Electrical Load Calculator India - kW to kVA, House Wiring Load, Motor Load, 3-Phase Load
⚡ Electrical Load Calculator India
House Wiring, Motor FLC, 3-Phase Industrial & Solar Sizing - IS Standards Based
Electrical Load Calculation har project ki pehli step hai. Sahi calculation bina system overload hoga, cable jal sakti hai, ya fire ho sakti hai. Is tool mein IS 3043, NEC, IEC 60364 standards follow karte hain.
🏠 House Wiring Load Calculator
Ghar ke appliances add karein. Total load, MCB size, aur sanctioned load automatically calculate hoga.
📊 Results:
Total Connected Load: 0 kW
After Diversity: 0 kW
Full Load Current: 0 A @ 230V
Recommended MCB: --
Sanctioned Load: 0 kW (DISCOM apply ke liye)
Monthly Units: ~0 kWh
⚙️ Motor Full Load Current (FLC) Calculator
Motor nameplate data se FLC, starting current, cable, aur breaker size calculate karein.
📊 Motor Results:
Full Load Current: 0 A
Starting Current (DOL): 0 A (6×FLC)
kVA Input: 0 kVA
Recommended Cable: -- sq.mm Cu
Breaker/Contactor: --
Overload Relay: 0 A (1.05×FLC)
⚡ 3-Phase Industrial Load Calculator
Factory/warehouse ka total load, transformer size, busbar, aur main breaker sizing.
📊 Industrial Results:
kVA Demand: 0 kVA
Full Load Current: 0 A/Phase
Transformer Size: 0 kVA (with 0% spare)
Main Breaker: --
Busbar Size: --
Capacitor Bank: 0 kVAR (PF to 0.99)
☀️ Solar System Sizing Calculator
Rooftop solar ke liye inverter, battery, aur panel size calculate karein.
📊 Solar Results:
Inverter Size: 0 VA
Battery Capacity: 0 Ah
Solar Panel: 0 W total
Panel Count: 0 × 550W panels
Daily Generation: 0 kWh
Monthly Saving: ~₹0 (@₹8/unit)
📖 How to Use - Step by Step
Load Type Select Karein
Ghar ke liye "House Wiring", motor ke liye "Motor FLC", factory ke liye "3-Phase Industrial", solar ke liye "Solar System" use karein.
Details Dalein
Appliance quantity, motor HP, ya total kW load daalein. Default values already filled hain - sirf apne hisaab se change karein.
Calculate Button Dabayein
"Calculate" button pe click karein. Results instantly aa jayenge - MCB size, cable size, transformer size sab.
Results Save Karein
Screenshot lein ya results ko copy kar ke apne project file mein save karein. Direct procurement mein use kar sakte hain.
🧮 All Formulas Used
📐 Single Phase Power (House Wiring)
Example: 230V, 10A, PF 0.9 → P = 230 × 10 × 0.9 / 1000 = 2.07 kW
📐 Three Phase Power (Industrial)
Example: 415V, 100A, PF 0.85 → P = 1.732 × 415 × 100 × 0.85 / 1000 = 61.1 kW
📐 Motor Full Load Current
Example: 10 HP, 3-phase, 415V, η=0.90, PF=0.85 → I = 10×746/(1.732×415×0.90×0.85) = 13.6 Amps
📐 kW to kVA Conversion
📐 Solar System Sizing
📊 Quick Reference Tables
🏠 Common Appliance Wattage (India)
| Appliance | Watts | Starting Watts | Hours/Day |
|---|---|---|---|
| LED Bulb (9W) | 9 | 9 | 6-8 |
| Tube Light (36W) | 36 | 36 | 6-8 |
| Ceiling Fan | 75 | 100 | 8-12 |
| Refrigerator (165L) | 150 | 800 | 24 |
| AC 1.5 Ton | 1800 | 2500 | 6-8 |
| AC 1 Ton | 1200 | 1800 | 6-8 |
| Washing Machine | 500 | 1500 | 1-2 |
| Water Pump (0.5HP) | 375 | 1500 | 0.5-1 |
