Conductive Immunity Testing

What is the EFT immunity test?

There are a variety of electrical conditions that can negatively affect the performance of your device. That is why Testing Partners undertake a variety of immunity testing so that your device can function regardless of the environment.

The Electrical Fast Transient immunity test attempts to replicate realistic inductive load switching by using either direct or capacitive coupling. The type of test used will depend on whether your product has power, a signal port, or both. We’ve included several examples of inductive load switches that may impact your product:

  • Solenoids
  • Motors
  • Switch contactors
  • Relays
  • Actuators

What is the Surge Immunity Test?

The goal of surge immunity testing is to mimic low-frequency surges. We have included several real-world examples of low-frequency surges:

  • Flyback voltage spike
  • Power grid insulation defects
  • Indirect Lightning

What is the Conducted Susceptibility Test?

Conducted susceptibility tests simulate RF noise superimposed on power lines and IO signal lines. During this test, we use Bulk Current Injection (BCI) and Coupling De-coupling Networks (CDN) to simulate conducted susceptibility. 

What is the Voltage Dip, Short Interruption, and Voltage Variation immunity tests?

  • Voltage dip: tests for voltage drops. Typically, these are caused by failures in the electrical grid, the product installation, or a significant spike in electrical load.
  • Discontinuities: These check for breaks in the voltage to the device. This is induced by the operation of automated reclosing systems.
  • Voltage variations: This tests for constant changes in voltage delivered to the device. This simulates continuously changing loads to the electrical grid.
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