Special Equipment Testing

Transformer & GIS BushingsTesting

Specialized Testing Services:

1. Tan Delta / Power Factor Testing:

   • Measures dissipation factor (tan δ) or power factor to assess insulation condition.

   • Detects moisture, contamination, and aging in bushing insulation.

2. Capacitance Measurement (C1 / C2):

   • Determines capacitance values of bushing components to identify deviations or defects.

   • Supports combined analysis with Tan Delta testing for accurate insulation assessment.

3. Partial Discharge Testing:

   • Detects localized insulation defects or corona activity within bushings.

   • Enables preventive maintenance by identifying potential failure points early.

4. Insulation Resistance Measurement:

   • Measures resistance between conductors and earth.

   • Confirms overall insulation integrity for safe operation under rated voltage.

Benefits of Specialized Testing:

• Provides early detection of insulation degradation and internal defects

• Supports predictive maintenance and reduces risk of unplanned outages

• Ensures reliable operation of high-voltage bushings in transformers and GIS

• Facilitates compliance with international insulation testing standards

Bushings are critical components that provide safe electrical connection through earthed enclosures in transformers, GIS, and other high-voltage equipment. Ensuring the integrity of bushings is essential to prevent insulation failures, outages, and costly equipment damage. Specialized testing services evaluate the electrical and insulation condition of bushings, helping to identify deterioration, moisture ingress, or manufacturing defects before they compromise system reliability.