Transcript

HiPot Safety Test Overview

And we’re ready for our next Bolt test, and today we’ll be testing the Bolt HiPot withstandability. This is a safety test to make sure that the Bolt keeps the user safe.

In a HiPot test, we apply thousands of volts across the isolation barrier of the Bolt. We have a special voltage input lead that connects all the voltage inputs together to one connection that goes to one side of the HiPot tester. And then the user-accessible USB and CT connector has a connector that has all the lines shorted together to the other side of the HiPot tester.

Test Standards and Requirements

We apply 4,000 volts across this Bolt barrier, which is optically isolated, and we check to make sure there’s no leakage current. We’re testing in accordance to UL61-1010, and because this is a category 3 600-volt environment that the Bolt can be placed in, that calls for a 4,000-volt test lasting one second across the barrier. The Bolt is allowed a half a milliamp of leakage current during that test.

Performing the Test

So we’ll connect the Bolt to this. We’ll have the voltage on one side, the CT and USB connector on the other side. And we have our HiPot tester set to 4,000 volts for one second. We’ll apply this test voltage.

Test Results

And we have .048 milliamps of leakage current, so 1/10th of the allowed limit. The Bolt is now shown to be perfectly safe. The user is safe if they are touching the accessible side, even in the face of transients on the voltage input side.