High Voltage Testing
Integral Power Testing and Commissioning Engineers undertake extensive testing and commissioning of your assets using state-of-the-art, professionally calibrated test equipment, fully traceable to a NATA accredited body under ILCAS. Test results obtained during testing are compared against FAT results, manufacturer’s publications, relevant Australian and International standards. Poor matches are investigated and rectified where possible, whereas, other issues are promptly reported to client.
Site Acceptance Tests (SAT) carried by Integral Power Testing and Commissioning Engineers covers the entire range of High Voltage Tests, including:
Power Transformers
- Turns Ratio (TTR)
- Excitation Current
- Insulating Oil Tests (Dissolved Gas Analysis (DGA) & Standard Oil Test)
- DC Winding Resistance
- Vector Group
- DC Insulation Resistance
- Insulation Power Factor/ Dissipation Factor/ Tan Delta (Tanδ)
- Zero Sequence Impedance
- Sweep Frequency Response (SFRA)
- Primary Through Injection
- Transformer Differential Stability
- Tap Changer Continuity & Ratio
- Calibration of thermal sensors
- Standard Oil Test and Dissolved Gas Analysis (DGA)
- Ancillary Protection Testing
Current Transformers (CTs)
- CT Polarity
- CT Circuit Continuity
- CT Ratio & Phase Error
- CT Secondary DC Resistance
- CT Excitation/Magnetisation Curve
- CT Primary & Secondary DC Insulation Resistance
- CT Burden Measurement
- Three Phase Primary Injection
- CT Knee Point Current & Voltage Measurements
Voltage Transformers (VTs)
- VT Circuit Continuity
- VT Ratio
- VT Burden
- VT Primary & Secondary Insulation Resistance
- VT Phase and Magnitude Error
- VT Excitation curve
- VT Winding resistance
- VT Secondary burden
- VT Dielectric withstand/ HiPot
Earthing Systems
- Soil Resistivity
- Earthing Inspection
- Earth Grid Continuity
- Current Injection Testing (CIT)
- Step and Touch Potential
- Earthing System Resistance
Circuit Breakers
- Static Contact Resistance
- Dynamic Contact Resistance
- Coil Current Analysis
- Charging Motor Current Analysis
- Motion/Contact Travel Test
- Under-Voltage Condition Test
- Circuit Breaker Timing
- Minimum Pick-up
- Insulation Power Factor/ Dissipation Factor/ Tan Delta (Tanδ)
- Circuit Breaker Trip & Open Checks
- DC Insulation Resistance
- Online Partial Discharge
- Protection Relay Trip Checks
Busbars
- Online Partial Discharge
- Contact Resistance
- Insulation resistance
- High Voltage Withstand (HiPot)
- Primary Injection
- Bus Zone Differential Stability
Disconnectors & Earth Switches
- Contact Resistance
- Insulation Resistance
Surge Arrestors & HV Bushings
- Contact Resistance
- Insulation Resistance
- Insulation Power Factor/ Dissipation Factor/ Tan Delta (Tanδ)
Power Lines
- Positive & Zero Sequence Impedance
- Earth Fault Current Compensation Factor
- Mutual Coupling between Parallel Lines, coupling impedances between power lines, signal cables & pipelines
High Voltage Cables
- High Voltage Withstand (VLF)
- VLF Tan Delta / Dissipation Factor
- Sheath Withstand
- Online Partial Discharge
- Offline Partial Discharge
- DC Insulation Resistance
Generators
- Stator DC Winding Resistance
- Stator Zero, Positive & Negative Sequence Impedance
- Rotor AC and DC impedance
- DC Insulation Resistance & Polarisation Index
- Insulation Power Factor/ Dissipation Factor/ Tan Delta (Tanδ)
- Partial Discharge
