Common Misunderstandings About AIGCS in OLTC Applications
People use Automated Inert Gas Conservation Systems (AIGCS) in On-Load Tap Changers (OLTCs) to manage the insulation gases generated during tap-changing operations. These systems significantly improve safety and reliability, but they’re still widely misunderstood.
These misunderstandings can lead to incorrect usage, poor maintenance decisions, and reduced OLTC performance.
Let’s clear up some of the biggest myths about AIGCS in OLTCs—and explain how these systems really help keep transformers running smoothly.
Misunderstanding 1: “AIGCS means you never need oil maintenance.”
That’s not true. While AIGCS controls gas buildup effectively, it does not replace oil filtration or testing. Most gas formation is still caused by oil degradation and arcing.
Reality: AIGCS works best when paired with regular oil filtration and oil condition monitoring.
Misunderstanding 2: “Only big transformers need AIGCS.”
Many assume AIGCS is meant only for large, high-capacity transformers. In reality, every OLTC—regardless of size—experiences arcing and gas generation.
Reality: Medium-capacity and distribution transformers also benefit from AIGCS, especially in networks with frequent voltage fluctuations.
Misunderstanding 3: “AIGCS constantly injects gas.”
Some believe AIGCS continuously injects inert gas, increasing oxidation risks.
Reality: Modern AIGCS systems—such as those from EMR Global—inject controlled, minimal amounts of inert gas only when pressure or gas levels cross defined limits, keeping oxidation under control and protecting insulation.
Misunderstanding 4: “AIGCS prevents all OLTC failures.”
AIGCS is powerful, but it isn’t a cure-all. It cannot prevent failures caused by worn contacts, mechanical fatigue, or poor-quality replacement parts.
Reality: AIGCS is one layer of protection. Regular inspections, genuine spares, and timely servicing are still essential.
Misunderstanding 5: “AIGCS needs constant supervision.”
Some assume AIGCS systems are complex and require constant manual intervention.
Reality: Modern AIGCS installations are automated, self-regulating, and equipped with alarms and diagnostics for easy monitoring.
Why This Matters
Misunderstanding how AIGCS works often leads to underutilization or improper maintenance—raising the risk of OLTC failure.
When applied correctly, AIGCS helps you:
Improve OLTC performance
Extend insulation life
Reduce unexpected outages
Enhance operational safety and reliability
Why Trust EMR Global?
EMR Global offers proven AIGCS solutions, OLTC spares, retrofit kits, and expert transformer services. When used correctly and supported by proper maintenance, EMR’s AIGCS systems help OLTCs operate safer, steadier, and more reliably.
Reach out to EMR Global and take the next step in protecting your transformers.
