3 Phase heating coil

[ASBTTE]

Hi. I'm making a 3 phase furnace with heating coils. Total power rating is 5 KW. I have to make one heating element for each phase. How do I split the KW rating? Will it be a straight 5/3? Also when calculating the resistance for each heater, should I calculate based on 220V(single phase voltage in India) or 440V (3 phase voltage)?

 

[Bobster]

Are the elements connected in star or delta configuration?

 

[Pete999]

Are the elements connected in star or delta configuration?

What Rob said!!!!!

 

[ASBTTE]

Are the elements connected in star or delta configuration?

We intend to use a Delta Connection

 

[Pete999]

We intend to use a Delta Connection

So each heating coil will be subjected to 440V across 2 phases, yes?

 

[ASBTTE]

Yes, that is correct

 

[Pete999]

Yes, that is correct

Yes, that is correct

Delta Connection (Δ): 3 Phase Power, Voltage & Current Values

What is Delta Connection (Δ)?Delta or Mesh Connection (Δ) System is also known as Three Phase Three Wire System (3-Phase 3 Wire) Voltage, Current & Power Values in 3-Phase Delta Connection. Line Voltages , Phase Voltages, Line Currents & Phase Currents & Power in Delta (Δ) Connection.

www.electricaltechnology.org

 

[telectrix]

We intend to use a Delta Connection

you must firstestablish whatvoltage teach coil requires.if it's 230V per coil, then 415V is :

 

[sinewove]

you must firstestablish whatvoltage teach coil requires.if it's 230V per coil, then 415V is :
View attachment 50546

In delta each coil would be 5000/3 = 1666watts.So res of coil would be v squared/watts = 440sq/1666=116ohms per coil.If you say the single phase v is 220,3 phase should be 380v not 440v,unless its a wierd system.
Regards,S

 

[telectrix]

weird