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
Customer
CNT TRANSFORMERS B2B customers are listed public and private limited companies across India.
Equipment Financier

Tushar Shinde is the founder, promoter and business owner-proprietor of CNT TRANSFORMERS established in year 2004.
Contact us
✆ 9321690034
✉ cnt@cnt.org.in
www.cnt.org.in
Tushar Shinde
Proprietor
CNT TRANSFORMERS
Badlapur, Mumbai MMR 421503 India
Pithampur, Indore IMR 454775 India
Masat, Silvassa 396230 India