Product Description

33kv Oil immersed Transformer Introduction

Against the backdrop of global electricity demand growth, 33kV 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 asSouth Africa, Zimbabwe, Sudan, Kenya, Mozambique, Tanzania, Ethiopia, Nigeria, Namibia, Iraq, United Arab Emirates, Saudi Arabia


33kv 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 33kV 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 33kv 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 33kV Oil-Immersed Transformer

- Input Voltage: 33 kV

- Output Voltage: 0.4 kV

- Capacity: 30–25,000 kVA

- Frequency: 50 Hz

- Voltage Regulation Method: Off-circuit tap changing (NLTC)

- Note: Voltage, capacity, frequency, vector group, on-load tap changing (OLTC), and no-load/load losses can be customized according to customer requirements.


Capacity

Rated voltage&Off-load tapping

NO-loadloss(W)

Load loss(W)

NO-load current

Short circuit impedance(%)

H.V(kv)

 High pressure  Tap range(%)

L.V(kv)

50 kva

33kV
35kV
38.5kV

±5%
±2x2.5%

0.4
0.416
0.42
0.44

210

1270/1210

2.0

6.5

100 kva

290

2120/2020

1.8

6.5

150 kva

340

2500/2380

1.7

6.5

160kva

360

2970/2380

1.6

6.5

200 kva

430

3500/3330

1.5

6.5

250 kva

510

4160/3960

1.4

6.5

300 kva

610

5010/4770

1.4

6.5

400 kva

730

5050/5760

1.3

6.5

500 kva

860

7280/6930

1.2

6.5

600 kva

1040

8280

1.1

6.5

750 kva

1230

9900

1.0

6.5

1000 kva

1440

12150

1.0

6.5

1250kva

1760

14670

0.9

6.5

1500 kva

2120

17550

0.8

6.5

2000 kva

2490

20740

0.8

6.5

2500 kva

2950

24420

0.8

6.5

3000 kva

3510

29050

0.7

6.5

4000 kva

4200

34940

0.7

6.5

5000 kva

4960

41160

0.7

6.5


FAQ

Q1、 What is an 33kV 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 33kV/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 (33kV → 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 33kV/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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