Transformers Test | Type Tests, Routine Tests and Special Tests
Industry Standards and Regulations:
IEC 60076 | Power Transformers |
ANSI/IEEE C57 Series | IEEE Standards for Transformers |
IEC 61869 | Instrument Transformers |
IEEE C37.100 | IEEE Standard for Definitions Applied to Power Switchgear |
IEC 62271 | High-voltage switchgear and control gear standards |
ANSI/IEEE C62 Series | IEEE Standards on Surge Protective Devices |
NEMA TR1 | Transformers, Regulators, and Reactors |
UL 1561 | Dry-Type General-Purpose and Power Transformers |
1. Routine Tests:
Measurement of Winding Resistance Test
Turns Ratio Test and Vector Group
Measurement of Core Loss
Measurement of Winding Loss and Impedance Test
Dielectric Type Test
Induced Overvoltage Withstand Test.
Power Frequency Voltage withstands Tests.
Bird Protection Test
Pressure Relief Device Operation
Oil Routine Test
2. Type Tests:
Oil Type Test
Temperature Rise Test
Impulse Voltage Withstand Test
Short Circuit Test
3. Special Tests:
Measurement No Load losses (100% lot quantity)
Measurement of Load Losses and Impedance Voltage (100% lot quantity)
Measurement of Winding Resistance
Measurement of Voltage Ratio (Turn Ratio) and Vector Group
- Dia Electric Test:
Induced Voltage Withstand Test
Power Frequency Voltage withstands tests.
Paint Thickness
Bird Protection Test at 8kV
Tank Pressure test
Pressure Relief Device Operation
Oil Routine Test
- Visual Dimension tests:
Overall Dimension of the tank and all extended fitting.
Core Assembly.
Weight HT, LT Winding, core, oil, tank, etc.
4. Diagnostic Tests:
Dissolved Gas Analysis (DGA)
Insulation Resistance Measurement
Partial Discharge Testing
Frequency Response Analysis (FRA)
Oil Quality Analysis
Bushing Insulation Power Factor Test
Tan Delta Test
Acoustic Noise Analysis
Thermography (Infrared Imaging)
Vibration Analysis
5. Periodic Maintenance Tests:
Oil Quality Analysis
Bushing Insulation Power Factor Test
Insulation Resistance Measurement
On Load Tap Changer (OLTC) Testing
Winding Resistance Test
Core Grounding Resistance Test
Dissolved Gas Analysis (DGA)
Acoustic Noise Analysis
Thermography (Infrared Imaging)
Vibration Analysis