WLM1 circuit calculation in cabinet 1AN-1

The three-phase load balance of this main line can be calculated based on three phases:

Pe=26*6=156KW

Kx=0.7 (24 households in three-phase)

Pjs=109KW

cosφ=0.9

ljs=184A

WLM2 and WLM1 circuits are the same

WLM3 circuit calculation in cabinet 1AN-1

The three-phase load balance of this main line is calculated based on three phases:

Pe=26*3=78kW

Kx=0.95 (12 households in three-phase)

Pjs=74Kw

cosφ=0.9

ljs=124A

Load calculation for cabinet 1AN-1

The three main lines are all three-phase load balanced, and the load of the distribution cabinet is also three-phase balanced.

Calculate according to the three-phase formula:

Pe=156+156+78=390KW

Kx=0.5 (60 households in three-phase)

Pjs=195KW

cosφ=0.9

ljs=328A

At this point, the total incoming line can be set to 350A. However, according to the regulations of the local power supply bureau, the set current of the incoming line of the distribution cabinet should not exceed 320, so a coefficient of 0.45 is taken (this coefficient is between the general value and the applicable value). Set to 320, which is close to calculating the current

Each main line can support six floors to ensure full load. If one cabinet can only carry two main lines, five distribution cabinets are required. (10 main lines)

To adjust the local mainline load to make the distribution cabinet fully loaded, a four sided distribution cabinet is required. (12 main lines)