Motor Nameplate
Calculator
Motor nameplate ki values daalo — FLC, Starting Current, Torque, Cable Size, MCB/MCCB aur Overload Relay instantly calculate hoga.
Motor type select karo — nameplate se values enter karo — protection aur wiring recommendations instantly milenge.
Motor Nameplate Kya Hota Hai?
Har motor par ek plate hoti hai jisme us motor ki saari technical details likhi hoti hain — yeh Motor Nameplate hai. Gulf ki kisi bhi site pe motor lagane se pehle yeh plate padhna sabse zaroori kaam hai.
Main Mohammad Arif hoon — 12+ saal mein Maine Qatar University, Sidra Hospital, TDGISERV Qatar jaise projects pe saikdon motors ka selection, wiring aur commissioning kiya hai. Har baar pehla kaam — nameplate padhna.
Nameplate Ki Har Value Ka Matlab
| Value | Matlab | Example |
|---|---|---|
| kW | Motor ki mechanical output power | 7.5 kW |
| V (Voltage) | Supply voltage | 415V (3Ph), 230V (1Ph) |
| A (Amps) | Full Load Current — cable size isi se | 15.2 A |
| Hz | Frequency — Qatar/India: 50Hz | 50 Hz |
| RPM | Speed at full load | 1450 RPM |
| PF (cos φ) | Power factor | 0.85 |
| η (Eta) | Efficiency | 90% |
| IP Rating | Ingress protection — dust/water | IP55 |
| Insulation Class | Temperature rating of winding | Class F (155°C) |
| Duty Cycle | Running pattern | S1 (Continuous) |
FLC Formula — 3-Phase vs 1-Phase
1-Phase: FLC = kW × 1000 ÷ (V × PF × η)
where: √3 = 1.732 | η = efficiency (0 to 1)
Real Site Example — Qatar
Nameplate: 7.5 kW | 415V | 3Ph | PF 0.85 | η 90% | 1450 RPM
FLC = 7500 ÷ (1.732 × 415 × 0.85 × 0.90) = 13.6 A
Cable: FLC × 1.25 = 17A → 2.5mm² copper
MCB: 20A MCCB
OLR Setting: 13.0 – 14.3 A
Torque: (7500 × 60) ÷ (2π × 1450) = 49.4 N·m
Starting Current — DOL vs Star-Delta vs VFD
| Starter Type | Starting Current | Best For |
|---|---|---|
| DOL | 6 × FLC (600%) | Small motors up to 5.5 kW |
| Star-Delta | 2 × FLC (200%) | 5.5 kW to 37 kW |
| Soft Starter | 2-3 × FLC (adjustable) | Any size, smooth start |
| VFD | 1.5 × FLC (150%) | Variable speed, energy saving |
Gulf Interview Mein Pooche Jaane Wale Sawaal
Qatar, UAE, Saudi ki sites pe supervisors yeh poochte hain: “Is motor ki FLC kya hogi?”, “Cable size kaise decide karo?”, “OLR setting kya rakhoge?” — is calculator se yeh sab instantly calculate kar sakte hain.
kW to Amp Calculator | HP to kW Calculator | Motor Starting Current | Power Factor Calculator
🔗 Related Posts:
DOL Starter Wiring Guide | VFD Maintenance Guide | Motor Winding Test Guide
