DIN Electrical installations in residential buildings – Part 1: Planning principles. standard by Deutsches Institut Fur Normung E.V. DIN DE. Elektrische Anlagen in Wohngebäuden – Teil 1: Planungsgrundlagen (Foreign Standard). Diese Norm gilt für die Planung von. Draft standard DIN – Draft. Electrical installations in residential buildings – Part 1: Planning principles. German title: Elektrische.
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Data underlying the calculations according to Table While such a high power is needed for just a few minutes per day, the requirements for larger conductor cross sections are the same as would be for permanent load.
But let us have one more look at the riser supplying a single home, a few or a multitude of homes. Even if the mentioned guesswork should be by a whole magnitude in error, this would not change anything about the result.
The office Attempt to diin a method The multi-family home The single-family home Example 1: In fact, every storey takes away its part of the load, and the last section is loaded only more with the current of two flats. We must now look at how the expenditure required for this can be kept within reasonable limits.
With all care that has to be taken with respect to the assumptions and simplifications made, the following results become obvious: Hence, the force to design the 180015-1 to the peak of the occurring load is not really a cost driver but rather a piggy bank, viewed across the lifespan, adding erection and loss costs!
Since the office has been in operation for 33 years already, an additional initial investment for conductors upsized to 2. Proposal for a method Cable efficiency helpers Outlook. Fortunately a helpful colleague had been prepared to restore the lost data underlying the diagram Fig. A different approach, however, would have resulted in preposterously short line lengths in the top part of the table, which would have been just as unrealistic.
Deutsches Kupferinstitut: Cable efficieny method
This result is particularly astonishing if you consider that the 1. An assessment 188015-1 be found for each individual cable. Introduction Approach 1 Approach 2 Attempt to develop a method Result: With all care that has to be taken with respect to the assumptions and simplifications made, the following results become obvious:.
From a qualitative point of view let us stay with simplifying approach 2, of transferring the load profile that is valid for the system in question to the final circuits. What was newly introduced into the table here is the column with the line losses W L occurring in the riser, calculated with the respective line lengths l select.
Electrical installations in residential buildings – Part 1: Planning principles
In other words, this is the root from the quotient of the least uniform by the most uniform load distribution across the year and across the circuits that is at all possible. Oberschwingungen Definitionen Spannung oder Strom? The installation method be B1 again. The calculation for the domestic washing machine from Tables 1 and 2 had produced 20 years. These result in payback times of 7 and 6 years, respectively. Only they are not sufficient to create a methodology for determining this optimum.
Special contract customers Anomalies, characteristics, further action Example 2: It is also dib in the tables but has already been included in the calculation of the table. Maximum and selected cable lengths; annual losses without electrical warm water supply.
Over the rest of the day, this larger cross section then reduces the losses. Applying the 180155-1 procedure to the office from Table 4 turns the table straight away. A creative assumption is required again here, for so long already two calculation models are at hand: In this particular case, however, the result also means that a practicable potential energy saving — as expected — hardly exists in relation to 1801-1 final circuits of private homes.
Regarding the quantification of line losses, this brings about the question which line length to assume. Fluorescent Magnetic ballasts principle Magnetic ballast disturbances Compensation Electronic ballasts principle Electronic ballast disturbances Fluorescent lamp efficiency Leuchtstofflampen-Quecksilber. Maximum and selected cable lengths; annual losses with electrical warm water supply. This latter observation may be confusing at first sight, since electrical warm water supply, where installed, will let a lot more energy rise up the riser!
However, the synthesis of the two can be 18051-1 further: Obviously, no relevant difference is seen by grid planners between this and an infinity of users. Of course, the same load profile as for the one and only flat in the first line of the table was also applied to the respective riser.
So one ought to calculate with half the load as a mean or, alternatively, with half the real length, neither of which was done here. The riser need not be optimized anymore because it has already been energy optimized, although not for energy efficiency but other — compelling — reasons. An individual dwelling — in effect a single-family home — causes losses worth around 40 cents annually.
In the first example Table 3 the factor F L is very high, since the junction box is only fully utilised on rare occasions on an annual average basis: Using a relative indicator, e. Good as it is so far, but now how to arrive at the losses?
Due to the relatively coarsely tiered standard sizes and due to the abrupt leap of the voltage drop from 0. At least this is what things look like inside an apartment, independently on whether this apartment is located in a single-family building or in a condominium. However, the synthesis of the two can be developed further:.
The effect of the thermal heat that increases over-proportionately if the current is uneven is balanced out by correction factor F F of the load profile in question. In that way a method of finding the conductor cross-section with the lowest practical life cycle costs could be found. In the first example Table 3 the factor F L is very high, since the junction box is only fully utilised on rare occasions on an annual average basis:.
This being so, the estimate is quite likely to be still too high, since all risers have been calculated as being loaded with the entire current drawn by the building.
Further arguments like resource savings and CO 2 reduction would still come on top — if not then, now they would.