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Maximum demand indicator

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Maximum Demand Indicator (MDI) is an instrument for measuring the maximum amount[clarification needed] of electrical energy required by a specific consumer during a given period of time.[1] MDI instruments record the base load requirement of electrical energy. They can also measure the peak load, but are unable to record sudden short circuit or high motor starting currents.

The main parts of MDI are:

  1. Dial connected with moving system
  2. Pointer on dial
  3. Reset device
  4. Fraction device
  5. Indicating pin

MDI is often available as a built-in feature of three phase energy meters.

Maximum demand is calculated as: Maximum Demand(KW)=Maximum Energy Recorded(KWh)⁄Time(hours)

References

  1. ^ Electrical Instruments & Measurements. Pakistan: Allied Book Center Urdu Bazar Lahore. 2002. p. 461.

maximum demand meter indicates maximum demand KVA consumed by the consumer in a specific period of time. Usually it helps to utility to create a bill for consumer for payment

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