What is Surge Testing?

What is Surge Testing?

Surge testing (Surge Test), also known as impulse testing or transient overvoltage testing, is an electromagnetic compatibility (EMC) test used to evaluate the ability of electrical or electronic equipment to withstand high-voltage transient pulses. These transient pulses are typically caused by power grid switching operations, lightning induction, or the start-up and shutdown of high-power equipment.

Purpose of Surge Testing

To verify the anti-interference capability and reliability of our sensors under power surge conditions, ensuring compliance with IEC 61000-4-5 and suitability for outdoor or high-EMI environments.

Test Standards and Levels

Surge immunity levels are defined by IEC 61000-4-5, with each level indicating the maximum surge severity the equipment can withstand.

Test Procedure

Power port test (DC 24 V supply): The surge is injected into the power terminals through a coupling network (±500 V, ±1 kV, ±2 kV).

Operating steps:

The device is connected to a PC via RS485, powered on, and communication with the host software is established.

±500 V, ±1 kV, and ±2 kV surges are applied sequentially between (L-N), with an interval of 60 seconds per application.

Record whether restart, damage, or output deviation occurs.

After testing, each sample undergoes one forward and one reverse linearity test, and the data are recorded.