ITI Electrician Single Phase aur Three Phase System: Complete Notes in Hindi
ITI Electrician Single Phase aur Three Phase System: Complete Guide in Hindi
Bharat Skills aur NIMI NCVT syllabus ke mutabiq, ITI Electrician 1st Year ke liye **Single Phase aur Three Phase System (सिंगल और थ्री फेज सिस्टम)** power generation aur distribution ka mukhya aadhar hai. Gharon aur udyogo me bijli ki supply inhi systems ke madhyam se pahunchti hai.
Electrical power ko kaise transmit kiya jata hai aur dono systems me kya antar hai, aayiye iske baare me विस्तार se samajhte hain.
1. Single Phase System (एक कला प्रणाली)
Single phase system me ek single alternating voltage wave hoti hai. Isme aamtaur par do ya teen wires ka use hota hai: ek Phase (Live), ek Neutral, aur ek Earth wire.
Upyog (Usage)
Gharelu upkaron (jaise pankha, light, TV, refrigerator) ke liye single phase 230V supply ka use hota hai.
Voltage Level
Bharat me standard single phase domestic voltage 230V aur frequency 50 Hz hoti hai.
2. Three Phase System (तीन कला प्रणाली)
Three phase system me teen alag-alag alternating voltages hoti hain jo ek doosre se **120 degrees (degree phase angle)** ke phase difference par chalti hain. Isme 3 ya 4 wires ka prayog hota hai.
Upyog (Usage)
Bari industrial motors, pumps, factories aur heavy load ke transmission ke liye three phase 415V supply use hoti hai.
Connection Types
Three phase system ko **Star Connection** (\(Y\)) aur **Delta Connection** (\(\Delta\)) me joda jata hai.
3. Single Phase aur Three Phase me Mukhya Antar
- Efficiency: Three phase system zyada efficient hota hai aur kam copper me adhik power transmit kar sakta hai, jabki single phase chhote loads ke liye hota hai.
- Starting Torque: Three phase motors me self-starting torque hota hai jabki single phase motors ko start karne ke liye capacitor ki aavashyakta padti hai.
- Wires: Single phase me 2 wires (Phase + Neutral) aur three phase me aamtaur par 4 wires (R, Y, B + Neutral) hoti hain.