Description
Technical Parameters
Henan GNEE Electric Co., Ltd. is one of the leading manufacturers and suppliers of yyn0 oil type transformer in China, also supports customized service with low price. Welcome to buy discount yyn0 oil type transformer for sale here from our factory. If you have any enquiry about pricelist, please feel free to email us.
Product Introduction
A Yyn0 transformer is a three phase power transformer with a specific connection and cooling method. In the Yyn0 designation, the first "Y" indicates that the primary winding is connected in a star (Y) configuration, while the second "yn" means the secondary winding is also star-connected, with the neutral point grounded. The "0" denotes that the primary and secondary phase voltages are in phase.
If you'd like more information regarding oil immersed transformers, contact our team via sales@gneesteels.com.
Product video
Gnee supply
SH15-M Sealed Amorphous Alloy Power Transformer
lSO-certified Customization available 2-years warranty 100% QC passed
Superior Core Material
Made from a high-resistivity amorphous alloy (Fe, Co, Ni, Si, B, C)
Thin core (0.027mm) for ultra-low magnetization power
3-6x higher resistivity and 5x harder than silicon steel
High Performance
Rated Voltage: 6kV-35kVRated
Capacity: 30KVA-2500KVA
No-load Loss: 33W-900W
Load Loss: 600W-21200WNo-load
Current: 1.5%-0.2%-energy savings even at idle!
Oil-filled Sealed Design
Enhanced durability and reliability
Perfect for rural, industrial, and grid modernization projects
Contact us to learn more or request a quote!
Technical specification
Yyn0 transformer oil type parameters
Yyn0 transformer Oil Type Structure
The differences between Yyn0 transformers and Dyn11 transformers
The main differences between Yyn0 and Dyn11 transformers lie in winding connection modes, phase differences, harmonic suppression capabilities, and application scenarios. Here's a detailed comparison:
1. Winding Connection Modes
| Item | Yyn0 Transformer | Dyn11 Transformer |
|---|---|---|
| Primary Side (HV) | Star (Y) connection, neutral ungrounded | Delta (D) connection, no neutral point |
| Secondary Side (LV) | Star (yn) connection, neutral grounded | Star (yn) connection, neutral grounded |
| Neutral Grounding | Secondary neutral directly grounded | Secondary neutral directly grounded |
2. Phase Difference
Yyn0:
The phase voltage of the primary and secondary windings is in phase (phase difference of 0∘), indicated by "0" in the notation.
Example: The phase voltage of primary phase A is aligned with secondary phase a.
Dyn11:
The line voltage of the primary delta winding leads the corresponding line voltage of the secondary star winding by 30∘, denoted by "11" (representing a 30∘ angle in clock notation).
Example: Primary line voltage AB leads secondary line voltage ab by 30∘.
3. Zero-Sequence Current and Harmonic Suppression
Yyn0:
No neutral point on the primary side, so zero-sequence current cannot circulate, potentially causing neutral point shift and zero-sequence voltage in the secondary side.
Third harmonic (3n order) currents cannot form a loop in the primary side, risking core saturation, increased losses, and voltage waveform distortion.
Application: Suitable for systems with low harmonic requirements and small single-phase loads (e.g., rural power grids or simple three-phase loads).
Dyn11:
The primary delta winding provides a circulation path for zero-sequence currents, effectively suppressing zero-sequence currents and third harmonics, improving voltage waveform quality.
Stable neutral grounding on the secondary side, ideal for systems with heavy non-linear loads (e.g., variable frequency drives, IT equipment) or high single-phase loads (e.g., urban distribution networks, commercial buildings).
4. Short-Circuit Impedance and Fault Current
Yyn0:
Higher zero-sequence impedance results in smaller single-phase ground fault currents, which may affect the sensitivity of protection devices.
Dyn11:
Lower zero-sequence impedance leads to larger single-phase short-circuit currents, making it easier for protection devices to detect and act, enhancing system safety.
5. Application Scenarios
| Scenario | Yyn0 Transformer | Dyn11 Transformer |
|---|---|---|
| Low-Voltage Distribution | Used in balanced three-phase loads with few single-phase loads (e.g., factory power loads). | Widely applied in systems with heavy single-phase or non-linear loads (e.g., lighting, appliances, data centers). |
| Harmonic Suppression | Poor (vulnerable to harmonics) | Excellent (delta winding suppresses third harmonics) |
| Neutral Stability | Prone to neutral shift due to zero-sequence currents | Stable neutral, suitable for high voltage quality requirements |
| International Standards | Used in rural grids or legacy industrial systems in China | Aligns with IEC standards, preferred for urban grids, high-rise buildings, and commercial applications |
Certifcations
FAQ
Q: What is ester oil in transformers?
A: Ester oil in transformers is a biodegradable insulating and cooling fluid, offering higher fire resistance and environmental safety than traditional mineral oil.
Q: What is an oil-filled transformer?
A: An oil-filled transformer is an electrical device that uses insulating oil (like mineral or ester oil) as both a coolant and dielectric medium. The oil helps dissipate heat generated during operation and prevents electrical arcing between components, ensuring safe and efficient power transfer between voltage levels. It is widely used in power grids, industries, and commercial settings for its reliability and thermal performance.
Q: What kind of oil is used in transformers?
A: Transformer oils mainly include three types:
Mineral Oil: Derived from petroleum, it offers good insulation and heat dissipation but is flammable and non-biodegradable.
Synthetic Oil (e.g., Silicone Oil): Chemically produced, it is heat-resistant, non-flammable, and used in high-temperature or fire-sensitive environments.
Ester Oil (Natural/Synthetic): Extracted from plants or chemically synthesized, it has low flammability, biodegradability, and is eco-friendly, suitable for indoor use or ecologically sensitive areas.
Additionally, Gnee offers oil immersed transformers with capacities ranging from 30 kVA to 2500 kVA. Should you require further details, our team is available at sales@gneesteels.com to provide personalized support.
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