Calculation of electrical loads. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Electrician

Calculation of electrical loads. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

The design load of the group lighting network of premises of residential buildings (stairwells, subfloors, basements, attics, residential premises) should be determined by lighting calculation with a demand factor equal to one.

The estimated load of supply lines, inputs from electrical receivers of houses Rkv is determined by the formula:

Calculation of electrical loads

where Rkv ud - the specific load of electrical receivers of houses is taken depending on the number of houses connected to the overhead line, the type of stoves (1-3 houses - 2,5 kW per house, 6 houses - 1,5 kW, 9 houses - 1,1 kW, 12 houses - 0,9 kW, 15 houses - 0,7 kW, 18 houses - 0,7 kW); Rkv cond - specific design load of domestic air conditioners (kW); n is the number of houses attached to the line.

The design load of a residential building Rrzhd is determined by the formula:

Calculation of electrical loads

where Rkv is the calculated load of electrical receivers of apartments (kW); Рс - design load of power receivers (kW).

The calculated power factors of the lines supplying houses are taken equal to 0,98, and those supplying household pumps - 0,85.

Specific design loads are given for apartments with a total area of up to 55 m2. With a total area of apartments more than 55 m2, the specific load should be increased by 1% for each square meter of additional area in houses with natural gas stoves and by 0,5% in houses with electric stoves.

Author: Korshevr N.G.

See other articles Section Electrician's Handbook.

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