Obsnap Instruments Sdn Bhd
29A, Jalan SS 15/4C, 47500 Subang Jaya, Selangor, Malaysia.
+603-5621 5786
+603-5621 5829
+60122185651 (Enquiry)
+60162233687 (Vacancy)

Transformer Turns Ratio Meter Prova 1660

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Transformer Turns Ratio Meter Prova 1660 Harmonic Clamp Meter Electrical Inspection

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Product Features
  • Measurements of 1Φand 3ΦTransformer/VT/CT Turns Ratio.
  • VT/PT ratio 0.8~10000, CT ratio 0.8~2000.
  • Graphical and Literal Illustration of Measurements and Connections with Large Back-lighted Dot Matrix 240 x 128 LCD. Display Test Data with Nameplate Transformer Values for Easy Interpretation.
  • Ten Test Frequencies (50~400Hz).
  • Display Turns Ratio, Deviation, Secondary Output, Excitation Voltage and Current, Phase Angle and Nameplate Transformer/VT/CT Values in one page for easy transformer quality interpretation.
  • Check for Live Test Points, Short Circuit, Open Circuit, and Reverse Polarity before Each Measurement. Message is displayed to Warn Users (But, checking is not performed once measurement starts).
  • Store 4096 Files of Transformer Nameplate Values (VT/PT/CT, 1Φ/3Φ, Test Frequency, Primary and Secondary Voltages or Ratio, RCF) and Measuring Data.
  • 9 types of 3Φ Windings Connections pre-installed for easy user selection.
  • Wireless Blue Tooth Communication with PC.
  • Select Filter to Remove Field Noise (Slow, Normal, Fast).
  • Disable or Enable Auto-Power-Off with Programmable Time.
  • Built-in calendar clock.
    Records with Date and Time Stamp.
  • Powerful Lithium Battery (3400mAH) with built-in Charging Circuit.
  • User Programmable RCF (Reference Correction Factor, 0.99~1.01) to Correct Accuracy within 1% Error.
  • Friendly File System for Easy On-site Data Retrieval and Nameplate Values Management.
  • PC Application Software included.

Electrical Specifications:  
Reference Conditions23± 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) Autoranging0.8000 to 100001
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) Autoranging0.8000 to 2000.0
Accuracy (70Hz) Ratio Range Accuracy (% of Reading)
0.8000 to 2000.0 ± 0.5%
Excitation Signal VT/PT Mode34Vrms max                 
       CT ModeAuto Level 0 to1A, 0.1 to 20Vrms
Excitation Current     
                       Range0 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 ~ 50, 85% RH
Storage Environment -20 ~ 60, 75% RH
1. Test leads (set of 2) 
2. Alligator clips (4pcs.) 
3. Rechargeable lithium battery 
4. User manual 
5. AC adaptor 
6. Power cord 
7. Software CD & Manual
8. Carrying bag
Please leave your enquiry here, we will reply as soon as possible.
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