List of Test.pptx guugjgujgufctdfdftddyd

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1. Testing Department

2. Why Testing on Transformer? Transformers are one of the most important elements in the electrical power system. Any failure in a transformer results in the disruption of electrical power supply to a large number of consumers. Hence, the reliability and the quality of transformers have to be of a very high order. One way of checking is testing. Testing ensure Production Process Testing validate Design Parameters

3. Routine Tests - List Sl. No. List of ROUTINE TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 1 Measurement of Winding Resistance          2 Measurement of Voltage Ratio (Turns-Ratio) and Check of Phase Displacement (Vector Group) / Polarity          3 Measurement of Short Circuit Impedance & Load Loss          4 Measurement of No-Load Loss & Current          5 Separate Source High Voltage (Power Frequency) Withstand Test         

4. Routine Tests - List Sl. No. List of ROUTINE TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 6 Induced Over-Voltage (Double Voltage Double Frequency) Withstand Test ü ü ü ü ü ü ü   7 Test of On-Load Tap-Changers, where appropriate   ü ü     ü ü   8 Oil Leakage Test ü   ü NA NA ü ü   9 Pressure Test ü   ü NA NA NA ü   10 Check of Core and Frame Insulation for Liquid-Immersed Transformer with Core or Frame Insulation     ü     NA ü  

5. Routine Tests - List Sl. No. List of ROUTINE TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 11 Check of the Ratio and Polarity of Built-in Current Transformer     ü     ü   12 Measurement of Insulation Resistance ü         ü   13 Partial Discharge Measurement (for Trf. ratings >3.6kV) NA NA NA   ü   ü 14 Measurement of Magnetic Balance of Core Assembly           ü  

6. Type Tests - List Sl. No. List of Type TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 1 Temperature Rise Test ü ü ü ü ü ü ü   2 Measurement of Sound Level     ü     ü ü   3 Measurement of No-Load & Current at 90% and 110% of Rated Voltage     ü     ü ü   4 Pressure Test ü         ü ü   5 Measurement of Power taken by the Fan and Liquid Pump Motor     ü     ü ü  

7. Type Tests - List Sl. No. List of Type TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 6 Measurement of Polarization Index           ü   7 On-Load Tap Changer Operational Test           ü ü   8 Lightning Impulse Withstand Test ü ü ü ü ü ü   ü 9 Short Circuit Withstand Test ü         ü   ü

8. Special Tests - List Sl. No. List of Special TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 1 Measurement of Sound Level ü ü   ü ü ü ü   2 Measurement of Harmonics of the No-Load Current   ü       ü   3 Oil Break Down Voltage ü     NA NA ü   4 No Load Current at 112.5% Voltage ü         ü   5 Measurement of Zero Sequnce Impedance   ü ü     ü ü  

9. Special Tests - List Sl. No. List of Special TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 6 Measurement of DC Insulation Resistance between each Windings to Earth and between Windings   ü ü     ü ü   7 Measurement of Dissipation Factor (tan-ƍ) of the Insulation System Capacitances   ü ü     ü ü   8 Paint Adhesion Test ü   ü     ü   9 Vaccum Deflection Test on Liquid Immersed Transformers     ü NA NA ü   10 Pressure Deflection Test on Liquid Immersed Transformers     ü NA NA ü  

10. Special Tests - List Sl. No. List of Special TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 11 Short Circuit Withstand Test ü ü ü ü ü ü   ü 12 Environmental Test NA NA NA   ü   ü 13 Climatic Test NA NA NA   ü   ü 14 Fire Behaviour Test         ü   ü 15 Partial Discharge Measurement       ü   ü   ü

11. Special Tests - List Sl. No. List of Special TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 16 Winding Hot-Spot Temperature Rise Measurements     ü       ü 17 Determination of Capacitances Winding to Earth and Between Windings   ü ü     ü ü 18 Determination of Transient Voltage Transfer Characteristics   ü ü       ü 19 Measurement of Frqunency Reponse (Frequency Response Analysis)     ü     ü   ü 20 Moisture Content of Transformer Oil ü     NA NA   ü

12. Special Tests - List Sl. No. List of Special TESTS for Transformers up to 33kV Class IS 1180 IS 2026 IEC 60076-1 IS 11171 IEC 60076-11 IEEE WPDT Test Lab Other Test Lab 21 Measurement of Dissolved Gases in Dielectric Liquid     ü NA NA ü   ü

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