What Is Interlocking in Substations, and What Is It For?
The primary objective of interlocking is to prevent hazardous situations, such as energizing an earthed circuit or operating isolators under load.
Image for illustration purposes.
This article provides a comprehensive overview of interlocking in substations, covering its definition, purpose, and key equipment involved, such as isolators, circuit breakers, and earth switches. It explains the various types of interlocking and their practical applications in line bays and busbar systems.
The role of GOOSE messaging in IEC 61850-based interlocking is also discussed, illustrating how modern substations achieve faster, more flexible, and more efficient protection and control.
Readers will gain valuable insights into how interlocking enhances safety, system reliability, and operational efficiency in substations.
Source: Electrical Engineering Portal
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