WELCOME
PT. VOLTA TERAWINDO BHUWANA : Specializing In-Situ Power Generation Services.
Our commitment is to comply the International standard for safety, process handling, and quality for industrial services by improving our facility and personnel capability with adopted the concept of TOTAL SERVICES in terms of the International Quality Standards IEEE, IEC, ANSI/NEMA, VDE, EASA, NETA, GB/T and related the standards.
Our Service
Power Generation Services
- Condition assessment with Machine Scoring Index and BDV (Break Down Voltage) calculation method
Rewinding for all kind of brand and size of the rotating electric machinery, including for Turbo generators, Hydroelectric generators, Diesel / engine generators, all kind of the electric motors AC and DC.
Failure investigation and analysis the root cause
Test Provided
Performing by ELCID V5.5 EVOLUTION, is purpose to analysis the integrated core lamination quality in response to the hotspot entire the stator core lamination.
Performing with DELTA 4000 or CPC 100, is purpose to analysis the insulation winding quality in response to the void content due to insulation delamination and corona protection degradation in the slot region and end-winding areas
To analysis the ageing phenomenon in the winding insulation system due to moist absorption by applying injecting and releasing the current at low voltage for 1000 seconds.
Performing with impact energy instrument, is purpose to analysis the wedge loose tight in the slot, looseness these parts can causing insulation winding damaged due to free movement in the slot.ent
To analysis the end winding bracing and support, in response the end winding vibration due to electromagnetic force at tangential and radial direction.
DC Ramp / DC Current Leakage test: is purpose to analyzing the insulation tensile strength properties by applying DC voltage at each phase to ground with level max [80%*((2E+1)*1.7)] volts dc.
Black-out inspection is as part of a the HV generators and or HV motors inspection program.
This is a traditional offline inspection where the stator is placed in complete darkness, each phase is energized to 115% of rated line-to-neutral voltage, and both ends of the stator are observed to determine the presence, location and severity of endwinding surface partial discharges (PD).
The setup for the test may be complex and risky due to the need for observers to be standing in darkness close to the energized parts of the stator.
To observe the PD activity visualization we used an UV (ultra violet) camera, than the PD activity recorded and quantified through simultaneous offline PD measurements. and can be performing at indoor with ambient lighting and or outdor.
Recorded images and or video of the observed discharges and measured PD activity in the stator winding used to compare the evaluation by others test method.
Coupling Resistance Test
Cappacitance Mapping Test
IR/PI
DCR
RSO
Surge Comparison
AC Impedance
Pole Balance Volatge Drop
Project Experience
Our Projects
Major Repair and Outage Power Generation Supervision and job execution from the beginning process up to handing over for power plant commercial operation with Rewinding…
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Article : All about Power Generation
ELCID Test
ELCID test on new construction hydro Generator and turbo generator 400 MW Our EL CID facility is provided with 4 excitation cables, normally used for Hydro Generators, for the large turbo generators is require very long excitation cables, 40 meters or more…
Read MoreGENERATOR FAILURE INVESTIGATION
GENERATOR FAILURE INVESTIGATION Written by : Siswanto, Power Generation Engineer Insulation failure on the generator winding can caused by many factors, this paper provides examples of generator failure on generator 54 MVA, 13.8kV due to the stator winding insulation aging problems, caused…
Read MoreGENERATOR CONDITION ASSESSMENT METHODOLOGY
CONDITION ASSESSMENT METHODOLOGY Written by : Siswanto, Power Generation Engineer Failure of insulation is considered to be major factor in electrical rotating machine. Aging of insulation generally follows a chemical rate degradation curve and in addition is severely affected by the…
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