| Geyser (15L) | 2000 | 2000 | 1-2 |
| Induction Cooktop | 2000 | 2000 | 2-3 |
| Microwave | 1200 | 1200 | 0.5 |
| TV LED 32" | 50 | 50 | 4-6 |
| Iron | 1000 | 1000 | 0.5 |
| Mixer Grinder | 500 | 1000 | 0.25 |
| Computer + Monitor | 200 | 200 | 4-8 |
| Water Heater Instant | 3000 | 3000 | 0.5 |
⚡ MCB/MCCB Selection Chart
| Load (kW) | @230V Current | @415V 3-ph | MCB Rating | Cable Cu |
|---|---|---|---|---|
| Up to 1 kW | 4.3 A | 1.4 A | 6A SP | 1.5 sq.mm |
| 1 - 2 kW | 8.7 A | 2.8 A | 10A SP | 2.5 sq.mm |
| 2 - 3 kW | 13 A | 4.2 A | 16A SP | 2.5 sq.mm |
| 3 - 5 kW | 21.7 A | 6.9 A | 25A SP | 4 sq.mm |
| 5 - 7 kW | 30.4 A | 9.7 A | 32A SP | 6 sq.mm |
| 7 - 10 kW | 43.5 A | 13.9 A | 40A DP | 10 sq.mm |
| 10 - 15 kW | 65.2 A | 20.8 A | 63A DP | 16 sq.mm |
| 15 - 20 kW | 87 A | 27.8 A | 80A DP | 25 sq.mm |
| 20 - 30 kW | 130 A | 41.7 A | 100A TP MCCB | 35 sq.mm |
| 30 - 50 kW | 217 A | 69.6 A | 160A TP MCCB | 50 sq.mm |
| 50 - 75 kW | 326 A | 104 A | 250A TP MCCB | 70 sq.mm |
| 75 - 100 kW | 435 A | 139 A | 320A TP MCCB | 95 sq.mm |
🔩 Transformer Sizing Reference
| Load (kW) | Transformer (kVA) | Primary | Secondary | Application |
|---|---|---|---|---|
| Up to 50 kW | 63 kVA | 11kV | 415V | Small workshop |
| 50 - 100 kW | 100 kVA | 11kV | 415V | Medium shop |
| 100 - 200 kW | 250 kVA | 11kV | 415V | Small factory |
| 200 - 400 kW | 500 kVA | 11kV | 415V | Manufacturing |
| 400 - 800 kW | 1000 kVA | 11kV/33kV | 415V | Large plant |
| 800 - 1500 kW | 1500-2000 kVA | 33kV | 415V | Heavy industry |
❓ Frequently Asked Questions
Example: 1.5T AC ka load 1800W hai (load calc), par wo sirf 6 ghante chalta hai toh daily energy = 1800W × 6h = 10.8 kWh (energy calc).
IS 3043 ke hisaab se:
• Residential: 0.5 to 0.8
• Commercial: 0.7 to 0.9
• Industrial: 0.8 to 1.0
Agar diversity factor nahi lagayein toh system over-designed hoga aur cost zyada aayegi.
1. Penalty: DISCOM PF < 0.9 pe penalty lagata hai
2. Higher Current: Same kW ke liye zyada current → cable aur transformer oversize
3. Losses: I²R losses badh jaate hain → energy waste
Solution: Capacitor bank lagayein.
Starting Methods:
• DOL: 6-7 × FLC
• Star-Delta: 2-2.5 × FLC
• Soft Starter: 2-4 × FLC
• VFD: 1-1.5 × FLC
1. Current Carrying Capacity: IS 732 ke hisaab se
2. Voltage Drop: Max 2% for lighting, 5% for power
3. Short Circuit Withstand: Cable fault current se jal na jaaye
4. Derating Factors: Ambient temp, grouping, installation method
Apply kaise karein:
1. Apne area ke DISCOM office jayein (MSEDCL, BESCOM, DHBVN, etc.)
2. Load calculation report submit karein
3. Application form + ID proof + Property documents
4. Inspection hoga, phir meter lagaya jayega
Tip: Hamesha 20-30% extra sanctioned load rakhein future ke liye.
Hybrid (Battery + Grid): Backup during power cuts, higher cost, battery life 5-7 years. Best for areas with frequent power cuts.
Off-Grid (Only Battery): No grid connection needed, highest cost, large battery bank. Best for remote areas.
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