20kV 22kV Oil Immersed Electrical Grounding Transformer for Renewable Energy
Key attributes
| Brand | Vziman |
| Model NO. | 20kV 22kV Oil Immersed Electrical Grounding Transformer for Renewable Energy |
| Rated voltage | 20kV |
| Rated capacity | 150KVA |
| Series | S11 |
Product descriptions from the supplier
Description
20kV oil immersed electrical earthing transformer
Product overview
Vziman provides a complete range of specialized transformers, including high-quality industrial earthing transformers and premium oil immersed grounding transformer. The 20kV 150kVA oil immersed grounding transformer is engineered to deliver exceptional reliability, durability, and efficiency, perfectly suited for utility, industrial, and commercial applications that demand stable grounding performance.
This oil immersed grounding transformer, as a core member of Our industrial earthing transformers series, is manufactured in accordance with the most demanding industry and international standards. Compliance with key standards such as IEC and VDE is guaranteed, paired with the exclusive use of high-quality materials to ensure the oil immersed grounding transformer meets the rigorous operational requirements of industrial earthing transformers. Vziman’s qualified employees strictly implement these demanding standards in daily production, ensuring every oil immersed grounding transformer maintains consistent quality and performance.
Service condition
- Suitable for indoor or outdoor installation of the oil immersed grounding transformer, adapting to the flexible layout needs of industrial earthing transformers in various scenarios.
- Air temperature: Maximum temperature +40ºC; Minimum temperature -30ºC, ensuring the oil immersed grounding transformer operates stably in extreme temperature environments common to industrial earthing transformers.
- Humidity: Monthly average humidity 95%; Daily average humidity 90%, the sealed structure of the oil immersed grounding transformer effectively resists moisture, meeting the humidity requirements of industrial earthing transformers in humid regions.
- Altitude above sea level: Maximum installation altitude 2000m; parameters can be adjusted for higher altitudes to ensure the oil immersed grounding transformer performs reliably as industrial earthing transformers in high-altitude areas.
- Max wind speed: 35m/s, the robust structure of the oil immersed grounding transformer withstands strong winds, suitable for outdoor industrial earthing transformers applications.
- Ambient air free from obvious pollution by corrosive and flammable gases, vapors, etc., which is a basic requirement for the safe operation of the oil immersed grounding transformer and other industrial earthing transformers.
- No frequent violent vibration, ensuring the internal components of the oil immersed grounding transformer remain stable, avoiding performance degradation of industrial earthing transformers due to vibration.
Note: Beyond those services condition should enquiry to manufacturer technical dept during order
Tests
- Voltage ratio. Polarity and phase relationship test on each tapping
- Resistance of all windings
- No-load current and no-load losses measurement
- Load losses measurement at rated current and frequency
- Impedance voltage measurement
- Induced over-voltage and separate source voltage withstand tests
- Impulse voltage withstand test.
- Noise level test
- Oil leakage test
- Overload test at 150% rated current for one hour after temperature rise test and hot resistance measurement of (HV - LV)
Product Parameters
| Rated Power | Load losses | No-load losses | No load current% | Impedance% |
| S11-30 | 630 | 100 | 2.1 | 4 |
| S11-50 | 910 | 130 | 2 | 4 |
| S11-63 | 1090 | 150 | 1.9 | 4 |
| S11-80 | 1310 | 180 | 1.8 | 4 |
| S11-100 | 1580 | 200 | 1.6 | 4 |
| S11-125 | 1890 | 240 | 1.5 | 4 |
| S11-160 | 2310 | 270 | 1.4 | 4 |
| S11-180 | 2730 | 330 | 1.3 | 4 |
| S11-250 | 3200 | 400 | 1.2 | 4 |
| S11-315 | 3830 | 480 | 1.1 | 4 |
| S11-400 | 4520 | 570 | 1 | 4 |
| S11-500 | 5410 | 680 | 1 | 4 |
| S11-630 | 6200 | 810 | 0.9 | 4.5 |
| S11-800 | 7500 | 980 | 0.8 | 4.5 |
| S11-1000 | 10300 | 1150 | 0.7 | 4.5 |
| S11-1250 | 12000 | 1360 | 0.6 | 4.5 |
| S11-1600 | 14500 | 1640 | 0.6 | 4.5 |
Standard Features
- Product Range:15kVA-10000kVA, up to 44kV
- System voltage: max. 36 kVA 200 BIL
- Coolers: corrugated wall or radiator
- Oil preservation: hermetically sealed or conservator/free breathing
- Tap changer: off-circuit or on-load
- Cooling medium: mineral oil, Midel
- Steel type core clamping system
- High voltage (HV) multilayer winding
- Low voltage (LV) foil winding or layer winding
- Winding materials aluminium or copper
- High temperature class transformers
- Low noise solution
- Efficient transformers with reduced losses
- Liquid-filled
- Used in special conditions
- Sophisticated facilities
- Usage of wooden case
- 3D package for drawings
- Special test like Zero Sequence Impendence test
- Cooling: ONAN, ONAN/ONAF, KFAF, KFW
Documentation Resource Library
FAQ
Restricted.
Vziman Transformer Substation selection catalog
Catalogue
English
Consulting
Q: Why is an oil immersed grounding transformer preferred over dry-type alternatives in large-scale renewable energy applications?
A:
For large-scale renewable energy projects, the oil immersed grounding transformer excels with higher thermal capacity and longer service life under continuous variable loads. Its oil insulation effectively dampens transient surges common in wind and solar farms, while sealed construction resists moisture, salt spray, and dust. These industrial earthing transformers are engineered to meet the rigorous demands of sustainable power generation, combining durability with low maintenance needs.
Q: Why is an oil-immersed grounding transformer preferred over dry type alternatives in large-scale renewable energy applications?
A:
For large-scale renewable energy projects, the oil-immersed grounding transformer excels with higher thermal capacity and longer service life under continuous variable loads. Its oil insulation effectively dampens transient surges common in wind and solar farms, while sealed construction resists moisture, salt spray, and dust. These industrial earthing transformers are engineered to meet the rigorous demands of sustainable power generation, combining durability with low maintenance needs.
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