STANCER

Condcuted Transient Testing

Conducted Transient testing aims to ensure that a given product can withstand short-duration electrical disturbances on power and signal lines. This testing evaluates the immunity of electronic and electrical equipment against fast voltage and current transients that may occur in real-world environments, helping prevent malfunctions, performance degradation, or permanent damage.

Benefits of Conducted Transient Testing

Reveal Hidden Weaknesses in Power and Signal Interfaces

Transient events on AC/DC power lines and communication ports can cause resets, component damage, or system instability. Transient testing exposes these vulnerabilities early, reducing costly redesigns.

 

Validate the Performance of Protective and Filtering Circuits

Transient testing puts stress on MOVs, TVS diodes, filters, SMPS controllers, and power stages to confirm that the protection and conditioning circuits behave correctly under high-energy and fast-edged disturbances.

 

Ensure Firmware and Control Logic Resilience

Transient disturbances often trigger microcontroller brownouts, logic faults, timing errors, and communication dropouts. Transient testing verifies that your embedded systems remain stable and functional under IEC/EN 61000-4 transient conditions.

 

Reduce Field Failures and Improve Product Reliability

Conducted transient testing significantly increases MTBF and reduces warranty returns by validating robustness before your product reaches customers.

 

Achieve Mandatory Global Compliance

Conducted transient tests being done in an ISO/IEC 17025 accredited Lab, provide the proof of immunity performance required for CE Marking and international regulatory approvals.

Our Process and Testing Capabilities

Our ISO 17025 accredited Lab covers the following main conducted transient tests:


IEC/EN 61000-4-4 – Electrical Fast Transients (EFT)

The objective is to test immunity to repetitive fast voltage transients typically caused by switching of inductive loads, relay contact bounce, or other high-speed switching events on power or signal lines. Our test setup is equipped with cutting-edge single-phase and three-phase coupling/decoupling networks (CDNs) with a current rating of 32 A and transient generators capable of generating EFT pulses characterized by peak values up to 7-kV and durations down to nanoseconds with high repetition rates.


IEC/EN 61000-4-5 – Surge Immunity

This aims to evaluates the equipment’s ability to withstand high-energy transients, such as those caused by lightning strikes, switching of the power grid, or large inductive loads. Surges are applied in the form of 1.2/50 µs voltage waves and 10/700 µs current waves applicable on AC mains, DC supply lines, and signal interfaces.


IEC/EN 61000-4-12 – Ring Wave Immunity
At Stancer, we leverage our testing equipment to simulate transients generated by the switching of inductive loads in industrial installations which are usually characterized by oscillatory Transient Overvoltages (TOVs). Our full-suite transient generator applies standard compliant ring-wave oscillatory transients characterized by a rise-time of 0.5 micro-second and maximum frequency of 100kHz.


ISO 7637-2 – Road Vehicle Conducted Transients
A unique capability of Stancer Testing-Lab relies on its capability for performing automotive transient tests in compliance with ISO 7637-2. This standard specifically deals with automotive applications and defines multiple pulses that replicate disturbances in vehicle electrical subassemblies (ESA). The key pulses include:


  • Pulse 1 – Voltage drops due to load switching on the supply line

  • Pulse 2a / 2b – Positive and negative voltage transients from supply line switching

  • Pulse 3a / 3b – Positive and negative voltage transients caused by load dump events

  • Pulse 4 – Fast transients generated by inductive load switching

  • Pulse 5 – Rapid voltage variations from sudden load changes

These pulses are applied to power and signal lines to verify that automotive electronics maintain functionality under realistic electrical disturbances.


ISO 16750-2:  Testing for Electrical and Electronic Equipment of Road Vehicles
Stancer Testing-Lab relies on its sophisticated testing system for performing comprehensive set of electrical tests designed to verify the robustness and reliability of automotive electronic equipment when exposed to real-world vehicle power supply conditions. These tests cover steady-state and transient supply voltage variations, including overvoltage and undervoltage, voltage drops and short interruptions, and reset behavior as well as dynamic operating conditions such as engine starting profiles, momentary voltage dips, and slow voltage changes. Testing against severe electrical disturbances including load dump, superimposed AC ripple, and repetitive transient pulses is offered by our Lab.

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