Maximum Demand Calculation Now

Review: The Critical Art of Maximum Demand Calculation

Reviewed by: Senior Electrical Engineer Subject: Application of AS/NZS 3000 / IEC 60364 & Load Estimation Software

Part 3: Methods of Maximum Demand Calculation

There are three primary ways to calculate MD, ranging from simplified rules-of-thumb to rigorous statistical analysis. maximum demand calculation

How to Implement a Load Shedding Scheme

1. Set a warning threshold at 90% of your target MD.
2. Set a trip threshold at 100%.
3. Program a PLC to disconnect non-critical loads (decorative lighting, unoccupied office outlets, secondary pumps) when the 15-minute average exceeds 100%.

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The 12-Month Rolling MD Trap

Many utilities base charges on the highest MD in the last 12 months. You could hit 2,000 kVA once during a test, and pay for that capacity for a full year. Always calculate a "target MD" that is 5-10% below your contract demand to avoid ratchet clauses. Review: The Critical Art of Maximum Demand Calculation

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