Which combination of factors is crucial for the successful integration of protection relays?

The successful integration of protection relays relies heavily on the effective definition of settings and thorough scenario simulation. This combination is critical because properly configured settings ensure that the protection relays operate as intended during abnormal conditions or faults, providing the necessary coordination and responding accurately to system disturbances. Scenario simulation allows engineers to test different fault conditions and operational scenarios in a controlled environment, helping to validate that the settings will perform correctly under various circumstances. This preparation reduces the risk of system failures or misoperations once the relays are integrated into the actual electrical system.

In contrast to this approach, factors like merely prioritizing convenience and cost may lead to inadequate implementations that overlook essential technical considerations. Relying solely on hardware upgrades without addressing settings and scenario testing can result in insufficient protection performance. Additionally, aiming to eliminate the need for analysis undermines the importance of understanding system behavior and ensuring reliability in protective schemes, which are critical for safe operations.