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Transformers

Transformer Solid Insulation

• Insulation Resistance (IR)
• Polarization Index (PI)
• DC Absorption Test
• Capacitance & Tan Delta Test
• Leakage Current Test

Transformer Conductor & OLTC

• DC Winding Resistance.
• Ratio Test
• Phase Angle Error Test

Transformer Core & Winding

• Excitation Current Test
• Magnetic Current Test.
• Magnetic Balance Test
• Tan Delta & Capacitance Test

Transformer Bushings

• Tan Delta & Capacitance Test

Transformer Oil Analysis

• Specific Resistance (Resistivity)
• Dielectric Dissipation Factor (Tan Delta)
• Neutralization Value (Acidity)
• Sediment (Sludge)
• Flash Point
• Water Contents (PPM)
• Interfacial Tension
• Dielectric Strength (BDV)

Transformer Fault Determination

• Dissolved Gas Analysis
• Acoustic Partial Discharge
• Frequency Response Analysis
• Infrared thermography

Transformer Aging  & Contamination

• Furan Analysis
• PCB Analysis
• Metal Content
• Inhibitor Content
• Metal Sulphate

Transformer New Oil Acceptance

• Appearance
• Density
• Kinematic Viscosity
• Electric Strength
• Water Content
• Tan delta
• Resistively
• Interfacial Tension
• Flash Point
• Pour Point
• Neutralization Value
• Corrosive Sulphur
• Oxidation Stability
• Ageing Characteristic
• Presence of oxidation Inhibitor
• SK Value

Transformer Pre Commissioning

• Insulation Resistance Value (IR)
• Magnetizing Current Test
• Magnetizing Balance Test
• Short Circuit Test
• Vector Group Test
• Winding Resistance Test
• Ratio Test

Transformer Residual Life Assessment

• Furan Analysis as per IEC: 1198
• Degree Of Polymerization on Paper (DP)
• Metal Content
• Inhibitor Content
• PCB Analysis
• Metal Sulphate

Transformer Oil Composition (Base Product)

• PNA Analysis (Paraffinic, Naphthanic & Aromatic content)

Transformer Overhauling & Servicing

• Overhauling With Lifting Core coil Assembly & Nitrogen Purging
• Overhauling Without Lifting Core coil Assembly
• Leakage Arresting