At our state-of-the-art test lab, we ensure all transformers meet international quality standards, including IEC-76 and BS-171, by conducting rigorous measurements and tests prior to dispatch. Below is a comprehensive description of the tests we perform:
• Insulation resistance.
• DC resistance test of winding
• Resistance balance.
• Polarity test.
• Voltage ratio test
• High tension withstand.
• No load current. (Open circuit test)
• Copper losses (Full load loss or short circuit test)
• Vector group.
• Temperature rise test.
• Dielectric strength of oil.
• Impedance.
• Double voltage & Double frequency.
• High voltage test
1.Insulation Resistance
This test checks the quality of insulation between the transformer windings and between windings and earth. It ensures that the insulation can withstand electrical stresses during operation.
2. DC Resistance Test of Winding
This test determines the resistance of transformer windings under direct current, helping to identify potential faults such as short circuits or loose connections.
3. Resistance Balance
Resistance balance ensures that the windings of the transformer are evenly balanced. Unbalanced resistances may lead to inefficiencies and overheating.
4. Polarity Test
This test confirms the proper polarity of the windings, ensuring correct phase connections during parallel operation of transformers.
5. Voltage Ratio Test
The voltage ratio between the primary and secondary windings is checked to ensure it matches design specifications. Any deviation could impact transformer functionality.
6. High-Tension Withstand Test
This test assesses the ability of the transformer’s high-voltage windings to withstand overvoltage conditions without damage.
7. No-Load Current (Open Circuit Test)
This test measures the current drawn by the transformer under no-load conditions to determine the core losses and magnetizing current.
8. Copper Losses (Full Load Loss or Short Circuit Test)
This test measures the power loss in the transformer windings when the transformer operates at full load, ensuring efficiency.
9. Vector Group Verification
The vector group test verifies the phase displacement and connection type of the transformer, critical for parallel operation.
10. Temperature Rise Test
This test determines the transformer’s ability to operate safely at maximum temperature conditions by measuring the rise in temperature under full load.
11. Dielectric Strength of Oil
Transformer oil is tested for its dielectric strength to ensure proper insulation and cooling capabilities. This test detects contamination or degradation in the oil.
12. Impedance Test
Impedance is measured to confirm it falls within design specifications. Proper impedance ensures efficient energy transfer and fault current limitation.
13. Double Voltage & Double Frequency Test
This test assesses the transformer’s ability to handle overvoltages and abnormal frequency conditions without damage.
14. High Voltage Test
The high-voltage test subjects the transformer to voltages higher than its rated capacity to ensure it can withstand operational stresses.
Why Choose Us?
Our testing process guarantees that every transformer leaving our facility adheres to stringent international standards. With a commitment to quality and precision, we deliver reliable products for your needs.