When it comes to transformer reliability, precision testing is not optional — it is essential. At Transformer Field Services, a division of Free State Transformers, we provide comprehensive transformer testing services using industry-leading Omicron test sets, widely regarded as the best diagnostic equipment available globally.
Our specialised field teams ensure that power transformers, distribution transformers, and protection systems operate safely, efficiently, and in full compliance with industry standards.
Why Transformer Testing is Critical
Regular transformer testing helps:
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Prevent unexpected breakdowns
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Detect insulation deterioration early
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Identify winding deformation
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Verify protection relay functionality
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Extend transformer lifespan
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Ensure operational compliance
Whether during commissioning, routine maintenance, or after a fault event, professional transformer diagnostic testing is essential for asset protection.
Transformer Tests We Perform
We exclusively use Omicron testing equipment to ensure high accuracy, repeatability, and reliable diagnostic results.
1) Insulation Resistance Testing
Measures insulation condition between windings and earth. Critical for identifying moisture ingress and insulation degradation.
2) Transformer Turns Ratio (TTR)
Confirms correct winding ratios and detects shorted turns or winding faults.
3) Short Circuit Impedance Testing
Verifies transformer impedance and identifies mechanical displacement within windings.
4) Winding DC Resistance – Primary & Secondary
Detects loose connections, high resistance joints, and winding integrity issues.
5) Exciting Current Testing
Identifies core defects and abnormal magnetic conditions.
6) Windings Tan Delta Testing
Assesses insulation quality and dielectric losses.
7) Bushing Tan Delta Testing
Ensures high-voltage bushings are operating within safe parameters.
8) SFRA (Sweep Frequency Response Analysis)
Advanced diagnostic testing to detect:
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Winding movement
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Core displacement
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Transport damage
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Mechanical deformation
SFRA is one of the most powerful transformer diagnostic tools available today.
Protection Relay Testing – Omicron CMC356
In addition to transformer testing, we perform comprehensive Protection Relay Testing using the Omicron CMC356 test system.
We offer:
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Primary Injection Testing
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Secondary Injection Testing
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Relay calibration and verification
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Functional trip testing
This ensures your protection systems operate correctly during fault conditions — protecting your transformer investment.
Transformer Testing in Gqeberha (Port Elizabeth)
Our Eastern Cape operations are based in:
📍 North End, Gqeberha (Port Elizabeth)
We provide on-site transformer field services throughout the Eastern Cape and across South Africa.
Why Choose Transformer Field Services?
✔ Industry-leading Omicron test equipment
✔ Highly trained transformer specialists
✔ Accurate diagnostic reporting
✔ Fast turnaround times
✔ Division of Free State Transformers
✔ Nationwide field service capability
Book Professional Transformer Testing Today
If you require transformer testing, protection relay testing, or complete transformer field services in South Africa, contact:
🌐 www.transformerfieldservices.co.za
Protect your transformer assets with professional diagnostic testing from Transformer Field Services.