Services
Transformer Testing & Diagnostics
At US-ELECTRIC we perform electrical testing and diagnostics on dry-type and oil-filled transformers, in the lab and in the field. We comply with NMX-J-169-ANCE and NMX-J-351-ANCE standards, ensuring the quality, safety, and reliability of every unit.
Laboratory testing
- Polarity and phasor diagram
- Transformation ratio
- Phase sequence
- Winding ohmic resistance
- No-load losses and excitation current
- Insulation resistance
- Applied and induced voltage
- Tightness and power factor
- Acceptance and commissioning testing
- Preventive and predictive maintenance
- Power factor and tan delta
- Infrared thermography
- Power quality and short-circuit studies
- Protection coordination
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