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Standard Size of The DG sets |
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| KVA | KVA | KVA | KVA | KVA |
| 7.5 KVA | 20KVA | 35 KVA | 62.5 KVA | 100 KVA |
| 10 KVA | 25 KVA | 40 KVA | 75 KVA | 125 KVA |
| 15 KVA | 30 KVA | 50 KVA | 82.5 KVA | 200 KVA |
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D.G Foundation Bar Size |
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| Rating of D.G set | Size of Bar |
| Up to 82.5 KVA | 10MM |
| 100 KVA To 200 KVA | 12MM |
| 250 KVA to 500KVA | 16MM |
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Minimum Capacity of Fuel Service Tank |
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| AS per CPWD | |
| Capacity of DG set | Minimum Fuel Tank Capacity |
| Upto 25 KVA | 100 Liters |
| Above 25 to 62.5 KVA | 120 Liters |
| Above 62.5 KVA to 125 KVA | 225 Liters |
| Above 125 KVA to 200 KVA | 285 Liters |
| Above 200 KVA to 380 KVA | 500 Liters |
| Above 380 KVA to 500 KVA | 700 Liters |
| Above 500 KVA to 750 KVA | 900 Liters |
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Battery Size for D.G Set |
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AS per CPWD |
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| DG Set Capacity | Battery Capacity (AH) | Cu Cable Size (Sq. mm) | Electrical System (Volts) |
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Up to 25 KVA |
88 | 35 |
12 |
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Above 25 KVA upto 62.5 KVA |
120 | 50 |
12 |
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Above 62.5 KVA up to 82.5 KVA |
150 | 50 |
12 |
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Above 82.5.KVA up to 125 KVA |
180 | 50 |
12 |
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Above 125 KVA up to 500 KVA |
180 | 70 |
12 |
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Above 500 KVA |
360 | 70 |
24 |
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Depths of PCC (Plain Cement Concrete) for DG Set |
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As per CPWD |
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| DG Set Capacity (KVA) | Typical Depth of PCC Foundation (For soil bearing capacity 5000 kg/sq meter) |
| 750-2000 | 600 mm |
| 625 | 400 mm |
| 320-500 | 400 mm |
| 200-320 | 400 mm |
| 82.5 -200 | 400 mm |
| Upto 82.5 | 200 mm |
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Foundation & Earthing for D.G Set |
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As Per CPWD |
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| Ieam | Descriptions |
| D.G set inside Room | A PCC foundation (1:2:4, M-20 grade) of approximate depth 150 mm above the finished Generator set Room Floor level |
| The length and breadth of foundation should be at least 250 mm more on all sides than the size of the enclosure. | |
| D.G set in Open Room | A PCC (1:2:4, M-20 grade) foundation of weight 2.5 times the operating weight of the Generator set with enclosure or as recommended by the Generator set manufacturer, whichever is higher |
| 300 mm of this foundation height should be above the ground level. The length and breadth of foundation should be at least 250 mm more on all sides than the size of enclosure. | |
| Earthing | Copper plate earthing (Neutral Grounding) shall be provided for DG Sets of capacity 500 KVA or above |
| whereas G.I. plate earthing (Neutral Grounding) shall be provided for DG Sets below 500 KVA capacity. The body earthing shall generally be of G.I | |
| Numbers of earthing for each DG Sets | 2No’s earthing sets for Genset/ control panel body. |
| 2No’s earthing sets for neutral. | |
| In case there are more than one DG Set in one location, independent two nos. neutral earthing shall be provided for each DG set. However, two nos. earthing sets shall be common for the body earthing of DG Sets | |
| DG Set of 500 KVA capacity or above:- Copper strip | |
| DG Set below 500 KVA capacity:- GI strip | |
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D.G Detail according to Size |
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| D.G Size (KVA) | L x W x H (Canopy) mm | Approx Weight (Kg) | Fuel Tank (Ltrs) | Fuel Consumption (Ltr/hr) | Oil Consumption (Ltr/hr) |
| 12.5 | 2040 x 1230 x 1450 | 1050 | 60 | 2.3 | 0.02 |
| 15 | 2040 x 1230 x 1450 | 1050 | 65 | 2.3 | 0.02 |
| 20 | 2240 x 1230 x 1450 | 1300 | 65 | 3.7 | 0.03 |
| 30 | 2510 x 1130 x 1450 | 1300 | 65 | 6.3 | 0.03 |
| 40 | 3350 x 1180 x 1650 | 1500 | 100 | 7.8 | 0.03 |
| 50 | 3350 x 1180 x 1650 | 1500 | 100 | 8.3 | 0.03 |
| 62.5 | 3350 x 1180 x 1650 | 1930 | 150 | 10.5 | 0.03 |
| 75 | 3605 x 1405 x 1600 | 1950 | 150 | 13 | 0.03 |
| 100 | 3940 x 1700 x 1850 | 2500 | 300 | 15.7 | 0.05 |
| 125 | 3950 x 1700 x 1850 | 2700 | 300 | 19 | 0.05 |
| 140 | 4600 x 1850 x 1950 | 3580 | 300 | 22.6 | 0.06 |
| 160 | 4600 x 1850 x 1950 | 3720 | 450 | 25.9 | 0.14 |
| 180 | 4970 x 1730 x 2045 | 3870 | 450 | 27.7 | 0.14 |
| 200 | 4970 x 1730 x 2045 | 3950 | 450 | 29.8 | 0.14 |
| 250 | 4970 x 1730 x 2050 | 4660 | 450 | 37.7 | 0.15 |
| 275 | 5700 x 2030 x 2515 | 5860 | 450 | 50 | 0.15 |
| 320 | 5700 x 2030 x 2515 | 5860 | 450 | 57 | 0.3 |
| 400 | 5905 x 2030 x 2520 | 6180 | 990 | 65.1 | 0.3 |
| 500 | 6205 x 2030 x 2550 | 6990 | 990 | 81.3 | 0.3 |
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FUEL CONSUMPTION FOR DG SET: |
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| Generator KVA | Diesel consumption Liter per hour |
| 5 | 1.25 |
| 15 | 2.91 |
| 20 | 4.78 |
| 25 | 4.78 |
| 30 | 6.55 |
| 40 | 8.11 |
| 50 | 10.19 |
| 62.5 | 10.92 |
| 75 | 13.52 |
| 82.5 | 13.52 |
| 125 | 19.76 |
| 140 | 23.4 |
| 200 | 30.99 |
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D.G Spacing Guidance |
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| Description | DG set with Acoustic Enclosure | Open DG set in room. | |
| in Open Area | in Closed Area | ||
| Free space on both sides | Min. 1.5 m | Min. 1.5 m | Min. 2 m |
| Free space at front side (Radiator Hot air outlet at Front) | Min. 3 m | Min. 3 m | N/A |
| Free space at front side (Radiator Hot air outlet at Top) | Min. 1.0 m | Min. 1.5 m | N/A |
| Free space at rear side (Alternator) |
Min. 2 m | Min. 2 m | Min. 2 m |
| Fresh air inlet opening area | N/A | N/A | Min 1.5 times of the Radiator area. |
| Hot air discharge opening area | N/A | N/A | Min 2.5 times of the Radiator area. |
| Distance between two sets | Min 1.5 meter between two canopies |
Min 1.5 meter between two canopies |
Min 1.5 meter between two foundations. |
December 01, 2017 at 07:03PM
