Testing Device, Overcurrent Protector, and Method of Testing an Overcurrent Protector

A system comprising:

• an overcurrent protector configured to interrupt a current between first and second terminals when the current exceeds an overcurrent threshold;
• and
• a testing device configured to test whether the current exceeds the overcurrent threshold, the testing device comprising:
• a first switch configured to switch to a test position for connecting the first terminal to a first capacitor;
• a second switch configured to switch to a test position for connecting the second terminal to a second capacitor;
• a pre-charging circuit configured to charge the first capacitor to a first voltage and charge the second capacitor to a second voltage, the second voltage being lower than the first;
• and
• a controller configured to switch the first and second switches to the test positions for establishing a current path for the current to pass through the overcurrent protector from the first capacitor to the second capacitor,
• the first and second voltages are selected to generate a peak current in the current path greater than the overcurrent threshold.

A method comprising:

• testing a current between first and second terminals of an overcurrent protector that is configured to interrupt the current when the current exceeds an overcurrent threshold, the testing comprising:
• pre-charging, using a pre-charging circuit, a first capacitor to a first voltage and a second capacitor to a second voltage, wherein the second voltage is lower than the first;
• and
• controlling, using a test device, first and second switches to operate in test positions for connecting the first and second terminals to the first and second capacitors for establishing a current path for the current through the overcurrent protector between the first capacitor and the second capacitor,
• wherein the first and second voltages are selected to generate a peak current in the current path greater than the overcurrent threshold.