The Difference Between Hot and Critical: Using NETA Standards in Thermal Audits

When we conduct a thermal audit, we don’t just tell you something is “hot.” We provide a precise, objective assessment of the fault’s urgency based on industry-recognized standards. Our reports utilize the **NETA (International Electrical Testing Association) maintenance standards** to classify faults, transforming temperature data into an actionable priority list.

I. The Objective Measure: Delta T

The core metric is the **temperature differential ($\Delta T$)**—the temperature rise of a faulty component above a similar, normal component under the same load.

• Beyond Temperature: A component at 80°C may be safe if the ambient temperature is high, but the same component at 80°C is critical if its normal temperature is 40°C. $\Delta T$ is the only reliable indicator.

II. NETA Classification for Prioritization

NETA standards provide a clear framework for defining risk based on the severity of the $\Delta T$. Our reports use this framework to guide your maintenance scheduling:

• Priority 1 (Critical): Requires immediate repair or shut down. Typically defined by a very high $\Delta T$ that indicates severe failure is imminent (e.g., risk of arc flash or fire).
• Priority 2 (Serious): Requires repair as soon as possible, often within 1-3 months. Indicates significant damage and energy loss is occurring.
• Monitor (Low Priority): Requires repair during the next scheduled shutdown. Indicates minor stress or potential future issues.

Conclusion

Our adherence to NETA standards ensures your maintenance team receives an objective, quantified priority list, guaranteeing that high-risk faults are addressed before they cause catastrophe.