Transformer basics, construction (very detailed) and aplicationFull description
dg sizingFull description
Switchyard PMCC Load Analysis Bus Section – I S. No.
Description
1 2
Feeder for Lighting Transformer Package Chiller – 1 power supply Package Chiller – 3 power supply Feeder for vent fans swyd control room cable vault Feeder for vent sys battery and charger room swyd AHU Fan 1 AHU Fan 4 Cooling tower fan 1 Condenser water pump 1 Condenser water pump 3 BMK 1 BMK 2 BMK 3 BMK 4 Feeder for AHP control room AC 220 V DC Battery charger 48 V DC Battery Charger Feeder for transformer oil filter Single phase 230 V outlets (5 Nos.) Feeder 1 for ICT CCC Spare feeders Connected load in KW
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Rating KW 64 45
Duty C/I
LF
C C
0.9 0.9
Mode R S 1 1
45
C
0.9
1
15
C
0.9
7.5
C
7.5 7.5 7.5 3.7 3.7 2.2 2.2 2.2 2.2 15
Max. Demand KW KVA 57.6 67.76 40.5 47.65 0.0
0.0
1
13.5
15.88
0.9
1
6.75
7.94
C C C C C C C C C C
0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9
1
6.75 0.0 6.75 3.33 0.0 1.98 1.98 0. 0.0 1.98 13.5
7.94 0.0 7.94 3.92 0.0 2.33 2.33 0.0 2.33 15.88
15 5 15 5
C C I I
0.9 0.9 0.4 0.4
0.0 4.5 0.0 2
0.0 5.29 0.0 2.35
2
C I
0.9 0.4
1.8 0.0 162.92
2.12 0.0 191.67
272.2
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Bus Section – II S. No.
Description
1 2
Feeder for Lighting Transformer Package Chiller – 2 power supply 220 V DC Battery Charger Welding Db supply AHU Fan 2 AHU Fan 3 Cooling tower fan 2 Cooling tower fan 3 Feeder for vent in AC plant room – swyd control room Feeder for vent fans switchgear room – swyd control bldg 48 V DC Battery charger Condenser water pump 2 BMK 5 BMK 6 BMK 7 BMK 8 STP sump pump 2 Feeder for heater in AHU room Feeder for humidifier in AHU room Fresh air fan for AHU room Feeder for CHP Control room AC Feeder for control panel of AC system ESP room Feeder for control panel of AC system Swyd control room Single phase 230 V outlet (5 Nos) Feeder – 2 for ICT CCC Spare Connected load in KW Total connected load in KW
3 4 6 7 8 8
9 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Rating KW 64 45
Duty C/I
LF
Mode R S 1 1
Max. Demand KW KVA 0.0 0.0 40.5 47.65
C C
0.9 0.9
15 30 7.5 7.5 7.5 7.5 5
C C C C C C C
0.9 0.9 0.9 0.9 0.9 0.9 0.9
1 1 1 1 1 1
13.5 27 6.75 6.75 6.75 0.0 4.5
15.88 31.76 7.94 7.94 7.94 0.0 5.29
5
C
0.9
1
4.5
5.29
5 3.7 2.2 2.2 2.2 2.2 2.2 2 2
C C C C C C C I I
0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.4 0.4
1 1
0.0 3.33 0.0 1.98 1.98 0.0 0.0 0.8 0.8
0.0 3.92 0.0 2.33 2.33 0.0 0.0 0.94 0.94
1.5 15
C C
0.9 0.9
1 1
1.35 13.5
1.59 15.88
2.2
C
0.9
1
1.98
2.33
2.2
C
0.9
1
1.98
2.33
5
I
0.4
1
2
2.35
0.0 0.0 141.93 304.85
0.0 0.0 166.98 358.65
245.6 517.8
Maximum Demand Maximum demand with 10% margin Transformer rating selected Full load current of transformer selected Switchgear incomer rating
- 359 KVA - 395 KVA – 630 KVA – 876 Amps. – 1250 Amps.
