Auxiliary Transformer in Substation
Auxiliary transformers in substations are core equipment in substation power supply systems, providing stable power for critical systems such as control, protection, lighting, and cooling. These products utilize an oil-free epoxy resin casting structure, ensuring high safety and reliability. They also possess excellent voltage regulation performance (voltage regulation rate ≤2%), effectively handling load fluctuations and are widely used in various substations and converter stations.
Description
Details page content
I. A brief product introduction
This auxiliary transformer in substations is used to convert a given AC voltage (current) into a different voltage (current) with the same frequency. It achieves electrical energy transfer based on the principle of electromagnetic induction. The delta-connected high-voltage winding provides a circulating path for the third harmonic, reducing harmonic pollution to the power grid. It is an essential piece of equipment for power distribution. The product is used in 6kV~35kV medium-voltage distribution network systems, power plants, substations, wind and solar power station collector lines, and step-up substation systems.
II. Model Explanation
III. Product Details/Advantages
- 1. Stable Power Supply
Minimal voltage fluctuation ensures continuous, stable power and prevents equipment failures.
- 2. High Conversion Accuracy
Low voltage error ensures precise output for sensitive control and protection devices.
- 3. Strong Impact Resistance
Excellent overload capacity quickly stabilizes voltage/current during startups or load surges.
- 4. Wide Load Adaptability
Flexibly matches control, power, and emergency loads, reducing system costs.
- 5. Durable & Eco-Friendly
Low failure rate, minimal maintenance. Dry type: no emissions. Oil-immersed: sealed insulation with efficient cooling.
IV. Product Parameters
Key Product Parameters:
- Power & Voltage: 30-1600kVA, 10(35)kV/0.4kV
- High Efficiency & Stability: Voltage regulation ≤2%; No-load loss as low as 0.25%
- Robust Reliability: F/H class insulation
- Short-circuit withstand >2s
- Substation-Adapted: IP30-IP40 protection; Noise level ≤50dB
V. Scope of Supply
|
No |
Name |
Model |
Quantity |
Unit |
|
1 |
dry type grounding transformer |
Based on actual parameters |
1 |
Set |
|
2 |
cabinet body |
Based on actual parameters |
1 |
Set |
VI. Optional Customization Solutions
We deliver more than just transformers-we provide engineered solutions. Our custom-designed dry-type transformers are tailored to overcome your specific challenges, from harsh operating environments and space constraints to complex grid and smart monitoring requirements. Partner with us for a product that is precisely fit for purpose.
VII. Quality
The products have passed international certifications such as ISO9001 and 3C.
Qualification association: We adhere strictly to globally recognized regulations and protocols, integrating environmental excellence and quality management throughout the product lifecycle.
VIII. Real-world cooperation cases
This dry type Auxiliary transformer in substation was custom-delivered to meet the needs of the 23kV urban power grid upgrade project in San José, Costa Rica. The project's completion and commissioning ceremony was witnessed by the President of Costa Rica. After being put into operation, the transformer successfully undertook the power supply guarantee task for the substation's control circuits and auxiliary equipment, operating continuously for 24 months without failure. This helped improve the power supply reliability of the regional power grid to 99.98%, and the customer highly praised its stability and environmental compatibility.
IX. Application Scenarios
Various types of substations/converter stations deliver safe, reliable power for control, protection, lighting, and auxiliary equipment (e.g., fans), serving as core equipment for stable substation operation.
- New energy power stations (wind farms, photovoltaic plants): supply power to monitoring systems and inverter cooling; suitable for outdoor use.
- Industrial, mining, and infrastructure applications (mines, ports, rail transit, data centers): meet fire safety and compact space requirements.
- Oil-free, flame-retardant, low-noise, maintenance-free design makes them ideal for indoor or space-limited locations, providing clean, stable power to critical loads.
X. Our Service
Our after-sales service and technical team solemnly promises
Pre-Sales Service
- Consultation & Guidance: 24/7 online support with expert engineers to clarify needs, recommend solutions, and advise on pricing and processes.
- On-Site Inspection: Engineers visit sites for precise measurements and environmental assessment, deliver detailed reports to support tailored system design.
After-Sales Service
- Year Warranty: Covers material/manufacturing defects as per contract.
- Dedicated Support: One-on-one follow-up from a specialized team for seamless assistance.
- Multi-Channel Help: Support via contacts, project teams, or website; fast global coordination for repairs or replacements during warranty.
XI. Product usage tutorials, solutions, and technical problem notifications
Pre-Startup Checklist: Key Verification Items
- Visual & Mechanical Inspection
- Electrical Integrity Check
- Cooling & Environmental Verification
[Click here to view the complete product manual & detailed instructions >]
XII. Packaging and Transportation
XIII. Factory Strength
1. Qualification Certificates
2. Innovative technologies/capabilities
(1) High-tech enterprise certificate
3. Supply Chain Advantages
Our core supply chain advantages: Efficient, flexible, and worry-free
1.Rapid response and stable delivery
Flexible production: Our flexible production lines can quickly respond to your urgent orders and special requirements, without delaying your project schedule.
2.Dual control of cost and quality
Source control: Long-term cooperation with core suppliers (such as silicon steel and copper) ensures stable material quality from the source and secures more competitive prices.
4. Professional production equipment (CNC)
XIV. FAQ
Q: 1. What typically leads to excessive heat in the windings, and what is the proper response?
A: Common Triggers: This is frequently due to issues with the cooling system (such as fan malfunction), extended operation beyond rated capacity, heavy buildup of debris on the windings, or internal electrical failures like short circuits between turns.
Recommended Actions: Begin by cleaning the windings and checking/replacing any defective fans. Should temperatures persist even after reducing the electrical load, it is critical to de-energize the unit. Subsequently, perform insulation integrity and DC resistance tests to check for potential internal damage.
Q: 2. Why might insulation resistance drop, and how can this be corrected?
A: Primary Factors: A decline is mainly attributed to moisture infiltration in the windings, contamination from dirt or dust on surfaces, degradation of the insulating material over time, or operation in an environment with high humidity levels.
Resolution Steps: The necessary corrective actions involve comprehensive cleaning and drying of the windings (for instance, using controlled hot air). Furthermore, implementing steps to lower the surrounding air humidity (ideally keeping it at or below 85%) is essential to tackle the root cause of moisture absorption.
Q: 3. What can different unusual operational noises suggest about potential faults?
A: Sound Analysis and Response:
Arcing or Sparking Noise: Often signals a failure in insulation. The unit requires an immediate shutdown for a thorough internal examination and replacement of any compromised insulation components.
Pronounced Humming or Buzzing: Commonly results from excessive load or voltage supply. The response should involve lowering the load and verifying that the input voltage is within the specified range.
Persistent Grinding or Rubbing: Typically points to mechanical issues, such as loose structural fastenings in the core or deteriorating bearings in the cooling fans. These components need to be tightened or replaced accordingly.
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