S13 type 30kva oil Immersed transformer is a new generation of products that are more energy efficient and environmentally friendly than the S9. lt is the kind of transformer with rated capacity ranging from 30KVA to 250OKVA, suitable for power systems with a working voltage of6KV-llKV. It is the main transformer equipment of medium and small-sized transformer substation.
Basic information
Type: Oil Immersed Transformer
Phase: Three
Service Voltage: 6KV~11KV
Rated Capacity: 30KVA-2500kVA
Vector group:Yyn0, Dyn11
Cooling type: ONAN
Core material: CRGO
Winding material: Copper/aluminum
Available fluids: mineral oil and ester fluids
Purpose:Three-phase oil type pole mounted power transformers are intended for transforming of electric energy in networks of power systems and in energy consumer networks.
Oil-Immersed Distribution Transformer Overview
S13 type 30kva oil Immersed transformer is a new generation of products that are more energy efficient and environmentally friendly than the S9. lt is the kind of transformer with rated capacity ranging from 30KVA to 250OKVA, suitable for power systems with a working voltage of6KV-llKV. It is the main transformer equipment of medium and small-sized transformer substation.
Product Standards:
IEC 60076 Standard System for Power Transformers
GB 1094 Power Transformer
GB/T 15164 Oil-immersed power transformer load guide
GB/T 6451 Three-phase oil-immersed power transformer technical parameters and requirements
Three Phase Oil immersed Transformer Features:
·Low-voltage windings typically adopt a cylindrical structure of copper foil winding, except for small-capacity using copper wires. High-voltage winding use a multi-layer cylindrical structure, balancing ampere-turns distribution, minimizing magnetic leakage, and enhancing mechanical strength and short-circuit resistance.
·Fastening measures for the core and windings include self-locking nuts on device height and low-voltage leads, along with a non-hanging core structure, ensuring transport shock resistance.
·Coils and cores undergo vacuum drying, and transformer oil is processed through vacuum filtration and injection, minimizing internal moisture.
·The oil tank uses corrugated sheets with respiratory function to compensate for oil volume changes due to temperature fluctuations, eliminating the need for an oil storage tank and reducing transformer height.
·Corrugated sheets isolate transformer oil from the external environment, preventing oxygen and water ingress and maintaining insulation performance.
·These features ensure that our 30kva oil Immersed transformer does not require oil changes during normal operation, significantly reducing maintenance costs and extending service life.
Oil Immersed Hermetically Sealed Transformer Advantage:
S13 type Tridimensional Toroidal-Core Distribution Transformer has a number of significant product features, which make it superior in performance.
Loss Control: According to GB/T6451-1999, no-load loss is reduced by 50%, and load loss by 30%, significantly lowering energy consumption and improving efficiency.
Reduced No-Load Current: Supported by the excellent performance of the coil core material and the unique winding process, the no-load current is reduced by 75% compared to similar products, lowering operating costs and grid interference.
Operating Noise: Compliance with JB/TI0088-1999 standards reduces noise levels by 7 to 9 dB, providing a quieter environment.
Strong Short-Circuit Resistance: A three-dimensional triangular prism structure with pull screws and laminated wood blocks ensures stability under sudden short circuits.
Oil Immersed Electric Transformer Accessories
Accessories Can Be Customized According To Your Requirements | |
HV bushing(Primary bushings) | Radiator |
LV bushing(Secondary bushings) | Oil tank |
Tap Changer | Oil temperature indicator |
Oil Level Indicator | Temperature detector |
oil release valve | Pressure Relief Valve |
Rating plat | Wheels |
Earthing terminal | Lifting lugs |
Q1. What are the primary applications for the Three-Phase Oil Immersed Transformer?
A: Our oil-immersed distribution transformers are versatile power solutions used in urban residential areas, industrial parks, commercial complexes, and rural power grids. They are designed to step down high-voltage power (e.g., 10kV, 11kV, 20kV, 33kV) to usable low-voltage (400V/415V) for end-users.
Q2. What does "Efficiency Level 3" signify for this model?
A: Efficiency Level 3 represents the modern standard for energy efficiency. It is designed to meet or exceed international utility requirements for no-load and load losses. It provides a highly reliable and cost-effective solution for clients who need a high-quality transformer without the premium cost of Level 1 or 2 energy-saving units.
Q3. Why is the "Hermetically Sealed" design important?
A: Our transformers feature a Hermetically Sealed (Full-Sealed) corrugated tank. The oil is completely isolated from the outside air, preventing moisture and oxygen from contaminating the insulating oil. This significantly extends the life of the insulation and makes the unit virtually maintenance-free over its 30-year lifespan.
Q4. How do you ensure the transformer is leak-proof?
A: At our factory in Shanxi, every tank undergoes a 24-hour positive pressure leak test. We use high-precision welding and premium oil-resistant nitrile rubber gaskets at all connection points. The tank surfaces are treated with a multi-layer anti-corrosive coating to withstand harsh outdoor environments.
Q5. What materials are used for the core and windings?
A: We use high-permeability cold-rolled grain-oriented (CRGO) silicon steel for the core to minimize iron losses. The windings are made of high-purity oxygen-free copper, which offers superior conductivity and mechanical strength against short-circuit forces compared to aluminum alternatives.
Q6. What protection devices are included as standard?
A: Every unit is equipped with a Pressure Relief Valve, an Oil Level Gauge, and a Signal Thermometer. For larger units, we can also integrate a Buchholz Relay for gas and surge detection, providing a comprehensive safety system for your local grid.
Q7. What cooling modes (ONAN) do these transformers use?
A: The standard cooling mode is ONAN (Oil Natural Air Natural). The corrugated fins on the tank provide a large surface area for natural heat dissipation. This ensures the transformer maintains an optimal operating temperature even under continuous full-load conditions in high-ambient-temperature regions.
Q8. What is the standard Vector Group and Tap Range?
A: Our standard three-phase models typically use Dyn11 or Yyn0. We provide an Off-Circuit Tap Changer (OCTC) with a range of $\pm 2 \times 2.5\%$ as standard, allowing you to manually adjust the output voltage to match your local grid requirements.
Q9. What testing standards do your transformers comply with?
A: All transformers are manufactured and tested in accordance with IEC 60076 standards. Before leaving the factory, each unit undergoes a full Routine Test, including:
Voltage Ratio and Vector Group Verification.
Insulation Resistance and Dielectric Tests.
No-load and Full-load Loss Measurement to confirm Efficiency Level 3.
Q10. How do you handle shipping for international orders from Shanxi?
A: We use heavy-duty reinforced steel-framed plywood crates. The transformers are securely bolted to the base, and high-voltage bushings are protected with custom covers. We ensure all sensitive accessories are packed to withstand the vibrations of long-distance sea or land freight to your destination.
