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Quality Control and Tests
IEC 60076 Compliant Testing · Routine · Type · Special Tests
At Datsan Transformer, every unit we manufacture undergoes rigorous quality control procedures in accordance with the IEC 60076 standard. Our testing protocol is continuously improved to enhance product quality, and our laboratory is equipped with state-of-the-art instruments. Routine tests are performed in-house, while type tests such as short-circuit mechanical withstand are conducted in accredited external laboratories upon customer request.
Routine Tests
| Test Description | Standard Reference | Acceptance Criteria / Method |
|---|---|---|
| Winding Resistance Measurement DC resistance of all windings |
IEC 60076-1 Clause 10.1 |
±2 % maximum deviation between phases; comparison with design values |
| Insulation Resistance Measurement Megger test between windings and to earth |
IEC 60076-1 Clause 10.2 |
Minimum 1000 MΩ at 500 VDC; no sudden drop during test |
| Turns Ratio & Vector Group Voltage ratio measurement, phase displacement verification |
IEC 60076-1 Clause 10.3 |
Ratio deviation ≤ ±0.5 %; vector group confirmed per nameplate |
| Short-Circuit Impedance Zk measurement at rated current |
IEC 60076-1 Clause 10.4 |
Within ±10 % of guaranteed value; phase balance within ±3 % |
| No-Load Loss & Current P0 and I0 measurement at rated voltage |
IEC 60076-1 Clause 10.5 |
Losses ≤ guaranteed +15 %; excitation current ≤ guaranteed +30 % |
| Load Loss Pk measurement at rated current |
IEC 60076-1 Clause 10.6 |
Losses ≤ guaranteed +15 %; reference temperature corrected |
| Induced Voltage Test Overvoltage withstand of insulation |
IEC 60076-3 Clause 11.2 |
No collapse or partial discharge exceedance (if PD measurement applied) |
| Applied Voltage Test Separate source AC withstand |
IEC 60076-3 Clause 11.1 |
Withstand specified test voltage for 60 seconds without breakdown |
Type Tests
| Test Description | Standard Reference | Acceptance Criteria / Method |
|---|---|---|
| Temperature Rise Test Heat run test at rated load |
IEC 60076-2 Clause 7 |
Top oil temperature rise ≤ 60 K (or 65 K per design); winding ≤ 65 K |
| Lightning Impulse Test Full and chopped impulse waves |
IEC 60076-4 Clause 7 |
No flashover or disruptive discharge; voltage waveforms comply with standard |
| Short-Circuit Mechanical Withstand Dynamic stability verification |
IEC 60076-5 Clause 8 |
No mechanical damage; impedance variation ≤ 2 % after test; no visible deformation |
Special Tests
| Test Description | Standard Reference | Acceptance Criteria / Method |
|---|---|---|
| Noise Level Measurement Sound pressure / power level |
IEC 60076-10 Clause 5 |
Guaranteed LWA value; measured in semi-anechoic or reflective conditions per standard |
| Zero-Sequence Impedance For three-phase transformers |
IEC 60076-1 Clause 10.9 |
Measured value reported; used for system protection coordination studies |
| Partial Discharge Measurement For Um ≥ 72.5 kV (optional) |
IEC 60076-3 Annex A |
PD level ≤ 100 pC at 1.5 Um/√3; ≤ 200 pC at 1.3 Um/√3 |
Our Testing Infrastructure
In-House HV Laboratory
Equipped with modern testing equipment capable of performing all routine tests up to 36 kV class, ensuring full control over quality and delivery timelines.
Accredited Type Tests
Short-circuit withstand, impulse voltage, and temperature rise tests are conducted in collaboration with internationally accredited laboratories (KEMA, CESI, etc.).
Digital Documentation
All test results are digitally recorded and traceable. Comprehensive test reports are provided with every transformer, ensuring full transparency.
Note: All routine tests are performed on 100% of units before shipment. Type tests are conducted according to project specifications and verified by accredited third-party laboratories upon customer request. Special tests are available as optional add-ons per customer requirements.
Transformer Manufacturer
DATSAN Transformer manufactures oil-immersed distribution and power transformers for industrial, utility, and infrastructure projects worldwide. Established in 1992, DATSAN combines over 30 years of engineering experience with modern manufacturing and testing capabilities. Our products are designed in accordance with IEC 60076, ANSI C57 and relevant international standards, with Ecodesign-compliant options available upon request.