Tan Delta Tester
The Greenwatt Tan Delta Test Kit (GW-TD 12) is an automatic instrument for measuring the dissipation factor (tan δ), power factor and capacitance of high-voltage insulation. With an integrated variable high-voltage source up to 12 kV, on-screen guided connections and variable-frequency interference rejection, it assesses the condition of transformers, bushings, CTs, PTs, cables and rotating machines — on a single, portable platform.
Key Features
- Measures dissipation factor (tan δ), power factor and capacitance of HV insulation with high resolution
- Integrated variable high-voltage source up to 12 kV — no separate HV set or reference standard required
- GST / UST test modes with guard to isolate individual insulation sections for analysis
- Variable-frequency measurement rejects field interference for reliable results in live 220/400/765 kV yards
- On-screen guided connection diagrams for single- and three-phase objects (1P/3P with 1S, 2S and 3S schemes)
- Large colour touch screen with built-in thermal printer and USB / RS-232 for instant results and data storage
Applications
- ›Power and distribution transformers
- ›Transformer and OIP bushings
- ›Current and voltage transformers
- ›High-voltage cables
- ›Insulators and surge arresters
- ›Rotating-machine insulation
Technical Specifications
| HV Source | Integrated variable, up to 12 kV |
| Measurements | Tan δ (dissipation factor), power factor (%), capacitance |
| Test Modes | GST, UST and GST-Guard |
| Interference Rejection | Variable-frequency measurement |
| Output & Connectivity | Colour touch screen, built-in printer, USB / RS-232 |
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