let's see, short circuit rating of the switchgear current

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Short Circuit Control in Cogeneration | How to Control Short Circuit Levels When Adding Generators

How do you control short circuit levels when adding new generators to a cogeneration system?
In this video, we explain how short circuit levels rise during generator additions — and more importantly, how to control short circuit levels to stay within switchgear design ratings.

As cogeneration plants expand, more generators are added to the system. But each addition increases the short circuit current contribution at the switchgear terminals, potentially exceeding the equipment’s withstand capacity.

In this technical tutorial, we cover three proven ways to mitigate short circuit levels:

Series Reactors – reduce fault current but cause real power losses and voltage drops.

Unit Ratio Transformers – helpful but lead to reactive losses and may demand more space.

IS Limiters (Fault Current Limiters) – effective, but may cause issues like unwanted generator or load disconnection during fault scenarios.

Each method comes with trade-offs. That’s why short circuit studies are essential before choosing any solution. We discuss how to approach short circuit control systematically to ensure both reliability and equipment safety.

This video is valuable for anyone working in:

Power system protection

Cogeneration design

Switchgear upgrade projects

Short circuit analysis

Whether you're a consultant, utility engineer, or EPC professional, learning how to control short circuit levels during generator additions is critical to your project success.


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