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Testing & Commissioning

“The success of any power project is attributable to the effective & Quality testing and commissioning of the entire project.”

The success of any power project is attributable to the impeccable testing and commissioning of the entire project. It is because the time and cost factors have a significant role in these projects and the success relies upon the optimum utilization of the resources without causing any safety hazards. We at Laxmi Associates are committed to provide a strategically planned process for the testing and commissioning of the power projects without any delay or additional cost. 

LA is specialized in testing & commissioning services for power system equipment, complete sub-station including GIS & Switchyards upto 765 kV in India.

HV / EHV TRANSFORMERS

On-site Diagnostic Testing of HV / EHV class of Transformers:

Our experience spans across power transformers of all voltage class upto 1200 kV and rating upto 500 MVA.

  • Voltage Ratio and Vector group confirmation test,
  • Frequency Response Analysis (FRA),
  • No-load excitation current measurement
  • Capacitance and dissipation factor measurement of the inner insulation
  • Capacitance and dissipation factor measurement of high-voltage bushings
  • Impedance measurements (short-circuit impedance, zero sequence impedance, FRSL method)
  • Analysis of winding damages with the FRA method
  • Moisture analysis of paper insulation by dielectric method (PDC+ FDS).
  • OLTC operation and dynamic contact resistance measurement
  • Winding Resistance Measurement
  • Thermography , Noise , Vibration Measurement
  • Routine Oil test, DGA, Furan
  • DP test of paper insulation.
  • On line & Off line Partial discharge measurements of  transformers

CURRENT TRANSFORMERS

On-site Testing of the HV/EHV class of Current Transformers

It is intended to perform automatic testing by CT Analyser on-site for utilities with very less testing time or by Primary injection test. The following tests can be performed:

 

  • Burden & CT winding resistance measurement
  • CT excitation characteristic according to IEC 60044-1, IEC 60044-6 (TPS, TPX, TPY) and IEEE C57.13. for knee-point voltages (up to 15 kV).
  • CT ratio & phase angle error measurement 
  • CT phase and polarity measurement
  • Determination of accuracy limiting factor, instrument security factor,
  • Test of CTs for knee-point voltages (up to 15 kV).
  • Capacitance and dissipation factor measurement of the inner insulation
  • Capacitance and dissipation factor measurement of high-voltage bushings
  • Moisture analysis of paper insulation dielectric method (PDC+ FDS) 
  • DGA test of oil.
  • On line & Off line Partial discharge measurements of CT.

CVT & PT

On-site Testing of the HV/EHV class of Potential Transformers and CVTs

  • Capacitance and dissipation factor measurement
  • Primary injection & Ratio test.
  • Moisture analysis of paper insulation by dielectric method (PDC+ FDS).
  • IR value with Polarization Index (PI) & Absorption Index (AI),
  • DC Resistance measurement
  • On line & Off line Partial discharge measurements.

SURGE ARRESTORS

On-site Testing of the HV/EHV class Surge Arrestors

  • On-line Leakage Current measurement (LCM) based on third harmonic resistive current.
  • Capacitance and dissipation factor measurement of insulation on per stack basis
  • IR value with Polarization Index (PI) & Absorption Index (AI),

CIRCUIT BREAKERS

 On-site Testing of Circuit Breakers

  • Circuit Breaker Operation times, like C, O, C-O, O-C-O & Pole synchronization time 
  • Trip & Close Coil Current  
  • Static Contact Resistance Measurement
  • Dynamic Contact Resistance Measurement for Main & Auxiliary contact
  • Capacitance and dissipation factor measurement of the inner insulation 
  • On line & Off line Partial discharge measurements.

POWER CABLE

On-site Testing of Power Cable

  • Capacitance and dissipation factor measurement of the inner insulation by VLF Test
  • On line & Off line Partial discharge measurements.

GIS

On-site Testing of Overall GIS System

  • On line & Off line Partial discharge measurements.

MOTOR

On-site Testing of Motor

  • Thermography, Noise, Vibration Measurement
  • On line & Off line Partial discharge measurements.
  • On-line Motor Current Signature Analysis for fault identification in Motor

GENERATOR

On-site Testing of Generator

  • Capacitance and dissipation factor measurement of the inner insulation
  • Rotor impedance , RSO diagnostics
  • IR value with Polarization Index (PI) & Absorption Index (AI),
  • DC Resistance Test.
  • On line & Off line Partial discharge measurements.

INTERESTED TO CARRYOUT TESTING & COMMISSIONING ?