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Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Tester: 10,000:1 or 20,000:1 Range
The Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Testers are automatic, battery-operated, lightweight transformer turns ratio test sets that support simple, single-button, one-handed operation. They are designed for measuring the turns ratio, excitation current, and polarity of windings in single- and three-phase distribution and power transformers (tested phase by phase), potential and current transformers, and tapped transformers.
Measurement
Both models measure turns ratio to an accuracy of ±0.2% (0.8 to 4000). However, the Megger TTR20-1 differs from the Megger TTR25-1 in regards to its range:
- TTR20-1 turns ratio range: 10 000:1
- TTR25-1 turns ratio range: 20 000:1
Additionally, the Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Testers can record ratio and phase errors for brushing CTs to an accuracy of ±0.2% nameplate, reducing the need for heavy test equipment and decreasing the test time. They are ideal for determining the no-load accuracy of most CTs and PTs and can be used to identify potentially faulty CTs and PTs, making them perfect for conducting inspections in meter shops.
Ergonomic Design
Measurements are displayed on the easy-to-read, high-contrast, backlit LCD. Housed in an extra-rugged, high-impact, shock-resistant case with metal connectors, these lightweight (870g) turns ratio test sets are compact ensuring they support single-handed operation which significantly reduces test time and eliminates the need to kneel or bend down to operate the instrument. Finally, the Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Testers are powered by six easily replaceable AA alkaline batteries that deliver twelve hours of operating time.
Ready to use straight out of the box, the Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Testers are ideal for use in substations, transformer-manufacturing factories, and meter shops.
Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Tester Key Features
- Automatic, battery-operated, lightweight transformer turns ratio test sets
- Support single-hand, one-button operation
- Measure the turns ratio, excitation current and polarity of windings in single- and three-phase distribution and power transformers (tested phase by phase), potential and current transformers, and tapped transformers
- Turns ratio accuracy: ±2% (0.8 to 4000)
- TTR20-1 turns ratio range: 10 000:1
- TTR25-1 turns ratio range: 20 000:1
- Records ratio and phase errors for brushing CTs to an accuracy of ±2% nameplate
- Determine the no-load accuracy of most CTs and PTs
- Identify potentially faulty CTs and PTs
- Easy-to-read, high-contrast, backlit LCD
- Extra-rugged, high-impact, shock-resistant case with metal connectors
- Lightweight (870g)
- Powered by six AA alkaline batteries
- Operating time: 12 hours
- Ideal for use in substations, transformer-manufacturing factories, and meter shops
What’s Included?
- Your Choice of Megger TTR20-1 OR TTR25-1 Handheld Transformer Turns Ratio Tester
- Combined Test Leads (1.8m/6ft and X/H Winding)
- Instruction Manual
- Electronic Documents (TTR25-1 ONLY)
Megger TTR20-1 & TTR25-1 Handheld Transformer Turns Ratio Tester Technical Specifications
| TTR20-1 | TTR25-1 | |
| Type of Power | Six standard “AA” (IEC LR-6) alkaline batteries | |
| Battery Life | Up to 12 hours of field operation | |
| Excitation Voltage | 8 V rms for testing distribution or power transformers and PTs; 0.5, 1.5, or 8 V ac rms for testing CTs |
|
| Test Frequency | 55 Hz internally generated providing a universal 50/60 Hz test set |
|
| Excitation Current Range | 0 to 100 mA, 4-digit resolution | |
| Turns Ratio Range | 0.8 to 10,000, 5 digit resolution | 0.8 to 20,000, 5 digit resolution |
| Transformer Polarity | Normal or reversed | |
| Current (rms) Accuracy | ±5% rdg ±0.5 mA | |
| Turns Ratio Accuracy* | ±0.20% (0.8 to 4,000) | 0.20% (0.8 to 4,000) |
| ±0.25% (4,001 to 10,000) | 0.25% (4,001 to 10,000) | |
| - | 0.30% (10,001 to 20,000) | |
| *For Excitation Current Values no greater than preset value. | ||
| Display Full Graphics | LCD module, adjustable back-lighting, wide temperature range, 128 x 64 dots (21 characters by 8 lines) |
|
| Safety/EMC/Vibration | Meets the requirements of IEC-1010-1, CE and ASTM D999.75 | |
| Temperature Range | Operating: -20º C to 55º C (-5º F to 130º F) | |
| Storage: -50º C to 60º C (-55º F to 140º F) | ||
| Relative Humidity | Operating: 0 to 90% non-condensing | |
| Storage: 0 to 95% non-condensing | ||
| Protective Devices | High voltage side shorting relay, transient voltage suppressors and gas surge voltage protectors |
|
| Measuring Time | Less than 5 seconds | |
| Measurement Method | ANSI/IEEE C57.12.90 and IEC 600076.1 (2000) | |
| Dimensions | 240 H x 115 W x 50 D mm (9.5 H x 4.5 W x 1.9 D in.) | |
| Weight | Approximately 1.3 kg (2.8 lb), including leads | |
Reviews
Additional Information
| SKU | TTR20-1/TTR25-1 |
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