Polarity Index Calculator

Calculate Polarity Index (PI)



Formula

The formula to calculate the Polarity Index (PI) is:

\[ PI = \frac{R10}{R1} \]

Where:

Definition

Example

Let's say the insulation resistance after 10 minutes (R10) is 5000 ohms and the insulation resistance after 1 minute (R1) is 1000 ohms. Using the formula:

\[ PI = \frac{5000}{1000} = 5 \]

So, the polarity index is 5.