Transformer Testing
We use the latest transformer diagnostic testing techniques which, combined with our strategic relationship with Omicron (
www.omicron.at/en), provide a comprehensive assessment of transformer health.
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When to test transformers
- Whenever a new transformer is commissioned
- Routinely during their lifetime, to monitor changes in condition
- Following repairs
- To diagnose faults
Business benefits for transformer testing
- Develop Health Indices to estimate End of Life
- Check condition following fault conditions or overloading
- Extend transformer life
- Maintain high utilisation of existing transformers
- Improve loading capabilities
- Identify transformers at risk of failure
- Prevent expensive and disruptive failures
- Minimise replacement costs
- Improve decision making for future load requirements
- Improve safety
5 Diagnostic Testing Options
1. Static & Dynamic Resistance & Impedance Measurement
TECHNIQUES
- Computer controlled injection of test voltages from 15 - 400Hz
- Dynamic response analysis of tap changer operation
BENEFITS
- Establish winding condition and early detection of faults
- Cost effective analysis of tap changer condition
2. Tan Delta Testing
TECHNIQUES
Measure capacitance of windings and bushings
BENEFITS
- Detects bushing condition, thus preventing disruptive failures
- Establishes winding and core integrity, providing valuable condition information
3. Frequency Response Analysis
TECHNIQUES
- Injects test voltages from 10 - 20MHz
BENEFITS
- Detects transformer faults prior to disruptive failures - a key condition assessment tool
4. PDC-FDS Measurement
TECHNIQUES
- Utilises patented Dirana technique to determine moisture levels in solid insulation
BENEFITS
- Accurately establishes moisture levels to ensure effective moisture management processes, leading to extended transformer life
5. Partial Discharge Measurement
TECHNIQUES
- Locational analysis of Partial Discharge (PD) activity
BENEFITS
- Key tool to assist in cost-effective decision making on transformers with PD activity present