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IEC 60255-21-3 Vibration, Shock, and Seismic Testing Lab

IEC 60255-21-3 Shock, Vibration, Bump and Seismic Testing 

IEC 60255-21-3 is a section of the International Electrotechnical Commission (IEC) 60255 standards that outlines the testing procedures for seismic and shock testing. Meeting the IEC 60255-21-3 shock and vibration testing requirements can be difficult. As an ISO 17025-accredited lab, we understand the challenges and guide companies through the process. 

Keystone Compliance provides the peace of mind that all of your needs will be met. When products do not meet the requirements, we assist with the troubleshooting process. We proudly partner with customers to help get their products to market quickly and efficiently. 

Request a quote to receive testing services tailored to your specific requirements. Ready to get started? We are. Contact us to see why so many companies work with Keystone each year to achieve their environmental standard test needs.

Summary of IEC 60255-21-3 Seismic and Shock Testing

IEC 60255-21-3 deals with seismic and shock tests. It specifies the requirements for relays to withstand seismic events (like earthquakes) and mechanical shocks. This part of the standard is crucial for ensuring that relays can continue to operate effectively in regions prone to seismic activity or in environments where shocks are likely. Environments include industrial settings or during transportation. Key aspects include:

  • Seismic tests that simulate the relay’s ability to withstand earthquake-like conditions.
  • Shock tests that assess the relay’s durability when subjected to sudden impacts or accelerations.

Importance of Conducting IEC 60255-21-3 Testing

Reliability Assurance: IEC 60255-21-3 ensures that relays, critical for the protection of electrical systems, can withstand extreme conditions without failure.

Compliance and Certification: Demonstrates that the product meets international standards, aiding in global market access.

Safety and Stability: Enhances the safety and stability of electrical systems, especially in areas prone to earthquakes or where mechanical shocks are a concern.

Differences Between IEC 60255-21-2 and IEC 60255-21-3

Test Focus: IEC 60255-21-2 is all about vibration testing, ensuring relays can handle continuous vibrational forces. IEC 60255-21-3 expands into seismic and shock testing, focusing on the relay’s resilience to sudden and extreme mechanical stresses.

Application Context: The tests in 60255-21-2 are generally for environments where relays are exposed to regular vibrations, such as in industrial machinery or vehicles. 60255-21-3’s tests are more about ensuring reliability and performance in the face of catastrophic events (seismic) or sudden shocks that might occur less frequently but have a high impact.

Purpose: Both parts aim to ensure the mechanical robustness and operational reliability of relays under different conditions. 60255-21-2 ensures relays can endure the sort of continuous, varying vibrations found in many operational environments. On the other hand, 60255-21-3 ensures they can also withstand the rare but potentially very damaging effects of seismic activities and mechanical shocks.

IEC 60255-21-3 Shock and Vibration Testing Requirements

Conducting tests according to IEC 60255-21-3 involves a series of specific procedures designed to assess the resilience of electrical relays to seismic and shock events. This part of the IEC 60255 standards focuses on ensuring that relays can withstand and operate reliably under the mechanical stresses that might be encountered during such events. Here’s a detailed look at how these tests are typically conducted:

Preparing for the Tests

Select Appropriate Equipment: Ensure you have the right testing apparatus, such as a shake table for seismic testing and a shock machine for shock tests.

Understand the Relay’s Operating Environment: Know the specifications and environmental conditions the relay is designed for, as this will guide the test parameters.

Set Up Test Samples: Prepare multiple samples of the relay to be tested to ensure consistency and repeatability of results.

Seismic Test Procedure

Mounting the Relay: Securely mount the relay on a shake table that can simulate the three-dimensional movements experienced during an earthquake.

Define Test Parameters: Set the parameters of the seismic event to be simulated. This includes the amplitude, frequency, and duration of the shaking, which should mimic realistic seismic activity relevant to the relay’s intended operational environment.

Conduct the Test: Activate the shake table to simulate the seismic event while continuously monitoring the relay’s performance. The relay should remain operational during and after the shaking.

Assess Results: After the test, inspect the relay for any physical damage and perform functional tests to ensure it still operates within its specified parameters.

Shock Test Procedure

Mounting the Relay: Secure the relay to the platform of a shock testing machine. The mounting should replicate how the relay is installed in its actual use case.

Define Shock Parameters: Determine the shock energy levels (measured in g’s, where “g” is the acceleration due to gravity) the relay will be subjected to. This is based on expected or standard shock exposures for the relay’s application.

Conduct the Test: The shock machine applies sudden impacts to the relay, simulating mechanical shocks. The relay is subjected to shocks in different directions to fully assess its resilience.

Assess Results: Similar to the seismic test, the relay is inspected for physical damages and tested for functional performance post-shock.

Post-Test Evaluation

Inspect for Damage: Look for any structural damage that could impair the relay’s functionality.

Functional Testing: Conduct electrical and mechanical tests to ensure the relay still meets its operational specifications.

Documentation: Record all test results, including the test conditions, any deviations from expected performance, and the condition of the relay post-testing.

Expert IEC 60255-21-3 Laboratory Shock and Vibration Testing

Keystone has a full lab of test equipment which permits us to provide short lead times on scheduling. Our team strives to give our customers more time and energy on product development instead of testing. In addition to environmental – testing, Keystone has a full scope of expertise including fungus, rain, and freeze-thaw testing. 

Ready to get started? We are. Contact us to see why so many companies work with Keystone each year to achieve their environmental standard test needs.