Manufacturing
Power Transformer Repairs
Repairing a power transformer with a rating of 33/11 kV involves several important steps and considerations. Here's some related content to help you understand the process:
1. Transformer Overview:
- A power transformer is an electrical device that transfers electrical energy between different voltage levels.
- The rating "33/11 kV" indicates that the transformer has a primary (high-voltage) side rated at 33 kV and a secondary (low-voltage) side rated at 11 kV.
2. Preliminary Inspection:
- Before repairing a power transformer, a thorough inspection should be conducted to assess the extent of the damage or fault.
- Inspect the transformer for physical damage, oil leaks, burnt components, loose connections, or any other visible signs of malfunction.
3. Isolation and Safety:
- Ensure the transformer is de-energized and isolated from the power source before starting any repair work.
- Follow proper safety procedures, including wearing appropriate personal protective equipment (PPE) such as gloves, goggles, and insulating clothing.
4. Fault Diagnosis:
- Identify the specific fault or issue with the transformer, such as short-circuits, open circuits, winding faults, or insulation breakdown.
- Use specialized testing equipment like insulation testers, turns ratio testers, and power factor meters to diagnose the problem accurately.
5. Repairing Procedures:
- Repair or replace faulty components such as windings, insulation, tap changers, bushings, or cooling systems.
- Clean or replace contaminated or degraded insulating oil, ensuring it meets the required specifications.
- Repair or replace damaged connections and busbars, ensuring proper electrical conductivity.
6. Testing and Commissioning:
- After repairing the transformer, perform comprehensive testing to ensure its proper functioning and compliance with safety standards.
- Conduct tests such as turns ratio, insulation resistance, winding resistance, impedance, and partial discharge tests.
- Once the transformer passes all the tests, it can be commissioned and put back into service.
7. Maintenance and Monitoring:
- Implement a regular maintenance schedule for the transformer to prevent future issues and ensure optimal performance.
- Regularly monitor key parameters such as temperature, oil levels, cooling system efficiency, and insulation condition.
- Periodically conduct diagnostic tests to detect any potential problems at an early stage.
Technical Specification and Product Range
| # | Capacity(MVA) | Voltage Class(KV) |
|---|---|---|
| 1 | 1 | 33KV/11KV |
| 2 | 2 | 33KV/11KV |
| 3 | 3 | 33KV/11KV |
| 4 | 4 | 33KV/11KV |
| 5 | 5 | 33KV/11KV |
