How Much Voltage Can Insulation Withstand Before Breaking?

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SUMMARY

The discussion focuses on calculating the electric field strength within insulation separating conductors in a cable, specifically with a voltage difference of 120V and insulation thickness of 0.35cm. The dielectric strength of the insulation is 270kV/cm, which is crucial for determining the maximum voltage the insulation can withstand before breaking. The electric field strength can be calculated using the formula E = V/d, where E is the electric field strength, V is the voltage, and d is the distance. This formula also allows for determining the breakdown voltage based on the dielectric strength.

PREREQUISITES
  • Understanding of electric field strength calculations
  • Familiarity with dielectric strength concepts
  • Knowledge of voltage and distance relationships in electrical systems
  • Basic grasp of insulation properties in electrical engineering
NEXT STEPS
  • Research the formula E = V/d for electric field strength calculations
  • Study the implications of dielectric strength in insulation materials
  • Explore breakdown voltage calculations for various insulation types
  • Learn about the effects of voltage on different conductor materials
USEFUL FOR

Electrical engineers, students studying electrical engineering, and professionals involved in cable design and insulation testing will benefit from this discussion.

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Homework Statement


A conductors in a cable are separated by a .35cm of insulation .

Homework Equations



Calculate the electric field strength within the insulation when the conductor voltage difference is 120v. Also determine the voltage@ which the insulation may break if its dielectric strength is 270kv/cm


The Attempt at a Solution


given
voltage----120v
conductor size ----.35cm
dielectric strength 270kv
 
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jamz100 said:

Homework Statement


A conductors in a cable are separated by a .35cm of insulation .

Homework Equations



Calculate the electric field strength within the insulation when the conductor voltage difference is 120v. Also determine the voltage@ which the insulation may break if its dielectric strength is 270kv/cm


The Attempt at a Solution


given
voltage----120v
conductor size ----.35cm
dielectric strength 270kv

Well that is an impressive attempt. Field strength can be calculated with a simple formula if we know voltage and distance between the conductors. Even dimension analysis might reveal that formula. Same formula will actually solve the second one too but this time the voltage is the variable.
 

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