Demand charges typically constitute 30–60% of a commercial/industrial electricity bill. For example:
A packaging plant with:
of the largest circuit (like the main cooking range) and adds only of the remaining circuits. Specific Allowances : For lighting, he might only count of the total demand, knowing not every bulb is always on. Summing the Phases maximum demand calculation
To better understand how diversity factors prevent over-scoping, consider how power fluctuates over a Summing the Phases To better understand how diversity
To calculate maximum demand accurately, engineers rely on three fundamental concepts: 000 annually in wasted demand charges.
Most commercial tariffs include a kVA demand charge (e.g., $15 per kVA per month). An accurate MD calculation allows you to negotiate a lower contracted capacity with the utility. Overestimating by 200 kVA could cost you $36,000 annually in wasted demand charges.