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Reference.org
Maximum demand indicator
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<p>Maximum Demand Indicator (MDI) is an instrument for measuring the maximum amount of electrical energy required by a specific consumer during a given period of time. MDI instruments record the <a href="/facts/Base_load/lRt7vzvw">base load</a> requirement of <a href="/facts/Electrical_energy/V0pJUrDY">electrical energy</a>. They can also measure the <a href="/facts/Peak_load/FLuSxGpu">peak load</a>, but are unable to record sudden <a href="/facts/Short_circuit/r09vaaeQ">short circuit</a> or high motor starting currents. </p><p>The main parts of MDI are: </p> <ol><li>Dial connected with moving system</li> <li>Pointer on dial</li> <li>Reset device</li> <li>Fraction device</li> <li>Indicating pin</li></ol> <p>MDI is often available as a built-in feature of <a href="/facts/Electricity_meter/08C83Imq">three phase energy meters</a>. </p><p>Maximum demand is calculated as: Maximum Demand(KW)=Maximum Energy Recorded(KWh)⁄Time(hours) </p>