Substation Equipment Commissioning

  • Power Transformer

    Installation (Erection) - Vacuuming and Vacuum Filling, Oil Processing or Oil Regeneration, ensure Dew Point or Saturation Ratio of less than 0.5 Maintenance (Upgrading and Repairs).

    Electrical Commission Testing (Site Acceptance Testing (SAT))

    1. Power Factor (PF) or Doble Testing.
    2. Insulation Resistance Testing (IR)
        a). Dielectric Absorption Ration (DAR).
        b). Polarization Index (PI) Test.
    3. Transformer Turn Ratio (TTR)-Vector Testing.
        Vector Testing.
    4. Bushing Testing.
    5. Load Tap Changer (LTC) Testing and Maintenance.
    6. Transformer Winding Testing.
    7. Current Transformer (CT) testing.
    8. Sweep Frequency Response Analysis (SFRA).
    9. Leakage Reactance Test
    10. Partial Discharge Testing
    11. Transformer Oil Testing.
        a). Dielectric or Insulation Oil Analysis.
        b). Dissolved Gas Analysis (DGA).
        c). PCB, Furan Analysis and Water content.
    12. Accessories Testing and Calibration.
        a). Buchholz Relay Testing.
        b). Pressure Relief Device (PRD) Testing.
        c). Temperature Gauges.
        d). Conservator Oil Level Gauge.
        e). Cooling Devices (Fans).
        f). Pumps.

  • Installation (assembly) - Vacuuming and Vacuum Filling, Gas testing, ensure Dew Point or Saturation Ratio of less than 0.5 , Maintenance (Upgrading and Repairs).

    Electrical Commission Testing (Site Acceptance Testing (SAT)).

    a. Contact Timing Test (Trip and Close Contacts Operation, Auxiliary Contacts Operation).
    b. Dynamic Resistance Test.
    c. Coil Current Measurement.
    d. Motion Analysis (Contact travel and speed data).
    e. Bushing Testing (Doble).
    f. CT testing.
    g. Insulation Resistance (IR) Testing.

    Protective Relay.

    a. Primary and Secondary Injection Test. b. Setting Test-Verify Setting (Breaker trip and close Inhibit, 86 Lock out). c. Insulation Resistance (IR) testing. d. System Function Test (Pick up, Alarms, Faults counters etc.). e. Protective relay Element Testing (50-Instantaneoes Overcurrent, 51-Time Overcurrent, 87-Differential, 79-Reclosing, 81 Frequency relay etc.). f. Proficient with SEL, GE, ABB Relays

    Transmission Cable:.

    a.AC Hi-Pot & Cable Commissioning.
    b. Cables Partial Discharge.

    Primary Injection Testing.

    a.Circuit Breaker Trip Command.
    b. Instrument Transformer Polarity and ratio test.