1. Visual & Mechanical Inspection
- Verify the bushings and transformer interiors are clean.
- Inspect physical and mechanical condition.
- Check for damaged or cracked insulators and leaks.
- Inspect anchorage, alignment, and grounding.
- Verify correct liquid level in tanks and bushings.
Electrical Transformer Maintenances services
2. Electrical & Protection Checks
- Verify tightness of accessible bolted electrical connections.
- Verify the presence of transformer surge arresters.
- Check on Mechanical Protection.
- Check on Temperature Protection.
3. Transformer Components & Accessories
- Replacement Silica Gel.
- Check on Tap-Changer Mechanism.
- Inspect Buchholz Relay condition.
- Check transformer bushings and associated components.
4. Oil Leakage Treatment
- Oil Leakage Transformer Treatment.
- Treatment of oil leakage in Buchholz and replacement of gasket if required.
- Treatment of oil leakage in insulators and replacement of gasket if required.
- Treatment of oil leakage in radiator flanges.
Electrical Transformer Tests
- Insulation Resistance Test
- Polarity & Phase Rotation Check
- D.C Winding Resistance Test
- Ratio & Vector Group Test
- Capacitance and Tan Delta Measurement at Low Voltage
- Cooler Fans Test
- Measurement of Short-circuit Impedance and load loss & Voltage Ratio Test & Magnetization Current Test
- Capacitance and Tan Delta Measurement at High Voltage
- Oil Purification & Oil Filling
- Mechanical Protection
-
Visual Inspection
- BDV Test
- Power Quality Analysis
- Circuit Breaker Tests
- Thermal Imaging
- CT/VT Testing
- Protection Commissioning
- GIS Testing
- Busbar High-Pot Test
- Cable Testing
-
DC System & Battery Tests
Oil Analysis
Chemical Analysis for Transformer Oil
- Color and visual
- Sludge replace with impurity
- Density 15.5M
- Moisture Content
- Acid Number
- Flash Point
- Dielectric Strength (Breakdown Voltage)
- Viscosity Kinematic
- Interfacial Tension (IFT)
- Power Factor
- Color corrosion
- Furan
Dissolved Gas Analysis for Transformer Oil
- Hydrogen (H2)·
- Oxygen (O2)
- Nitrogen (N2)
- Carbon Dioxide (CO2)
- Ethylene (C2H4)
- Ethane (C2H6)
- Acetylene (C2H2)
- Propane (C3H8)
- Propylene (C3H6)
- Methane (CH4)
- Carbon Monoxide (CO)
Transformer Oil Filtration
1- Oil purification machine
There
is different power flow rate
- 1200 L/hr
- 3000 L/hr
- 6000 L/hr
- 9000 L/hr
- 12000 L/hr
2- Vacuum machine for Transformer Installation Oil Filling
3- Injection nitrogen gas in transformer by
special equipment
Purification
- Impurity Removal: Cleanses the oil by removing impurities and contaminants, enhancing the oil's insulation properties.
- Breakdown Voltage Improvement: Treats and improves the low dielectric breakdown voltage of the oil, ensuring optimal electrical insulation.
- Reduction of Dissolved Gases: Reduces the concentration of dissolved gases within the oil, which contributes to the prevention of internal faults in the transformer.
- Vacuum System for Transformer Installation: Utilizes a vacuum system during the installation of transformers to eliminate air and moisture, ensuring a clean and controlled internal environment.
- Portable Transformer Oil Filtration Machine: This machine is lightweight, portable, and can be used both indoors and outdoors, providing operational flexibility in various environments.
- Multi-Stage Precision Filtration System: Employs a multi-stage filtration process for superior filtration quality, enhancing oil purity.
- Micro particle Contaminant Removal: Uses advanced technology to remove contaminants at the molecular level, filtering particles as small as 1 micrometer.
Supply
Supply Shell Diala S4 ZX-l - Electrical Insulation Oil
- Shell Diala ensures safe transformer operation with high-efficiency insulation and cooling performance.
- It provides high resistance to electrical breakdown with strong and reliable insulation.
- It offers moderate viscosity and a high flash point for safe and stable operation.
- It is chemically stable and resists decomposition under normal operating conditions.
- It prevents chemical reactions, such as oxidation, within the transformer’s internal components.
- It uses gas-to-liquids technology to support high voltage, increased loads, and long oil life.
