High Voltage Technical Services

Silcar’s High Voltage Technical Services Division has a specialist diagnostic High Voltage testing capability. Technical Services staff utilise specialised condition monitoring and diagnostic equipment to quickly and accurately establish the condition of HV plant.

Silcar Technical Service Group provides the following tests:

 

Power Transformers

Sweep Frequency Response Analysis (SFRA)

Dielectric Response Analysis (DIRANA)

Winding Dielectric Loss Angle (DLA)

HV Bushing DLA

Winding Insulation Resistance (IR)

Polarisation Index (PI)

Winding Resistance (Through taps- HV)

Low Voltage Impedance

Low Voltage Induce

Low Voltage No-Load Loss & Load Loss

Separate Source

Single Phase Excitation (Through taps)

Surge Arrestors – IR & DLA

Winding & Oil Temperature Indicator Calibration/Check

Auxiliary Controls

Visual Inspection

Condition Monitoring Report

 

Rotating Machines:
Stator Core:
Inspection Services

Core Lamination Tightness

Thermography

Electromagnetic Core Imperfection Detector (El-Cid)

Ring Flux (c/w Thermograhpy)

Stator Winding:
Insulation Resistance (IR)

Polarisation Index (PI)

Winding Dielectric Loss Angle (DLA) - Power Frequency up 25kV AC

Off – Line Partial Discharge (PD) - Power Frequency up to 25kV AC

DC Resistance

DC Controlled Overvoltage (DCCO)

AC & DC Hi – Pot

Rotor Winding:
Recurrent Surge Oscillograph (RSO)

Off – Line at stand still / speed

Air Gap Flux Probe – On Line

Current Spectrum Analysis – On Line

Residual Magnetisms

Insulation Resistance (IR)

Polarisation (PI)

Resistance

Impedance

AC High Potential

Pole Balance

High Voltage Cables:
Insulation Resistance

AC High Potential (Power Frequency & VLF)

DC High Potential

Dielectric Loss Angle (DLA)