This is the calculation of the maximum demand for a defined interval (usually every 15 minutes). Once the data is recovered, the value is saved and a reset is performed to start a new calculation for the next 15 minutes. These 4 registers are measured every hour. The locations where the meter is installed and MDI data may be available through the meter. In these places, the contractual charge is decided according to the agreement between the official and the consumer of the department depending on the installation of the electrical equipment. However, the maximum demand® displayed on the meter must not exceed the permitted contractual load. In this case, the counter automatically displays the maximum MD/MDI request. The consumer cannot hide the maximum demand or the contractually agreed demand. The contractually agreed demand must not be less than the maximum demand of the MDI/MD/maximum meter. If you own an office or store and receive electricity through a commercial connection with a charge greater than 20 kW, you have heard of power factor penalties and/or application fees. Have you ever wondered what the power factor penalty means or what the application fee is? Have you ever paid something called an MDI penalty (or maximum demand indicator)? These are the terms used in trade relations in different parts of our country, but very few people understand what they are. If you want to understand what it is and how to avoid them, then this article will definitely help you understand the same. To determine the contractually agreed load / sanctioned load, the department engineer visits the consumer`s premises and adds all connected loads on the premises at the consumer`s request, in this case, the contractually agreed load is considered 50% of the connected load.
. Because the household factor has a diversity factor of 50%, which means that not all electrical appliances are turned on by the consumer at the same time. For this reason, it is believed that in the home connection, more than 50% of the electrical equipment is not turned on at the same time. It is therefore assumed that the load contracted in the connection of the house is 50% of the connection load. As the graph shows, the user pays a 20% increase in the maximum duration of the request if the maximum value of the request exceeds 10% of the contractually agreed service. However, if the maximum value of the request exceeds 20% of the contractually agreed service, the user pays a 50% increase in the maximum duration of the request. The contractually agreed load is determined on the basis of the sum of the load(s) of the connected electrical equipment in the premises and types of the category (such as a commercial, industrial, agricultural household), e.B. the contractually agreed load in the domestic connection must be 50% of the connection load, just as the contractually agreed load in the commercial connection must be 75% of the connection load. Similarly, in the case of industrial and heavy connections, the contracted load must be 100% of the connection load. Typically, electricity bills compare the highest maximum demand value recorded by the meter with the contractually agreed generation. Whenever this value is higher than the contractually agreed power, there will be an economic penalty. Therefore, if during the billing month the service exceeds the contractually agreed service, the customer pays a penalty for a period of 15 minutes, even if it is exceeded only once a month (a month has about 2880 periods of fifteen minutes).
If the maximum demand is exceeded, what effect will occur on the EB side. As we have progressed, the objective of maximum demand control is not to exceed the contractually agreed service limit. To archive this goal, we recommend that you install a system that can separate non-critical loads over different periods of time and avoid connecting loads at the same time to reduce instantaneous performance. Maximum duration of demand Increase according to the contracted power overrun (Spain – for tariffs 3.0 and 3.1) In addition, MDC 4 includes an internal power analyzer to calculate the maximum demand (it also records electrical parameters such as voltage, current and power). Whenever the MDC 4 detects excess power, multiple lines with non-critical loads are disconnected, automatically reducing instantaneous power. This ensures that the system does not exceed the maximum demand limit and thus avoids penalties for the next electricity bill. Maximum request duration or maximum demand indicator (MDI)Maximum load register (kW or kVA). This is the maximum performance value, usually the average of 15 minutes, achieved during the billing period (this average duration may vary by country). As soon as the value is higher than the contractually agreed service, the customer pays a penalty on the electricity bill. If the connection request is made by the consumer, the rated power KW of all electrical equipment installed in industry is added up and its sum is called contracted load / / sanctioned load, that is, in the case of industry and agriculture, the entire load is connected to the site, as well as the contractual load there. MDC 20 is a data logger with a built-in web server designed to control and control maximum demand. Its versatility allows the user to perform basic or advanced configurations.
MDC 20 manages non-critical loads to ensure that the maximum demand value never exceeds contractual performance, avoiding penalties for excessive performance. If we talk about contracted load, two types of cases will occur: this is the calculation of the maximum demand during a defined interval (usually every 15 minutes). Once the data is recovered, one minute wait to start a new calculation of 15 minutes (this time may vary depending on the country). This means that every minute (this time may depend on the meter), a maximum demand value of the last 15-minute period is recorded. These 60 registers are measured every hour. The main objective of the new CIRCUTOR MDC series is to manage and control the maximum demand of an installation. To achieve this goal, the device connects and disconnects certain (non-critical) loads to ensure that the maximum demand is never greater than the contracted power, thus avoiding surprises in the electricity bill. In addition, the expanded MDC 20 series allows tariff control to adjust connection charges in lower price periods, thus avoiding high consumption due to the simultaneity of charges during periods of high tariff prices.
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