Description
The PROVA 1660 Transformer Turns Ratio Meter is a high-precision instrument for transformer, VT, and CT turns ratio measurements, supporting both single and three-phase configurations. It measures CT ratios up to 0.82000 and VT/PT ratios up to 0.810000, providing accurate readings for transformer quality assessment.
The device features a 5” large dot-matrix LCD (240 × 128) with backlight, displaying graphical and numeric information for easy interpretation. Users can view turns ratio, deviation, secondary output, excitation voltage and current, phase angle, and nameplate transformer values all on a single screen. Measurement is compatible with 10 test frequencies from 50–400 Hz and adheres to ANSI/IEEE C57.12.90 and IEC 60076-1 standards.
The PROVA 1660 ensures safety and accuracy by checking for live test points, short circuits, open circuits, and reverse polarity, with warning messages provided before measurement begins. It supports Bluetooth wireless communication, stores up to 4096 files, and includes programmable Reference Correction Factor (RCF 0.99–1.01) to maintain accuracy within 1%.
Compact and portable, it is powered by a rechargeable 3400 mAh lithium battery, providing over 10 hours of continuous operation. Auto power-off is programmable, and all measurements are date- and time-stamped for easy tracking.
Specifications
Electrical Specifications:
Reference Conditions：23℃± 5℃ (30 to 50% RH) range.
Add 25ppm/℃ for 0° to 18℃ and 28° to 50℃ to all accuracy specifications.
No external electrical or magnetic fields.
Output current ≦150 mA for VT/PT and ≦50mA for CT. Calibration cycle is 1 year.
| Ratio Range (VT/PT) |
Autoranging：0.8000 to 10000：1 |
| Accuracy (70Hz) |
Ratio Range |
Accuracy (% of Reading) |
| 0.8000 ~ 999.99 |
± 0.1% |
| 1000.0 ~ 4999.9 |
± 0.2% |
| 5000.0 ~ 10000 |
± 0.25% |
| Ratio Range (CT) |
Autoranging：0.8000 to 2000.0 |
| Accuracy (70Hz) |
Ratio Range |
Accuracy (% of Reading) |
| 0.8000 to 2000.0 |
± 0.5% |
| Excitation Signal |
VT/PT Mode：34Vrms max
CT Mode：Auto Level 0 to1A, 0.1 to 20Vrms |
| Excitation Current
Display |
Range：0 to 1000mA
Accuracy：±(2% of Reading +2mA) |
| Excitation Frequency (Hz) |
50, 55, 60, 70, 100, 120, 200, 240, 300, 400 |
| Display |
5” Large dot matrix LCD display (240*128) with backlight |
| Power Source |
Rechargeable Lithium Battery, 3400mAh |
| Battery Life |
Over 10 hrs of continuous operation. Battery life (%) indication |
| Battery Charger |
Universal input (90 to 264Vrms input) |
| Charging Time |
＜4 hrs |
| Data Storage |
4096 Files Each (VTM, CTM, VTR, CTR, BMP) |
| Date/ Time |
Battery-backed, Real-time Calendar clock |
| Measurement Method |
ANSI / IEEE C57.12.90 and IEC 600076.1 |
| Operation Environment |
5°C ~ 50°C, 85% RH |
| Storage Environment |
-20°C ~ 60°C, 75% RH |
Accessories:
- Test leads (set of 2)
- Alligator clips (4pcs.)
- Rechargeable lithium battery
- User manual
- AC adaptor
- Power cord
- Software CD & Manual
- Carrying bag
