Star Delta Timer Wiring aur Time Setting Kaise Karein? (100% Practical Guide) | Electrical Seekho

   

Hello Dosto! Electrical Seekho Team mein aapka ek baar fir swagat hai. Agar aap kisi badi site par kaam kar rahe hain jahan heavy 3-phase motors (jaise bade water pumps, AHU, ya chillers) lagi hain, toh aapne Star-Delta Starter zaroor dekha hoga. Aur is starter ka sabse main 'Hero' hota hai uska Timer!

Aaj is post mein hum aasan bhasha mein sikhenge ki ek Star-Delta Timer ki wiring kaise hoti hai aur motor ke hisaab se isme kitne second ka time set karna chahiye.

🤔 Star-Delta Timer Ka Kaam Kya Hai?

Jab hum kisi badi motor ko direct chalu karte hain, toh wo shuru mein apne normal current se 6 se 7 guna zyada current (Starting Current) leti hai. Isse motor jal sakti hai ya voltage drop ho sakta hai. Timer ka kaam ye hai ki wo motor ko pehle 'Star' connection mein chalata hai (taki current kam rahe), aur kuch seconds baad automatic usko 'Delta' (full speed) connection mein shift kar deta hai.

 

 

                                                              

 

 

 

 

🔌 Timer Ki Wiring Kaise Karein? (Terminal Details)

Timer ke upar kuch numbers aur letters likhe hote hain. Chaliye unko decode karte hain:

• A1 aur A2 (Coil Supply): Ye timer ko chalu karne ki power supply hai. Agar timer 220V ka hai, toh A1 mein Phase (Control MCB se) aur A2 mein Neutral denge.

• 15 (Common Terminal): Yahan hum A1 se ek chota sa wire loop karke (Phase) dete hain. Ye main control power hoti hai jo aage Star aur Delta contactors mein jayegi.

• 16 (NC - Normally Closed): Ye Star Contactor ki taraf jane wali wire hai. Jab timer ON hota hai, toh sabse pehle supply 15 se 16 mein jati hai aur Star contactor lag jata hai.

• 18 (NO - Normally Open): Ye Delta Contactor ki taraf jane wali wire hai. Jab set kiya hua time khatam ho jata hai, toh timer supply ko 16 se hata kar 18 mein bhej deta hai, aur Delta contactor lag jata hai.

(💡 Electrical Seekho Pro Tip: Star aur Delta contactor ki coil mein wire dene se pehle unke beech mein 'Interlocking' zaroor karein, taaki dono ek sath kabhi ON na ho jayein!)

⏱️ Timer Mein Kitna Time Set Karein?

Ye sabse bada sawal hota hai ki dial ko ghumakar time kitna rakhein? Iska ek simple practical rule hai: Motor ko apni 75% se 80% full speed pakadne mein jitna time lagta hai, utna hi time set karna chahiye.

• Choti Motors (5 HP se 15 HP): Inke liye 5 se 8 Second ka time kafi hota hai.

• Badi Motors (20 HP se 50 HP): Inke liye 10 se 15 Second ke beech ka time best rehta hai.

• Agar aap time bahut jaldi (jaise 2-3 second) set kar denge, toh motor Star mein puri speed nahi pakad payegi aur Delta mein aate hi line mein jerk (jhatka) aayega.

Safety Warning ⚠️: Control panel ke andar live wiring par kaam karte waqt hamesha main power band rakhein aur proper PPE (gloves/shoes) ka istemal karein.

Agar aapko is wiring guide se madad mili ho, toh is post ko apne electrician doston ke Whatsapp groups mein zaroor share karein. Site ke aise hi practical aur asaan technical tips ke liye Electrical Seekho ke sath jude rahein!