1. What is Dielectric Strength?

Dielectric strength is the maximum electric field that a material can withstand without breaking down. It's a critical parameter in electrical insulation design and material selection for high-voltage applications.

2. How Does the Calculator Work?

The calculator uses the dielectric strength formula:

Where:

• \( DS \) — Dielectric strength (V/m)
• \( V \) — Breakdown voltage (V)
• \( d \) — Thickness of material (m)

Explanation: The formula calculates the electric field strength at which dielectric breakdown occurs in a material.

3. Importance of Dielectric Strength Calculation

Details: Accurate dielectric strength calculation is crucial for designing electrical insulation systems, selecting appropriate materials for high-voltage applications, and ensuring electrical safety in various industries.

4. Using the Calculator

Tips: Enter breakdown voltage in volts (V) and thickness in meters (m). All values must be valid (voltage > 0, thickness > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is dielectric breakdown?
A: Dielectric breakdown is the failure of an insulating material to prevent the flow of current under high electric stress, resulting in a sudden increase in conductivity.

Q2: What are typical dielectric strength values?
A: Dielectric strength varies by material. Air has about 3×10⁶ V/m, while materials like polyethylene can have 20×10⁶ V/m or higher.

Q3: How does temperature affect dielectric strength?
A: Generally, dielectric strength decreases with increasing temperature as thermal energy facilitates breakdown processes.

Q4: What factors influence dielectric strength measurements?
A: Electrode geometry, voltage waveform, material homogeneity, temperature, and humidity all affect measured dielectric strength values.

Q5: Why is dielectric strength important in practical applications?
A: It determines the minimum insulation thickness required for electrical components, ensuring safe operation and preventing electrical failures.