SCOPE OF SERVICE

Special Electrical Service

·       On-line and Off-line PD on generator, motor, cable etc.

·       Frequency resonance (Bump) test on generator stator winding

·       ELCID test on generator stator core

·       High Potential Test (HIPOT)

·       Recurrent Surge Oscillograph (RSO) on rotor field winding

·       Protective relay testing

·       Automatic Voltage Regulator (AVR) testing

·       Battery load test 

·       Stator wedge tightness tapping and mapping

                                                                 ·       Replace stator wedge

                                                                 ·       Repair Partial Discharge (PD) on generator / motor winding

Routine Electrical Service 

Generator (Stator & Rotor) & Exciter

·       Visual inspection: to find corona disorder, insulation discoloration, cracks, spacer block damage, laminate sheet of stator and rotor core damage, flexible lead and terminal bus bar problem, and checking tightness of through bolt and Footing  bolt as well as for Stator-Rotor slot wedge, including solving each problem with proper and qualified spare parts and methods

·       Electrical test: to detect any disorder by electric used method namely

STATOR

o   Electromagnetic Core Imperfection Detection ELCID test

o   Stator wedge tightness test and mapping

o   Offline Partial Discharge test

o   Insulation resistance and polarization index test

o   Insulation power factor test

o   Winding resistance measurement

o   Winding impedance measurement

o   Winding capacitance measurement

ROTOR

o   Insulation resistance and polarization index test

o   Pole balance test

o   Winding resistance measurement

o   Winding impedance measurement

o   Winding capacitance measurement

o   Recurrent Surge Oscillograph (RSO)

Power Transformer

·       Insulation resistance and polarization index test

·       Insulation power factor test

·       Turn Ratio

·       Winding resistance measurement

·       Winding impedance measurement

·       Exciting current test

·       Dielectric breakdown

Current Transformer

·       Visual Inspection, Clean

·       Insulation resistance test

·       Resistance test

·       Turn ratio test

·       Exciting current test

·       Loop circuit

Potential Transformer

·       Visual Inspection, Clean

·       Insulation resistance test

·       Resistance test

·       Turn ratio test

·       Insulation power factor test

·       Loop circuit

Power Circuit breaker

·       Visual Inspection, Clean

·       Insulation resistance test

·       Insulation power factor test

·       Contact resistance test

·       Timing test

·       Function test

Surge Arrester, Surge Capacitor

·       Visual Inspection, Clean                         

·       Insulation resistance test

·       Insulation power factor test

·       Capacitance Measurement

LV/MV Circuit Breaker

·       Visual Inspection, Clean                         

·       Insulation Resistance Test

·       Trip Unit Trip Test

·       Contact Resistance Test

·       Function test