The Maximum Demand Indicator (MDI) is a device that measures the maximum amount of electrical energy consumed by a single user over a certain time period. The base load need of electrical energy is recorded using MDI devices. They can also record peak load, but not unexpected short circuits or high motor starting currents.
How can we stay away from MDI?
- If your power factor is less than 1, you can increase your output kW per KVA supplied by boosting your power factor, as previously discussed. This ensures that you do not waste any of the kVA provided by your utility.
- If your power factor is one, it signifies that your appliances are utilizing more kW or kVA than you have purchased. To address this, you can either upgrade to more efficient appliances (consuming less kW) so that your total demand meets demand, or you can ask your utility to enhance the maximum demand granted to you if you believe you have the most efficient appliances.
- Another way to avoid the MDI penalty is to move your peak load to a time when your load is lower. A Thermal Storage system, for example, can assist you shift your air conditioning load from day to night. A thermal storage device is a device that stores thermal energy, similar to a battery. This can be charged at night and used during the day to replace air conditioners.
What is an example of a high-demand electricity bill?
Monthly Maximum Demand Charge (LKR/kVA) This rate applies to supplies delivered and metered at 400/230 Volt nominal at each individual point of supply if the contract demand exceeds 42 kVA.
What is the definition of a maximum demand meter?
The maximum demand meter is used to monitor thermal loads in Power Distribution systems, Networks, and Machines, among other applications. It shows the maximum loading current over a given time period. Current peaks for a short period of time are not recorded, but long overloads are. The measuring current of the Maximum Demand meter runs through a temperature-sensitive bimetal spiral. A black measuring marker is connected to the spiral’s free end. The heat generated by the current passing through the spiral activates the moving system. An additional red slave pointer with a stronger friction is included in the instrument, allowing it to remain in its maximum position, which determines the maximum average loading current. The red pointer is dragged along with the black pointer by the strong torque of metallic movement. At the maximum value, the red pointer remains immovable. The knob on the front facia can be rotated to reset this. To compensate for temperature variations between 10 and +55 degrees Celsius, an additional bimetallic spiral is coiled in the opposite direction and installed on the same spindle to prevent misleading indication owing to fluctuations in ambient temperature. When it’s necessary to measure instantaneous current at the same time, a moving iron movement with the same range is included in the same meter.
What does the term “demand factor” mean?
Demand factor is defined as the ratio of the maximum demand on an electric-power system during a certain period to the load actually connected during that period, expressed in percent.
What is MDI’s full form?
MDI (Many Document Interface) is a Microsoft Windows programming interface that allows you to create an application that allows you to deal with multiple documents at once. Each document is in its own space, with its own scrolling controls. By simply dragging the pointer from one space to another, the user can see and work with different documents such as a spreadsheet, a text document, or a drawing space.
Because both have several viewing places, an MDI application is similar to the Windows desktop interface. The MDI viewing spaces, on the other hand, are limited to the application’s window or client area. Each document is shown in its own child window within the client area. MDI applications can be used for a variety of tasks, including working on one document while referring to another, viewing multiple presentations of the same information at the same time, viewing multiple Web sites at the same time, and any other task that requires multiple reference points and work areas at the same time.
What is the purpose of the PF penalty charges on my electricity bill?
When a customer’s power factor falls below a certain threshold, usually between 80 and 90 percent, an electric rate may include additional costs. This is known as a power factor penalty because it is a penalty applied on a customer’s electrical bill for a power factor that is less than optimal.
