Winding Resistance Tester
DC winding resistance measurement reveals turn-to-turn short circuits, loose or corroded tap-changer contacts, broken conductor strands, and high-resistance joints. Green Watt's winding resistance tester delivers fast, accurate measurement with automatic demagnetisation, minimising test time on large power transformer windings.
Key Features
- High test current: multiple ranges (1 A, 10 A, 100 A) for all winding types
- Wide resistance range: micro-ohms (µΩ) to kilo-ohms (kΩ) in a single instrument
- Simultaneous three-phase measurement greatly accelerates testing
- Automatic demagnetisation — protects transformer on re-energisation
- Tap-changer testing: continuous resistance monitoring during OLTC operation
- Temperature correction to 75°C or 20°C reference
- Colour touchscreen with real-time resistance curve display
- Internal memory with USB download and report generation
Applications
- ›Commissioning and maintenance of power and distribution transformers
- ›On-load tap changer (OLTC) dynamic resistance testing
- ›Motor and generator winding resistance measurement
- ›Reactor and inductor winding resistance verification
- ›Post-repair verification of rewound transformers
Technical Specifications
| Test Current Ranges | 1 A, 10 A, 100 A |
| Measurement Range | µΩ to kΩ |
| Standards | IEC 60076-1, IS 2026, IEEE C57.12.90 |
| Interface | Colour touchscreen, USB |
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