Ho Chi Minh City | Reactive power compensation

Xây Lắp Điện Quang Anh offers reduce power losses in Your company by installing reactive power compensation panel.

With this panel is possible to compensate large part of reactive power, increasing power factor of working devices up to cos φ=0,95..0,99; in the same time current and loads are reducing.

Installed the RPC cabinet, You can essentially save on the bills for electricity.

What the reactive power means?

In power networks are consumed two types of energy – active and reactive.

Active energy P (kW) – is the useful energy consumed by loads such as lamps, heaters, computers, etc.

Reactive energy Q (kVAr) – is consumed only for the excitation of the electromagnetic field in electric machines, electric motors and in transformer cores.

Power factor (P/S) is equal with cos φ

Reactive energy circulation in electrical networks leads to:

transformer overloads;
cable overloads;
additional power loss;
voltage drop;
power consumption increasing;
active power decreasing.

In order to avoid such consequences, it is necessary to create a source of reactive energy in close proximity to the load, in order to eliminate leakage of reactive energy into the network. This operation is called “power factor correction”. It involves connecting the capacitors that produce reactive power consumed by the load with the opposite sign.

The diagram on the right shows that the total power S’ decreases, and the power factor P / S’ increases.

The effect of using the RPC panel
cos φ, without compensation	cos φ, with compensation	Reduction of total power and current, %	Reduction of heat loss, %
0,5	0,9	44	69
0,5	1	50	75
0,6	0,9	33	55
0,6	1	40	64
0,7	0,9	22	39
0,7	1	30	51
0,8	1	20	36

Design and manufacture of reactive power compensation panel

Xây Lắp Điện Quang Anh offers design and manufacture reactive power compensation panel.

After the necessary measurements, our experts conclude: how much reactive power must be compensated; optimal panel parameters; the price of the panel and the payback period.

The customer receives full information about the panel, its parameters and terms of production.

QUANGANHCONS

Substation budget estimate

Select the capacity, route lengths and package to view your indicative budget and electrical parameters.

01 Quick estimate

Substation type Capacity (kVA) Quotation packageIndicative pricing for the selected configuration, excluding VAT. Transformer Overhead MV route length (m)Enter only the overhead section of the route.

Cable and power-factor correction conditions

kVA utilisation before correction (%)Percentage of rated apparent power before correction. Cables and breakers are still selected at transformer rated capacity. Single-core LV cable Transformer-to-breaker installation Ambient temperature (°C)Underground: soil temperature. Above ground: air temperature. Target cosφ after correction cosφ before correctionKeep the suggested value if measured data is unavailable. Transformer impedance uk (%)Use the nameplate value when available.

Live-line connection, multiple transformers/MV feeders or special installation conditions

Request a project quotation

Send your project details, BOQ or drawings to request a formal quotation. Fields marked * are required.

Quotation package Contact name * Phone / Zalo * EmailOptional if you prefer a reply by phone. Company / investor Project location * Project name Transformer / total substation capacity (kVA) Substation type Number of transformers Utility supply voltage MV route type Overhead MV (m) Underground MV (m) Target schedule

BOQ / drawing / site-photo linkShare a Google Drive, OneDrive or document link. Please grant viewing access to the recipient. Project requirements

Reference quick estimate

No quick estimate yet. You can still submit a project quotation request.

I consent to the website operator using the information provided to contact me and process this quotation request.

Quotation scope

Applies to one EVN-supplied substation with oil-immersed transformers at 22/0.4 kV (single-phase: 12.7/0.23 kV), with MV metering VTs/CTs supplied by EVN. The estimate includes the selected equipment, installation, earthing, transformer-to-main-breaker connections, design and connection documentation, and coordination of testing and utility acceptance.

Kiosk, integrated steel-pole and indoor substations include MV switchgear and the entered underground cable route. Other outdoor arrangements use the relevant protection configuration. The final diagram must meet the project connection requirements.

Excludes VAT, cables from the substation switchboard to the MSB/loads, live-line work, harmonic reactors, weak-ground treatment or special piling, land and special fire-protection provisions. Underground routes assume normal construction conditions and exclude road drilling and special reinstatement.

Prices are indicative investment budgets. A formal quotation follows site assessment and agreement on the configuration. Electrical selections are preliminary and require design verification before installation.

Capacity range and application conditions

The catalogue defines the enquiry range of this tool, not universal TCVN capacity limits. Single pole-mounted transformers: 15–100 kVA; three-unit banks: 3×15–3×100 kVA. Platform substations: 100–630 kVA. Steel-pole substations: 100–630 kVA; 750/800 kVA require design verification and local approval. Ground-mounted, kiosk and indoor configurations: 50–10,000 kVA. Not every configuration has a package price or the same structural design.

Reference: EVN Decision 1299/QD-EVN dated 3 November 2017, Volume 1, sections 3.3–3.4. Check the current requirements of the responsible utility before implementation. Kiosks must meet manufacturer ratings and testing requirements (IEC 62271-202); indoor and ground-mounted arrangements must meet project layout, ventilation, structural and fire-protection requirements. For multiple transformers, specify the quantity and capacity of each unit.

Substation budget estimate

Login