Three-phase oil-immersed grounding transformer with oil conservator 22kV 27kV 35kV
Key attributes
| Brand | Vziman |
| Model NO. | Three-phase oil-immersed grounding transformer with oil conservator 22kV 27kV 35kV |
| Rated voltage | 22kV |
| Rated frequency | 50Hz |
| Series | SJD |
Product descriptions from the supplier
Description
Industrial earthing transformers Product Description
Oil immersed grounding transformer and industrial earthing transformers are specifically designed to provide an artificial neutral point for ungrounded three-phase power systems. As critical equipment for power system safety, oil immersed grounding transformer excels in harsh industrial environments, while industrial earthing transformers are tailored to meet the rigorous grounding demands of industrial grids.
During a line ground fault, oil immersed grounding transformer provides a low-impedance path for ground fault currents, working in tandem with industrial earthing transformers to effectively limit fault current magnitude and transient overvoltage. This synergy ensures the stability of the entire power system and protects key equipment from damage.
Both oil immersed grounding transformer and industrial earthing transformers typically generate short-circuit grounding currents until the circuit breaker clears the fault, so their fault-bearing duration is relatively short. The design of oil immersed grounding transformer and industrial earthing transformers relies on the normal line-to-neutral voltage and the specified time-dependent fault current value (e.g., seconds to minutes), ensuring they perform reliably under fault conditions.
Industrial earthing transformers Feature
- Efficient Ground Protection for Industrial Scenarios:This oil immersed grounding transformer is equipped with a dedicated oil conservator, serving as a core model among industrial earthing transformers. It stably provides an artificial neutral point for ungrounded three-phase systems, and quickly establishes a low-impedance path for fault currents during ground faults, effectively limiting transient overvoltage and delivering reliable grounding protection for industrial grids and substations where industrial earthing transformers are applied.
- Oil Conservator Design Enhances Operational Stability:The oil conservator balances the oil volume fluctuation caused by temperature changes inside the oil immersed grounding transformer, minimizing the contact between insulating oil and air to slow down oil aging. This design extends the maintenance cycle of the oil immersed grounding transformer and ensures long-term outdoor operation reliability, which is a key advantage for industrial earthing transformers in 22kV-35kV voltage grades.
- Wide Voltage Compatibility for Diverse Grid Needs:Covering 22kV, 27kV, and 35kV mainstream voltage grades, this oil immersed grounding transformer flexibly adapts to grounding standards of industrial grids in different regions. As a standardized type of industrial earthing transformers, it seamlessly integrates into power distribution systems of mines, metallurgy plants, and large industrial parks, meeting customized grounding solution requirements.
- Robust Construction for Harsh Industrial Conditions:Adopting a fully sealed welded tank and anti-corrosion coating, the oil immersed grounding transformer boasts excellent structural strength to resist erosion from high humidity, dusty, and other harsh industrial environments. It meets the strict working condition requirements of industrial earthing transformers, ensuring stable performance in complex outdoor and industrial scenarios.
- Strong Compatibility with Multiple Ground Configurations:This oil immersed grounding transformer supports various grounding configurations such as solid grounding, resistance grounding, and reactance grounding. It can work in coordination with other specifications of industrial earthing transformers to form a multi-level grounding system, further improving the safety and stability of the entire industrial power grid.
Industrial earthing transformers Product Parameters
| Voltage | Up to 22kV |
| Working voltage | 20kV |
| Standard | IEC 60076-6 or equivalent |
| Rated power | 100kVA |
| Rated voltage HV/LV | 20/0.4kV |
| Cooling method | ONAN |
| Frequency | 50Hz |
| Installation | Outdoor |
| Zero sequence impedance | 19 ohms |
| No stage | 3 |
| Voltage regulation range (no tap) | 5 |
| Temperature rise | Complies with IEC standards |
| Winding Material | Copper |
| Insulation class | According to rated voltage(IEC70076-3) |
| Impedance voltage | 5.5 percent |
| Ambient temperature | -40 to +40°C, other temperatures on request |
| Vector group | ZNyn11 |
| Voltage adjustment range (number of taps) | 5 |
| Bushing | Porcelain |
| Creepage | 31mm/kV |
| Breathing | Silicone |
Documentation Resource Library
Restricted.
Vziman Renewable Energy Earthing transformer Catalog
Catalogue
English
Consulting
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