CNT TRANSFORMERS undertake testing of Transformer Oil, Power Transformers, Current Transformers, Potential Transformers, Residual Voltage Transformers and Current Limiting Reactors.

Testing of Transformer Oil
❖ Electrical Properties Analysis
    ✦ Dielectric Strength Test
    ✦ Dielectric Dissipation Factor Test
    ✦ Specific Resistance Test
❖ Chemical Properties Analysis
    ✦ Neutralization Value Test
    ✦ Water Content Test
    ✦ Sediments & Sludge Test
❖ Physical Properties Analysis
    ✦ Physical condition & Appearance Test
    ✦ Density Test
    ✦ Flash Point Test
    ✦ Inter Facial Tension Test
    ✦ Kinematic Viscosity Test
    ✦ Pour Point Test
❖ Power Transformer Internal Fault Analysis
    ✦ Dissolved Gases Analysis (DGA)
        ★ Total Dissolved Combustible Gas
        ★ Concentration of component gases
            ⚬ Hydrogen H2
            ⚬ Oxygen O2
            ⚬ Nitrogen N2
            ⚬ Carbon Monoxide CO
            ⚬ Carbon Dioxide CO2
            ⚬ Methane CH4
            ⚬ Ethane C2H6
            ⚬ Ethylene C2H4
            ⚬ Acetyline C2H2
            ⚬ Propane C3H8
            ⚬ Propylene C3H6
❖ Power Transformer Remnant Life Assessment
    ✦ FURAN Analysis
    ✦ 2,6-di-tert-Butyl p-Cresol (DBPC) Analysis &
      2,6-di-tert-Butyl Phenol (DBP) Analysis
❖ Transformer Oil Remnant Life Assessment
    ✦ Polychlorinated Biphenlyls (PCB's) Analysis
    ✦ Corrosive Sulphur Test
    ✦ Oxidation Stability

Testing of Power Transformer
❖ Insulation Condition Analysis
    ✦ Insulation Resistance & Polarization Index Test
    ✦ Dissipation Factor (Tan δ) Test of Insulation Capacitance
    ✦ Capacitance Test
    ✦ Induced High Voltage Test
    ✦ Power Frequency High Voltage Test
    ✦ Double Frequency High Voltage Test
❖ Winding Condition Analysis
    ✦ HV Winding Resistance Test at 75℃
    ✦ LV Winding Resistance Test at 75℃
    ✦ Thermography Test
❖ Core-Coil Assembly Condition Analysis
    ✦ Verification of Terminals & Polarity Test
    ✦ Magnetic Balance Test
    ✦ Magnetization Current Test
    ✦ No Load Loss Test
    ✦ No Load Current Test
    ✦ No Load Current Harmonics Test
    ✦ Full Load Loss Test
    ✦ Short-Circuit Impedance Test
    ✦ Zero-Sequence Impedance Test
    ✦ Ratio Test on all tap position
    ✦ Vector Group Test
    ✦ Sweep Frequency Response Analysis Test
    ✦ Sound Level Test
❖ On-load Tap-Changer Assembly Condition Analysis
    ✦ Operation Test
    ✦ Auxiliary Circuit Insulation Test
❖ Control Simulation Analysis
    ✦ MOG Operation Test
    ✦ Buchholz Relay Operation Test
    ✦ OSR Operation Test
    ✦ PRD Test Operation Test (Main tank)
    ✦ PRD Test Operation Test (OLTC tank)
    ✦ OTI Calibration Test
    ✦ WTI Calibration Test
❖ Earthing Pit Analysis
    ✦ Earth Resistance Test

Testing of Current Transformer
❖ Insulation Condition Analysis
    ✦ Insulation Resistance Test
    ✦ Tan Delta (Tan δ) & Capacitance Test
    ✦ Overvoltage Interturn Test
    ✦ Power Frequency High Voltage Test
    ✦ Double Frequency High Voltage Test
❖ Winding Condition Analysis
    ✦ Primary Winding Resistance Test at 75℃
    ✦ Secondary Winding Resistance Test at 75℃
    ✦ Thermography Test
❖ Core-Coil Assembly Condition Analysis
    ✦ Verification of Terminals & Polarity Test
    ✦ Magnetization Curve Test
    ✦ Knee Point Voltage Test
    ✦ Composite Error Test
    ✦ Ratio Error Test
    ✦ Phase Angle Error Test
    ✦ Temperature Rise Test

Testing of Potential Transformer
❖ Insulation Condition Analysis
    ✦ Insulation Resistance Test
    ✦ Capacitance & Tan Delta (Tan δ) Test
    ✦ Induced High Voltage Test
    ✦ Power Frequency High Voltage Test
    ✦ Double Frequency High Voltage Test
❖ Winding Condition Analysis
    ✦ Primary Winding Resistance Test at 75℃
    ✦ Secondary Winding Resistance Test at 75℃
    ✦ Thermography Test
❖ Core-Coil Assembly Condition Analysis
    ✦ Verification of Terminals & Polarity Test
    ✦ Ratio Error Test
    ✦ Phase Angle Error Test
    ✦ Temperature Rise Test

Testing of Residual Voltage Transformer
❖ Insulation Condition Analysis
    ✦ Insulation Resistance Test
    ✦ Capacitance & Tan Delta (Tan δ) Test
    ✦ Induced High Voltage Test
    ✦ Power Frequency High Voltage Test
    ✦ Double Frequency High Voltage Test
❖ Winding Condition Analysis
    ✦ Primary Winding Resistance Test at 75℃
    ✦ Secondary Winding Resistance Test at 75℃
    ✦ Thermography Test
❖ Core-Coil Assembly Condition Analysis
    ✦ Verification of Terminals & Polarity Test
    ✦ Open Delta Test
    ✦ Ratio Error Test
    ✦ Phase Angle Error Test
    ✦ Temperature Rise Test

Testing of Current Limiting Reactor
❖ Insulation Condition Analysis
    ✦ Insulation Resistance Test
    ✦ Capacitance & Tan Delta (Tan δ) Test
    ✦ Power Frequency High Voltage Test
    ✦ Double Frequency High Voltage Test
❖ Winding Condition Analysis
    ✦ Winding Resistance Test at 75℃
    ✦ Thermography Test
❖ Coil Assembly Condition Analysis
    ✦ Reactance Test
    ✦ Temperature Rise Test
    ✦ Full Load Loss Test
    ✦ Short-Circuit Impedance Test

Contact us

✆ 9321690034
    9320690034
    9820690034
✉ cnt@cnt.org.in
     www.cnt.org.in
        

Tushar Shinde
Proprietor
CNT TRANSFORMERS
MIDC, Badlapur, Thane 421503, India