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Global Procurement Guide for 500 kVA-11/0.4kv Three phase Oil immersed Transformers

Name: Global Procurement Guide for 500 kVA-11/0.4kv Three phase Oil immersed Transformers
Brand: HENGFENGYOU
SKU: HFY-491

I. Overview of 500kva Transformer

Against the backdrop of global electricity demand growth, 500 kVA transformers, as small and medium-sized rated capacity power transformers, are widely used in rural power grids, industrial plants, commercial buildings, renewable energy, and public utilities.

With rigorous engineering and proven field performance, our transformers have successfully passed high-reliability operation verification in over 50 countries and regions worldwide. HENGFENGYOU ELECTRIC has a robust footprint across key global markets, including:

Africa: Tanzania, Zimbabwe, Ghana, South Africa, Kenya, Zambia, Sudan, Libya, Congo, Mozambique, Ethiopia, Nigeria, Namibia, and more.
Middle East: Iraq, Syria, Saudi Arabia, United Arab Emirates (UAE), etc.
Asia & Southeast Asia: Bangladesh, Pakistan, Philippines, Vietnam, Myanmar, etc.
Central Asia & Europe: Countries adopting IEC/GOST/EN distribution standard grid networks.

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Transformer Specifications

Manufacturer

HENGFENGYOU ELECTRIC

Standard on which performance data is based

IEC 60076,GB 1094-1996,GB/ T6451-2008,GB/T 7597-2007

Type

OIL IMMERSED

Method of Cooling

ONAN

Rated Power

500 KVA

Voltage Ratio

11kv/0.4kv 11kv/0.416 kv 11kv/0.420kv

Frequency

50HZ/60HZ

Tap Changer

HV·Tapping

±2.5%;±5%

Vector Group

Dyn11 or Yyn0

Core Material

CRGO Steel

Winding Material

Alumnium or Copper

No Load Losses (GB/T S13 series)

459w

Load Losses (GB/T S13 series)

3900w

Dimensions of Transformer

1340*920*1710mm

II. Available 500 kVA Transformer Types

HENGFENGYOU ELECTRIC design and manufacture a comprehensive range of 500 kVA transformers utilizing the same fundamental electromagnetic principles but engineered with distinct structural topologies to satisfy diverse global grid applications.

500 kVA Three-Phase Oil-Immersed Transformer (Rated Voltage: 6 kV to 35 kV) – Ideal for outdoor grids and industrial heavy loads.
500 kVA Cast Resin Dry-Type Transformer (Rated Voltage: 6 kV to 35 kV) – Perfect for indoor facilities, commercial complexes, and high-safety environments.
500 kVA Three-Phase Pad-Mounted Transformer (Rated Voltage: 2.4 kV to 34.5 kV) – Designed for North American style underground residential distribution.
500 kVA Isolation Transformer (Low Voltage: 120V, 127V, 208V, 220V, 380V, 400V, 600V) – Engineered for precise voltage matching and signal isolation.

III. Core Engineering Advantages of HENGFENGYOU 500 kVA Transformers

Global Standard Compliance: Fully complies with GB, IEC, GOST, EN, NF, and ANSI/IEEE standards. Custom engineering is available to meet specific utility grid codes.
International Certifications: Certified by ISO9001, CE, IEC, SABS, COC, CSA, and UL, assuring global cross-border market entry and insurance approval.
Premium Eco-Design Efficiency: System efficiency exceeds 99%, fully satisfying the stringent European 2015/2014/548/EC Ecodesign Tier 2 energy efficiency regulations, lowering long-term operational costs (OPEX).
Maintenance-Free Enclosure: Featuring an IP65 hermetically sealed protection level. It is 100% dustproof and moisture-proof, offering a maintenance-free design with an engineered operational lifespan of over 25 years.
Eco-Friendly Sustainability: Optional biodegradable FR3 vegetable/ester oil is available to reduce carbon footprint and mitigate environmental hazards.
Robust Overload Capacity: The high-purity copper-wound 500 kVA model reliably supports a short-term emergency overload up to 150% of the rated capacity for up to 2 hours (requires top oil temperature monitoring to remain ≤ 95 ℃).

