01 / ACCEPTANCE REVIEW
Agree the test schedule
Define applicable routine tests and any required type or special tests, including acceptance limits, report language and customer requirements.
JIADEST / FACTORY INSPECTION & ACCEPTANCE
From measurement. To documented acceptance.
The test schedule connects the approved transformer specification with factory inspection and acceptance. Review the measurements, test conditions, applicable standard and documentation required for your project.
Electrical inspection on the production line
A technician connects portable electrical test instruments to transformer terminals. The inspection station serves a row of assembled units.
Materials inspection laboratory
Laboratory staff examine samples with a microscope and benchtop instruments, supporting incoming-material inspection and production quality control.
FACTORY PHOTOGRAPHS / INSPECTION TO DISPATCH
Real equipment. Hands-on checks.
Test instruments & operator controls
Close-up views of a transformer ratio instrument and an operator control panel. Readings belong to the photographed setup; the unit-specific test report records the applicable results.
Hands-on inspection
Factory personnel examine transformer assemblies at the workstation. Inspection brings together visual checks, connection review and the agreed production documentation.
Electrical test connections
A close-up of test leads attached to the transformer assembly. The connection arrangement is checked against the selected measurement procedure before results are recorded.
Protective packing preparation
A factory worker secures wooden packing cases before dispatch. Packing requirements and release documentation are agreed for the order and transport conditions.
FACTORY ACCEPTANCE / TEST DOCUMENTATION
Measurements that matter to your project.
Agree the test programme before production. The applicable standard, transformer construction, voltage class and technical specification determine the required routine, type and special tests.
| Test / measurement | What it verifies | Data to record | Application & scope |
|---|---|---|---|
| Winding DC resistance | Review winding continuity and connection resistance. | Resistance (Ω or mΩ), winding temperature, phase and tap position. | Measurement scope and temperature correction defined for the selected winding design. |
| Voltage ratio & phase displacement | Verify the voltage transformation and winding connections. | Measured ratio, deviation (%), tap position, polarity or vector group. | Applicable phases and tap positions listed in the agreed test schedule. |
| No-load loss & no-load current | Assess core performance at the specified excitation. | Loss (W), excitation current (%), test voltage and frequency. | Test conditions and acceptance limits taken from the approved specification. |
| Load loss & short-circuit impedance | Review winding losses and the transformer impedance. | Load loss (W), impedance (%), current and reference temperature. | Rated power, tap position and correction conditions identified in the report. |
| Applied & induced AC withstand | Verify insulation under the prescribed electrical stresses. | Test method, voltage (kV), frequency (Hz), duration (s) and result. | Dielectric programme selected for the insulation level and applicable standard. |
| Partial discharge measurement | Assess discharge activity in the insulation system. | Apparent charge (pC), test voltage, background level and calibration reference. | Included for dry-type power transformers where required by IEC 60076-11; other duties follow the applicable test programme. |
| Oil-filled construction checks | Review tank integrity and insulating-liquid requirements. | Specified leak/pressure test record and oil-quality test results, where included. | Applicable to oil-immersed units; oil tests and report requirements agreed for the order. |
| Additional type & special tests | Verify agreed design or application requirements. | Examples: temperature rise (K), sound level (dB), impulse voltage (kV) or other specified results. | Classification, applicability, test location and witness arrangements confirmed by technical agreement. |
This guide describes the information to agree and review. Actual values and acceptance results belong to the serial-number-specific factory test report. Test location, instrument capability and any independent laboratory involvement are confirmed for the order.
A report linked to your transformer.
- Model, serial number, rated power, voltages and frequency
- Applicable standard, test method and agreed acceptance criteria
- Instrument identification, calibration references and test conditions
- Measured results, conclusions, test date and authorized sign-off
TEST AREA / OPERATOR CONTROL STATION
The people and equipment behind the checks.
A factory operator attends the control console overlooking the adjoining electrical test area. The inspection team, test equipment and documented methods form part of the acceptance review.
Confirm the test location, instrument range, calibration references and required reports for the selected transformer.
02 / ACCEPTANCE REVIEW
Plan witness points
Discuss customer or third-party attendance, inspection milestones and notice periods before the production schedule is finalized.
03 / ACCEPTANCE REVIEW
Review the release documents
Check unit identification, test results, authorized sign-off and the agreed drawings and handling information before shipment.
TALK TO JIADEST
Build the test schedule for your project.
Share your rated capacity, voltages, application and destination. Our team can review the configuration and documentation required for your order.