Coil Design: 24V DC 200W | Technical Assistance

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SUMMARY

The discussion focuses on designing a coil for a 24V DC application with a maximum power rating of 200W, specifically for use in 33kV VCBs as a tripping coil. Key parameters include the coil gauge, number of turns, and inner and outer diameters (ID & OD). Participants emphasize that coils should be rated by inductance, DC resistance, and saturation current rather than power alone. The acceptable series resistance for the circuit is noted to be 2.9 ohms.

PREREQUISITES
  • Understanding of coil design principles, including inductance and DC resistance.
  • Familiarity with electrical specifications for tripping coils in high-voltage circuit breakers.
  • Knowledge of wire gauge standards and their impact on coil performance.
  • Experience with calculating coil dimensions based on application requirements.
NEXT STEPS
  • Research coil inductance calculations for 24V DC applications.
  • Learn about wire gauge selection and its effect on resistance and current capacity.
  • Explore the specifications for tripping coils used in high-voltage circuit breakers.
  • Investigate methods for determining saturation current in coils wound on ferrous materials.
USEFUL FOR

Electrical engineers, coil designers, and technicians involved in high-voltage applications, particularly those working with circuit breakers and tripping mechanisms.

kranth90
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I need a technical assistance in designing of a coil which will work on 24V DC supply with a maximum wattage of 200W suggest me the coil guage, no of turns and the coil ID & OD.
 
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kranth90 said:
I need a technical assistance in designing of a coil which will work on 24V DC supply with a maximum wattage of 200W suggest me the coil guage, no of turns and the coil ID & OD.

Welcome to the PF.

What is the application for the coil? What inductance do you want? What series resistance can you tolerate in the circuit?

A coil is not rated by power (and especially not at 200W!). A coil is rated by its inductance, DC resistance, and its saturation current (if it is wound on a ferrous metal or ferrite).
 
I want to use it in 33kV VCB's as Tripping coil...
and here I'm giving the DC supply to the coil so there is no matter of inductance I think..
and the series resistance can be 2.9ohms..
 

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