 1,11,690/-
Transformer Min Life: 25 Years
Savings for immediate 5 years 🡪 1,11,690*5 = 5,58,450/-
2500KVA Level3 Load Losses at 100% Load: 17500Watts
Savings => 20000-17500=2500Watts
365*24hours*2.5*8.50 = 1,86,150/-
Savings for immediate 5 years 🡪 1,86,150*5 = 9,30,750/-
Earlier transformer manufacturers used to follow: IS: 2026 specifications Later star rating and Level1, Level2, Level3 was introduced and specifications are changed to IS: 1180 – Part I – 2014 and Central Government made it mandatory to follow the IS: 1180 specifications and ISI mark on transformers up to 2500KVA for be purpose of energy savings and protections of environment with energy savings thus co2 emission will reduce to great extent.
Customer has to choose the transformer specifications and levels.
The information given here are for customer awareness purposes.
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