15KV Fully Sealed Three-phase Oil-immersed Distribution Transformer

15kv Oil immersed Transformer Technical Specifications

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- Input voltage: 15kV
- Output voltage: 0.4kv 0.415kv 0.420kv
- Capacity: 30-5000 kva
- Frequency: 50 hz
- Remark: voltage, capacity, frequency, connection group and loss can be customized according to customer requirements

 

15KV Oil-immersed Transformer Technical Specifications>>>

Rated Capacity(KVA)	Voltage Combination and Decomposition Ranges			Vector Group	No-load Loss(w)	Load Loss(w)	No-load current (%)	Short Circuit Impedance(%)
	High Voltage Tap Range(kv)	Tap Changing Scope(%)	Low Voltage (kv)
30	15	±2×2.5 ±5	0.4	Dyn11 Yzn11 Yyn0	100	630/600	1.50	4.0
50					130	910/870	1.30
63					150	1090/1040	1.20
80					180	1310/1250	1.20
100					200	1580/1500	1.10
125					240	1890/1800	1.10
160					280	2310/2200	1.00
200					340	2730/2600	1.00
250					400	3200/3050	0.90
315					480	3830/3650	0.90
400					570	4520/4300	0.80
500					680	5410/5150	0.80
630				Dyn11 Yyn0	810	6200	0.60	4.5
800					980	7500	0.60
1000					1150	10300	0.60
1250					1360	12000	0.50
1600					1640	14500	0.50
2000					1940	18300	0.40	5.0
2500					2290	21200	0.40

 

Against the backdrop of global electricity demand growth, 15kV 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 as Angola, Zambia, Uganda, Ethiopia, Rwanda, Mauritania, C ô te d'Ivoire,etc

 

15kv Oil immersed Transformer Type

For HENAN GNEE ELECTRIC CO., LTD., a 15kv transformer can be a three-phase oil immersed transformer, a column mounted three-phase oil immersed transformer, or a three-phase pad mounted transformer. These types of transformers have the same principle, but their structures are different, and different types of transformers have different applications.HENAN GNEE ELECTRIC CO., LTD. provides you with the most ideal solution.

• 15kV three-phase oil immersed transformer (rated voltage 6kV-35kV)
• Install a three-phase oil immersed transformer (rated voltage 2.4kv-34.5kv) on an 15kV column
• 15kV three-phase pad mounted transformer (rated voltage 2.4kv-34.5kv)

 

15kv Oil immersed Transformer Standar & Certifaication

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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 15kV 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 15kv transformer allows short-term overload to 150% of rated capacity for no more than 2 hours, but requires monitoring of oil temperature (≤ 95 ℃).

 

15kv Oil immersed Transformer FAQ

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What is an 15kV 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 15kV/400V). It is widely used in industrial, commercial, and power grid distribution.

 

What are the typical application scenarios?

*Voltage conversion of urban distribution network (15kV → 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.

 

What is the rated capacity range?

The common capacity ranges from 25kVA to 10MVA, with the 100kVA to 2000kVA models of 15kV/400V being the most widely used, depending on the load requirements.

 

What is the difference in maintenance cycle between 15kV dry-type and oil immersed transformers?

Dry type: Dust removal inspection every 2-3 years; Oil immersed: Check the oil level, oil quality (pressure resistance value, acidity), sealing, and radiator cleaning once a year; Comprehensive oil sample testing every 3-5 years (such as medium loss and moisture content).

 

How to choose between three-phase oil immersed transformer and dry-type transformer?

-15kV oil immersed transformers are suitable for outdoor, high-capacity, and high load scenarios, with low cost but requiring regular maintenance;

-15kV dry-type transformer: used in indoor environments with high fire protection requirements (such as shopping malls and subways), maintenance free but expensive.

 

How to determine whether a transformer needs to change oil or filter oil?

-Oil quality testing: Regularly test the breakdown voltage (should be ≥ 30kV), water content (≤ 20ppm), and acid value of the oil;

-Cloudy oil color: The oil becomes darker or there is an increase in suspended matter;

-Decreased insulation performance: determined by withstand voltage test.

 

 

What are the reasons for the abnormal temperature rise during operation?

-Long term overload;

-Cooling system malfunction (fan/oil pump shutdown);

-Oil circuit blockage or insufficient oil volume;

-Internal short circuit or poor contact.

 

How to deal with oil leakage in oil immersed transformers?

-Slight oil leakage: tighten bolts or replace gaskets;

-Serious oil leakage: Stop immediately, drain the oil and repair or replace components;

 

What protective devices must be configured?

*High voltage side: circuit breaker or fuse (with overcurrent/short-circuit protection);

*Body protection: gas relay, pressure relief valve, oil temperature gauge;

*System protection: lightning arrester (anti lightning impulse)

*Monitoring device: oil level gauge, online oil chromatography analyzer (high-end configuration).

 

 

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.

 

Features of 6kV to 15kV Oil Immersed Distribution Transformer:

1. Rated voltage: 6kV,6.3kV,10kV,10.5kV,11kV,13.2kV,13.8kV,15kV

2. Rated power capacity: 10kVA, 30kVA, 50kVA, 63kVA, 80kVA, 100kVA, 125kVA, 160kVA, 200kVA, 250kVA, 315kVA, 400kVA, 500kVA, 630kVA, 800kVA, 1000kVA, 1250kVA, 1600kVA

3, Two windings or three windings

4, On-load or no-load voltage tapping changer

5. Frequency: 50Hz /60Hz

6. Vector group: Dyn11, Yyn0, Ynd11, or others

7. Cooling: ONAN/ ONAF/ OFAF

8. Tap changer:3 levels; 5 levels; 7 levels; 13 levels; 17 levels