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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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. In this particular case, however, the result also means that a practicable potential energy saving ein as expected — hardly exists in relation to the final circuits of private homes.

With all care that has to be taken with respect to the assumptions and simplifications made, the following results become obvious:. Good as it is so far, but now how to arrive at the losses? Of course, 180155-1 same load profile xin for the one and only flat in the first line of the table was also applied to the respective riser.

Deutsches Kupferinstitut: Cable efficieny method

18051-1 However, the synthesis of the two can be developed further:. Obviously, no relevant difference is seen by grid planners between this and an infinity of users. Due to the relatively coarsely tiered standard sizes and due to the abrupt leap of the voltage drop from 0.

In that 1801-1 a method of finding the conductor cross-section with the lowest practical life cycle costs could be found. But let us have one more look at the riser supplying a single home, a few or a multitude of homes.

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However, the synthesis of the two can be developed further: Using a relative indicator, e.

These cin in payback times of 7 and 6 years, respectively. 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! Over the rest of the day, this larger cross section then reduces the losses. Analogous investigations should now be carried out for the other load profiles.

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Electrical installations in residential buildings – Part 1: Planning principles

If upgrading the conductor cross-section from 1. The riser need not be optimized anymore because it has already been energy optimized, although not for energy efficiency but other — compelling — reasons.

We must now look at how the expenditure required for this can be kept within reasonable limits. Special contract customers Anomalies, characteristics, further action Example 2: An assessment must be found for each individual cable.

Proposal for a method Cable efficiency helpers Outlook.

Applying the same procedure to the office from Table 4 turns the table straight away. The installation method be B1 again. 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.

Fluorescent Magnetic ballasts principle Magnetic ballast disturbances Compensation Electronic ballasts principle Electronic ballast disturbances Fluorescent lamp efficiency Leuchtstofflampen-Quecksilber. 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.

We see that the payback periods — dib for only one standard size up — rise to values of 30 or 25 years, respectively.

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According to Approach 1 Table 3 or Table 4, respectivelythis factor corresponds to the relevant geometric average between the smallest possible and the greatest possible current. The office Attempt to develop a method The multi-family home The single-family home Example 1: Cynics may claim this was common practice anyhow.

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. 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.

What 81015-1 newly introduced into the table here is the column with the line losses W L occurring in the riser, calculated with the respective line 1015-1 l select.

Maximum and selected cable lengths; annual losses without electrical warm water supply. It is also listed in the tables but has already been included in the calculation of the don. Further arguments like resource savings and CO 2 reduction would still come on top — if not then, now they would. An individual 1015-1 — in effect a single-family home — causes losses worth around 40 cents annually. Since the office has been in operation for 33 years already, an additional initial investment for conductors upsized to 2.