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Megger TTRU1 Handheld Transformer Turns Ratiometer
Introduction of Megger TTRU1
Megger's newest portable transformer turns ratiometer is called the TTRU1. With just one connection, the Megger TTRU1 can detect leakage reactance, or short-circuit impedance, in addition to typical polarity validation and turns ratio testing. Color-coded leads, clamps, and movable on-screen vectors that match the transformer nameplate are used in this simple setup to ensure precise results the first time.
The TTRU1's user-friendly design guarantees ease of use. It has customizable on-screen vector diagrams and color-coded leads and clamps. These schematics, which lead technicians through the setup procedure, are customized to match the particular transformer nameplate under test. This rigorous design thought helps eliminate typical errors, delivering correct results on the first attempt.
Megger TTRU1 Key Features
- Auto screen dimming and power off
- Instrument self-check
- Belt loop carry bag
- Microsoft® Excel® export
- Customisable tranformer vector list and voltages
- Guided three-phase tranformer tests
- PowerDB import
- Phase deviation
Megger TTRU1 Specifications
| FEATURE | SPECIFICATION |
|---|---|
| Input power | 6 x IEC LR6 1.5 V alkaline (AA) |
| 6 x IEC HR6 1.2 V NiMH rechargeable (AA) | |
| Battery life | 1000 TTR tests on a single charge |
| Storage: 1+ years NiMH, 5+ years alkaline | |
| Battery charging | USB-C when set to NiMH batteries |
| Protection against alkaline charging | |
| PowerEx PRO NiMH battery charging | 0 to 45 °C |
| Output | Voltage: Single phase, 1-50 V |
| Current: 0.1 mA – 1 A | |
| Frequency range: 40 – 480 Hz | |
| Regulatory | Safety: IEC 61010-1:2010 + AMD1:2016 |
| EMI/EMC: IEC 61326-1:2012 | |
| RoHS2: EN50581 | |
| Vibe/Shock: MIL-STD-810G | |
| Ingress: IP54 | |
| Transformer testing standards | IEEE C57.152-2013 |
| IEC 60076-1:2011 | |
| AS/NZS 6076 1:2014 | |
| CIGRE 445 2011 | |
| GOST 3484.1-88 | |
| Dimensions | 22.8 x 10.5 x 7.5 cm / 8.98 x 4.1 x 2.95 in |
| Weight | 1 kg / 2.2 lbs |
| Case | Heavy duty over-molded case with built-in connection for hook strap |
| Carry case with quick start guide, belt loop hook, and pouches for included lead set and accessories | |
| Internal/external data storage | Up to 10 custom vector storage |
| Up to 10,000 sets of single phase results internal storage | |
| Transferable via USB 2.0 drive | |
| USB-C connection to PC (EXP ONLY) | |
| Communication/control software | USB Interface for PC download with custom GUI |
| Display | Full colour 88 mm (3.5 in) 320 x 240 px Hi-bright LCD screen with ‘auto dim’ and ‘auto off’ to preserve battery life |
| Printer (optional) | 51 mm (2 in) thermal printer |
| Prints all measurement data displayed on GUI | |
| Environmental | Operating: -20 ° to 50 °C (-4 ° to +122 °F) |
| Storage: -30 ° to 70 °C (-22 ° to +158 °F) | |
| Relative humidity: 0-90 %, non-condensing | |
| TTR | Turns ratio measurement methods: Single phase step up, Single phase step down |
| Turns ratio range and accuracy | Step down excitation: |
| 25-50 V: ±0.05 % (0.8 – 1000), ±0.10 % (1001 – 2000), ±0.30 % (2001 – 15000), ±1.0 % (15000 +) | |
| 1-24 V: ±0.10 % (0.8 – 1000), ±0.20 % (1001 – 2000), ±0.60 % (2001 – 15000), ±2.0 % (15000 +) | |
| Step up measurement: | |
| 25-250 V: ±0.05 % (0.8 – 200, most Power Tx) | |
| 1-24 V: ±0.10 % (0.8 – 200) | |
| Excitation current resolution | Resolution: 0.1 mA (0.1 mA – 100 mA), 1.0 mA (101 mA – 1000 mA) |
| Excitation current accuracy | ±1 % Reading, ±0.1 mA |
| Frequency accuracy | ±1 % Reading, ±0.1 Hz |
| Phase range | 0 – 360 ° |
| Phase accuracy | ±0.05 ° |
| Max voltage output | 45 V AC peak |
| SCI | Impedance measurement methods: Single phase |
| Impedance measurement range | 0.1 Ω – 700 Ω |
| Impedance accuracy | ±1 % reading, ±0.01 %; ±1 % reading, ±0.10 mΩ |
| Reactance measurement range | 0.1 Ω – 700 Ω |
| Reactance accuracy | ±1 % reading, ±0.01 %; ±1 % reading, ±0.10 mΩ |
| Inductance accuracy | ±1 % reading, ±10 µH |
| Power factor range | 0.1 % – 100 % |
| Power factor accuracy | ±5 % reading, ±0.1 % |
| AC current accuracy | ±0.2 % reading, ±0.1 mA |