#35 - HIPOT – AC/DC Voltage Withstand Test

⚡ HIPOT – AC/DC Voltage Withstand Test

During AC/DC voltage withstand tests, the insulation capability of the product is also verified; however, in these tests the primary parameters are time and leakage current.

🔹 What is the difference compared to insulation resistance measurement?
– The main parameters here are: time + leakage current
– The exact resistance value is secondary
– The test is typically performed at a multiple of the rated operating voltage

🔹 DC Voltage Withstand:
– Voltage–time characteristic is similar to insulation resistance measurement
– Charging → voltage hold → discharging
– Monitoring of leakage current

🔹 AC Voltage Withstand:
– There is no point in delaying the measurement after charging
– The leakage current is continuously alternating

🔹 Standards background:
– Test voltage and duration are defined by standards
– e.g. EN 50344-1 / EN 50106
– Values are classified according to the rated operating voltage

👉 The test is considered successful if the leakage current remains below the permitted limit for the entire measurement duration.

Download 35_HIPOTACDCVoltageWithstandTest.pdf