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Contact SupplierIf you’re in the business of maintaining power transformers, substation equipment, or oil-filled electrical assets, dielectric insulation testing is non-negotiable. Myriad Industrial Solutions LLP presents the FLD T Transformer Oil Tan Delta Tester – a state-of-the-art, fully automatic instrument designed for precise measurement of dielectric dissipation factor (tan δ), relative permittivity (ε), and insulation resistivity in transformer oils and other dielectric fluids.
What is Tan Delta in Transformer Oil?
Tan Delta (tan δ), also known as the dielectric dissipation factor, is a critical parameter that reflects the insulating quality of transformer oil. It quantifies the losses occurring due to the presence of moisture, sludge, aging byproducts, and other contaminants.
A low tan delta value indicates high insulation quality. Conversely, a high value signals that the oil has deteriorated and could fail under high voltage stress.
FLD T Transformer Oil Tan Delta Tester: Key Features
Feature | Specification |
Tan Delta Measurement Range | 0.00001 – 4 |
Resolution | 1×10⁻⁶ |
Dielectric Constant Range (ε) | 1.0 – 25.0 |
Resistivity Measurement Range | 2.5 MΩ·m – 100 TΩ·m |
Voltage Range | 500 – 2000 V RMS |
Frequency Range | 45 – 65 Hz |
Temperature Range | 20°C – 110°C |
Accuracy (Tan Delta) | ±1% + 0.00008 |
Oil Volume Required | 45 cm³ |
Weight | < 6 kg |


