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Better to know to a 500 kva compact substation

2024-03-26

500 kva compact substation also can be called 500 kva mini substation. As its name, the 500 kva mini substation has a compact structure design, which has high voltage control unit, low voltage control unit, and transformer unit to tightly connect by copper busbar or cables, that is convenient to install and test.

Conso Electrical Science and Technology Co., Ltd is one of the most professional manufacturer to produce 10 kv to 35 kv compact substation, distribution transformer and vacuum circuit breaker. Conso Electrical has accumulated experience of quality management from transactions of clients since 2006.


Table of the Content

1.What is the purpose of the 500 kva compact substation?

2.What is the difference between a 500 kva distribution transformer and a 500 kva compact substation?

3.What is the main components in a 500 kva compact substation?

4.What cable is required for a 500 kva compact substation?

5.How to choose copper busbar for a 500 kva compact substation?

6.A 500 kva compact substation for sale.


What is the purpose of the 500 kva compact substation?

A 500 kva mini substation equips controlling and protecting unit on both primary and secondary voltage side. The purpose of a 500 kva compact substation is to distribute electricity in three phase AC power grid.

A 500 kva compact substation is a miniaturized electrical facility, which has a competitive advantage on testing and installing to electricity users, who need more free space on the limited land usage, such as central business district, and shopping mall.

However, the structure of a 500 kva pad mounted transformer is more reasonable than a 500 kva compact substation on designing, as the 500 kva pad mounted is more convenient to ship.


What is the difference between a 500 kva distribution transformer and a 500 kva compact substation?

Both of 500 kva distribution transformers and 500 kva compact substations play an important role in electricity transmission and distribution. However, a 500 kva compact substation is a comprehensive solution to industrial, residential and commercial electricity demands.

Obviously, a 500 kva compact substation is a facility combined controlling and protecting unit with a 500 kva distribution transformer. Ever more, users could add some extra functions on a 500 kva compact substation such as global positioning, electricity data uploading, and etc.

However, a 500 kva distribution transformer could support multiple options. It could be mounted on electricity poles with low voltage switchgear, surge arrester, cutout fuse and insulators, or installed in a distribution room with high and low voltage panels.

What is the main components in a 500 kva compact substation?

Normally, a 500 kva compact substation equips a 500 kva distribution transformer, primary and secondary voltage control panel, compensation cabinet, DTU panel, and DC panel. The following is the function of each equipment:

A 500 kva distribution transformer: step down or step up voltage from the primary side to the secondary side.

Control panel: distributing electricity through circuit breakers, metering electricity consumption, supporting AC control power, and supporting necessary protection, such as under voltage protection, earthing protection, and over current protection.

Compensation cabinet: increasing available electricity to the 500 kva distribution transformer, reducing the workload to the 500 kva distribution transformer, saving electricity to the terminal user.

DTU panel: monitoring electricity quality, transferring electricity characteristic to data center.

DC panel: supporting direct current power.

What cable is required for a 500 kva compact substation?

Normally, the high voltage switchgear will connect to the distribution transformer through input cables in a 500 kva compact substation. The bellowing table shows the rated current of cables in different working environment:

Mode YJV, YJLV, YJY, YJLY, YJV22, YJLV22, YJV23, YJLV23, YJV32, YJLV32, YJV33, YJLV33 YJV, YJLV, YJY, YJLY
Cores number Three core Single core
Laying In air In earth In air In earth
Arrangement method of single core

Horizontal Layered Horizontal Layered
Conductor material Rated Current (A)
Cu Al Cu Al Cu Al Cu Al Cu Al Cu Al
 Nominal cross-section (mm2) 25 120 90 125 100 140 110 165 130 150 115 160 120
35 140 110 155 120 170 135 205 155 180 135 190 145
50 165 130 180 140 205 160 245 190 215 160 225 175
70 210 165 220 170 260 200 305 235 265 200 275 215
95 255 200 265 210 315 240 370 290 315 240 330 255
120 290 225 300 235 360 280 430 335 360 270 375 290
150 330 225 340 260 410 320 490 380 405 305 425 330
185 375 295 380 300 470 365 560 435 455 345 480 370

Take the YB22-10/0.4-S11-500 compact substation as an example, the YJV22-8.7/15-1*35 shall be used as the input cable in the 500 kva compact substation.

How to choose copper busbar for a 500 kva compact substation?

Normally, the low voltage switchgear will connect to the distribution transformer through copper busbar. In a 500 kva compact substation, the engineers of Conso Electrical will take TMY-3*60*6 as the main busbar, and TMY-1*40*4 as natural busbar and PE busbar.

A 500 kva compact substation for sale.

Normally, a 500 kva compact substation would cost about $15000~$25000 on manufacturing. The costs is waving because a 500 kva mini substation is designed according to the electricity demands from clients, such as the metering unit is alternative on primary side or secondary side. In this case, Conso Electrical will not keep storage of compact substations, which means each compact substation sold is brand new in Conso Electrical.

Conso Electrical is one of the original manufacturer to produce 10 kv to 35 kv distribution transformer, compact substation, vacuum circuit breaker in Central industry park of Yueqing, Zhejiang province, China. The factory strictly executes the standard of ISO 9001, ISO 14001, and ISO 45001 since 2006.

Each components of a 500 compact substation will be inquired. Until those components are combined to a 500 compact substation, a series of factory test will run to the 500 kva distribution transformer, primary voltage panel, and secondary voltage panel. Meanwhile, the structure of substation shell will have an extra inquiry by the specialized engineer.

Conso Electrical has the abundant experience to manufacture and supply 10 kv to 35 kv distribution transformer and compact substation to oversea clients. The company aims to develop a stable relationship with clients.

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