Offnline Measurements

Condition Monitoring of Power Equipment - Transformer

Test on Transformer Solid Insulation :

1. Insulation Resistance (IR)
2. Polarization Index (PI)
3. DC Absorption Test.
4. Capacitance & Tan Delta Test
5. Leakage Current Test
6. Step up voltage
7. Furan Analysis

Tests on Transformer Conductor and OLTC :

1. DC Winding Resistance.
2. Ratio Test And Phase Angle Error Test
3. Floating Neutral Point Measurement

Tests on Transformer Core:

1. Excitation Current Test (at High Voltage)
2. Magnetic Current Test
3. Magnetic Balance Test
4. Sweep Frequency Response Analysis (SFRA)

Tests on Transformer HV Bushings:

Capacitance & Tan Delta Test

Tests on Transformer Oil:

1. Interfacial tension
2. Neutralization Number
3. Moisture Content
4. Flash Point
5. Sludge
6. Dielectric Dissipation Factor
7. Dielectric Strength
8. Resistivity
9. Kinematic Viscosity
10. Pour Point
11. Density

Dissolved Gas Analysis (DGA) on Transformer

1. Methane
2. Ethane
3. Ethylene
4. Acetylene
5. Carbon Dioxide
6. Carbon Monoxide
7. Hydrogen

Furan Analysis on Transformer Oil

1. 2-Furaldehyde
2. Furfural alcohol
3. 2-Acetylfuran
4. 5-Methyl-2-Furaldehyde

Dissolved Gas Analysis:

1. Methane
2. Ethane
3. Ethylene
4. Acetylene
5. Carbon Dioxide
6. Carbon Monoxide
7. Hydrogen

Loss Analysis on Transformer / Generator / Motor

1. No Load Loss
2. Load Loss
3. DC Winding Resistance

Transformer Oil Testing

Interfacial

1. Tension
2. Neutralization Number (Acidity)
3. Sludge
4. Dielectric Strength (BDV)
5. Flash Point
6. Dielectric Dissipation Factor (Tan Delta)
7. Moisture Content (PPM)
8. Resistivity

Electrical tests on HV Cable

1. Capacitance & Tan Delta test
2. Insulation Resistance
3. Polarization Index
4. DC Resistance
5. HV (DC) High pot test
6. DC Leakage Current Test
7. Leakage Current Test
8. VLF Testing (Very Low Frequency)

Electrical tests of Shunt Capacitors

1. Capacitance test
2. Tan Delta test
3. Insulation Resistance
4. Polarization Index
5. HV (DC) High pot test
6. DC Leakage Current Test

Condition Monitoring tests on Generators

1. Acoustic Partial Discharge
2. Thermography
3. Harmonic Analysis

Condition Monitoring tests on Motor

1. Capacitance & Tan Delta test
2. Insulation Resistance
3. Polarization Index
4. DC Resistance test
5. DC Leakage Current Test
6. AC Leakage Current Test
7. Surge test
8. Impendence test