Building construction site conventional temporary construction electricity consumption for how much?

When the total capacity of 50KW or more than 5 sets of electrical equipment, you must prepare the organizational design of electricity, that is, you said the special program

Below 50KW must be prepared to use electricity and fire safety measures.

In the civil construction part of the construction organization design, determine the construction plan of each unit of work, select the required mechanical equipment, arrange the construction schedule, you can estimate the temporary power consumption.

One estimation method is to consider the power and lighting electricity consumption of the construction site at the same time, which can be calculated according to the following formula:

S=K{(∑P1÷ηcosφ)K1K2+∑P2K3}

The representative meanings of each part of the formula are as follows:

S: the total power consumption of the construction site;

K: the standby coefficient, which generally takes K= 1.05~1.1;

∑P1: the sum of the rated output power of the power equipment of the whole construction site, KW;

∑P2: the sum of the power consumption of the lighting of the whole construction site, KW;

η: the efficiency of the power equipment, i.e., the average efficiency of the motors, generally taken as η=0.85;

cosφ: the power factor, the general use of the construction site is 0.65;

cosφ: power factor, generally taken as 0.65;

K1: all power equipment at the same time using coefficient, generally take K1=0.6 when five units, more than five units take K1=0.4~0.5;

K2: power load factor, the main consideration is not due to the nature of the different work in the load, generally take K2=0.75~1;

K3: lighting equipment at the same time using coefficient, generally take K3=0.75~1;

K3: lighting equipment using Coefficient, generally take K3 = 0.6 ~ 0.9;

Another method, if the site lighting power consumption is very small, in order to concisely calculate, can be in addition to the power consumption of power and then add 10%, as the total power consumption, which can be calculated using the following formula:

S dynamic = K1 (∑P1 ÷ ηcosφ) K2

After arriving at the total electricity, and then calculate site The formula is:

I=(Sz×1000)÷(1.73×U)

In the formula, I: represents the total current, A; Sz: represents the total power consumption of the site, KVA; U: represents the line voltage of the power supply system, U=380V.