IV. Price of 500 kVA Transformer
Are you looking for wholesale pricing or a commercial proposal for a specific project? Click the links below to receive a factory-direct wholesale quotation within 24 hours:

Get the price of 500kva three-phase oil immersed transformer

Get the price of 500kva three-phase epoxy resin dry-type transformer

Get the price of 500kva three-phase pad mounted transformer

Get the price of 500kva three-phase isolation transformer

V. Global Project Showcases & Success Stories

Scale Your Energy Business with HENGFENGYOU ELECTRIC
As a premium global electrical equipment manufacturer, our accumulated engineering expertise and cutting-edge manufacturing technology have benefited EPC contractors and utilities in more than 50 countries. We focus on establishing long-term, trusted partnerships by delivering zero-defect power products and unparalleled technical support.

VI. Frequently Asked Questions (FAQ) for 500 KVA Transformers

Q1：What are the typical application scenarios of 500kVA three-phase oil immersed transformers?

Power distribution for small and medium-sized factories;

Electricity supply for commercial buildings, hospitals, or schools;

Voltage conversion of rural power grids or community distribution systems;

Power distribution at temporary construction sites.

Q2：What are the common configurations for the rated input/output voltage of a 500KVA transformer?

High voltage side: 11kV (domestic distribution standard);

Low voltage side: 400V (three-phase four wire system, line voltage 400V/phase voltage 230V);

Q3：How to calculate the rated current of a 500KVA transformer?

High voltage side: I=500kV/11kV/√3=26.24A

Low voltage side: I=500kV/0.4kV/√3=721.7A

Q4：What are the requirements for the surrounding environment during the installation of a 500KVA transformer?

Good ventilation, keep away from flammable and explosive materials;

The basic platform requires horizontal load-bearing capacity (with an oil content of approximately 200kg);

Reserved heat dissipation space (with a side distance of ≥ 0.8 meters from the wall and no obstacles at the top);

Outdoor installation requires the installation of rain covers or fences.

Q5：What is the overload capacity of a 500kVA transformer?

Short term overload (such as within 2 hours) can reach 150% load (copper coil);

Long term overload will accelerate insulation aging, and it is necessary to avoid operating beyond the rated capacity.

Q6：What are the key points to pay attention to in the daily maintenance of a 500KVA transformer?

Oil level check: The oil level gauge of the oil pillow should be within the marked range;

Oil temperature monitoring: During normal operation, the top oil temperature is ≤ 65 ° C;

Leakage inspection: Check whether the welds and gaskets of the fuel tank are leaking oil;

Regular tests: insulation oil withstand voltage test, winding DC resistance measurement (once a year).

Q7：How to determine if the insulation oil needs to be replaced for a 500KVA transformer?

Breakdown voltage: below 30kV (new oil standard ≥ 35kV);

Excessive acid value:> 0.1mg KOH/g

High moisture content:> 20ppm

The oil color is dark black or contains carbide particles (needs to be filtered or replaced).

Q8：Possible causes and solutions for abnormal temperature rise of 8.500KVA transformer?

Reason: Overload, blocked radiator, oil circulation failure, internal winding short circuit;

Solution: Immediately reduce the load and check the load; Clean the radiator or repair the cooling system; Suspend maintenance due to internal malfunction.

Q9：What protective devices must be configured for a 500KVA transformer?

High voltage side: drop out fuse or circuit breaker (overcurrent protection);

Low voltage side: air switch (short circuit protection);

Body protection: gas relay, pressure reducing valve, thermometer;

System protection: lightning arrester (lightning protection), grounding device (grounding resistance ≤ 4 Ω).

Q10：How to choose the energy efficiency level of a 500KVA transformer when purchasing?

Standard: According to local national energy efficiency regulations or customer requirements

Example: The latest energy-efficient 500kVA oil immersed transformer in Europe has a no-load loss of 459W and a load loss of 3900W; Energy efficiency>99.46%

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