ISOLATOR/ FUNCTION OF ISOLATOR IN SUBSTATION / AIS.

to watch this video in English:    • English: What is Isolator in substation an...  

In a switchyard or substation, an isolator is a crucial component used to electrically isolate sections of a power system. It's also known as a disconnect switch or a disconnector. Here's how it works and why it's important:

Electrical Isolation: Isolators are used to physically separate parts of an electrical circuit for maintenance, repair, or safety purposes. They ensure that a section of the power system can be safely worked on without the risk of electrical shock or damage to equipment.

Interrupting Power Flow: Isolators are capable of opening and closing electrical circuits under no-load conditions. Unlike circuit breakers, which are designed to interrupt current flow under load conditions in case of faults, isolators are primarily used for isolating equipment and lines for maintenance or repairs when there is no current flowing through them.

Visual Verification: Isolators often have visible contacts that allow operators to visually verify whether a circuit is open or closed. This visual indication helps ensure that the circuit is safely isolated before maintenance work begins.

Safety and Reliability: Isolators play a critical role in ensuring the safety and reliability of power systems. They help prevent accidents, equipment damage, and power outages by providing a means to isolate sections of the system when necessary.

In summary, isolators in switchyards or substations provide a vital means of isolating and de-energizing parts of the electrical system for maintenance, repair, and safety purposes, contributing to the overall reliability and functionality of the power grid.