Product Description

35kv Oil immersed Transformer Introduction

Against the backdrop of global electricity demand growth, 35kV three-phase oil immersed transformers are widely used in rural power grids, industry, commerce, new energy, public facilities, and other fields. High reliability operational verification in over 50 countries and regions worldwide; Already sold to countries and regions such asRussia, Belarus, Ukraine, Uzbekistan, Kazakhstan, Tajikistan, Turkmenistan, Kyrgyzstan, Vietnam, North Korea


35kv Oil immersed Transformer Standards & Certification

1. Standards: GB, IEC, GOST, EN, NF, ANSI/IEEE (customizable according to customer standards)

2. Certification: ISO, CE, IEC, SABS, COC, CSA, UL

3. Efficiency: The efficiency of an 35kV three-phase oil immersed transformer can exceed 99%, which can meet the European 2015/2014/548/EC ecodesign Tier 2 energy efficiency regulations.

4. Maintenance free: IP65 protection level, dustproof and moisture-proof, maintenance free, designed for a lifespan of over 25 years.

5. Environmental protection and sustainable development: FR3 vegetable oil can be selected.

6. Overload capacity: Copper coil 35kv transformer allows short-term overload to 150% of rated capacity for no more than 2 hours, but requires monitoring of oil temperature (≤ 95 °C).


Technical Specifications for 35kV Oil-Immersed Transformers

- Input Voltage: 35kV

- Output Voltage: 0.4kV

- Capacity: 50–5000 kVA

- Frequency: 50Hz/60Hz

- Voltage Regulation Mode: NLTC (No-Load Tap Changer)

- Note: Voltage, capacity, frequency, connection group, and losses can be customized according to customer requirements.


CapacityRated voltage&Off-load tappingL.V(kv)

NO-load
loss(W

Load loss(W)NO-load currentShort circuit impedance(%)
H.V(kv)High pressure Tap range(%)
50 kva

33kV35kV38.5kV

±5%±2x2.5%0.42101270/12102.06.5
100 kva2902120/20201.86.5
125 kva3402500/23801.76.5
160 kva3602970/23801.66.5
200 kva4303500/33301.56.5
250 kva5104160/39601.46.5
315 kva6105010/47701.46.5
400 kva7305050/57601.36.5
500 kva8607280/69301.26.5
630 kva104082801.16.5
800 kva123099001.06.5
1000 kva1440121501.06.5
1250 kva1760146700.96.5
1600 kva2120175500.86.5
2000 kva2490207400.86.5
2500 kva2950244200.86.5
3150 kva3510290500.76.5
4000 kva4200349400.76.5
5000 kva4960411600.76.5

FAQ

Q1、 What is an 35kV three-phase oil immersed transformer?

A three-phase oil immersed transformer is a power transformer that is cooled and insulated by insulating oil. It is designed for use in three-phase AC power systems and can convert high voltage electrical energy into low voltage (such as 35kV/400V). It is widely used in industrial, commercial, and power grid distribution.


Q2、What are the typical application scenarios?

*Voltage conversion of urban distribution network (35kV → 400V);

*Power distribution in industrial plants such as mines and petrochemicals;

*Grid connection of renewable energy power plants (such as wind farms);

*Hospitals, data centers, and other places that require high reliability power supply.


Q3、What is the rated capacity range ?

The common capacity ranges from 25kVA to 10MVA, with the 100kVA to 2000kVA models of 35kV/400V being the most widely used, depending on the load requirements.


Q4、What are the key points to pay attention to when installing?

-Stable foundation, horizontal installation, avoiding tilting;

-Reserve sufficient heat dissipation space (such as at least 1.5 meters away from the wall);

-Grounding resistance ≤ 4 Ω;

-Check the oil level, sealing, and cleanliness of the casing.

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