NAVAT Automatic Intelligent CT PT Calibration Tester
Product introduction
It is a new automated testing equipment, it uses advanced electronic technology, the transformer is taken directly polar decomposition of the error signal, and after appropriate after the operation, the transformer points, phase error , quadrature error in the digital display. NAVAT transformer calibrator is simple, intuitive readings, measure quickly, can reduce energy consumption, reduce labor intensity; small size, light weight, easy to carry and field testing; instrument can be fixed at 5% Operating current (voltage) under testing; some old users asked Nanao Electric Wuhan Co., Ltd. produce this new generator testers, which can detect S-class current transformer and the secondary voltage of the voltage transformer calibrator 100/3V, then 1% of the rated instrument can measure the current transformer operating current the error; instrument in the detection process can be easily carried from the school at any time to ensure the accuracy of the instrument; critical components using imported components, stable and reliable quality, widely used in metering, power supply and other departments and transformer manufacturers, is to carry out transformer testing the ideal instrument.
Also called name
Transformer tester, PT calibrator, CT calibrator,NAVAT Automatic Intelligent CT PT Calibration Tester
The Characteristics of the products
1. Use 320x240 dot-matrix LCD, with wide station visual zone and long life back lighting, easy to use.
2. With beautiful appearance.
3. Percentage, ratio, phase-angle difference displayed in big characters, convenient for customers to test.
4. Meets JJG314-1993 and JJG314-1994,automatically sample.
5. Automatically detect the polarity and ratio error.
6. The soft ware of the upper-computer with the function of virtual instrument.
7. Solve the problem of S degree measurement.
8. Automatically change the measurement distance.
9. Use advanced, special circuit and DSP technique, solve the problem of instability of resistor-condenser & phase-shifted Circuit
10. Power consumption: < 15VA(without micro printer)
                       < 25VA(with micro printer)
11. Harmonic Reduction:> 40db
12. Dimension:260mm×350mm×150mm
13. Weight:6kg
The parameters of the products 
1. service condition
   (1) temperature:5℃--40℃   humidity:<80%(25℃)  
       altitude:<2500m
       power frequency:50Hz±0.5 Hz    supply voltage:220V±5V
   (2) measurement range:
       co-phase component (%): 0.0001～200.0                  
       resolution: 0.0001
       orthogonal component: 0.001~700.0         resolution: 0.001
       resistance(Ω): 0.0001~20.0               resolution: 0.0001
       admittance (ms): 0.0001~20.0              resolution: 0.0001
   (3) intrinsic error:
       co-phase component:   ΔX=±(X×2%＋Y×2%)± Dx (1degree optional)
       orthogonal component: ΔY=±(X×2%＋Y×2%)± Dy (1degree optional)
                            “X”,“Y”——display of the device
                            “Dx , Dy”—— the quantization error of the device
                             Dx=2,Dy=5
   (4) dial indicator:      2 degree (1degree optional)
2. working range:
  (1) current:(1%－149%)In    (In =5A)
              (5%－149%)In    (In =1A)
  (2) voltage:(5%－149%)Un    (Un =100V，150V，100V/ )
              (5%－149%)Un    (Un =100V/3)
3. working load:  
  (1) current:TO-TX＜0.12Ω       cosΦ=1
  (2) voltage:a-x＜0.25VA        (100V)
4. polarity error indication
There should be polarity error indication when the working current (voltage) exceeds 5% of the rated current (voltage) , or the error more than 180%.
Note: if there was not indication when the working current (voltage) is more than 10% of the rated current (voltage), please stop increasing the current (voltage ), to avoid burn the device.
5. ratio error indication:
There should be ratio error indication when the working current (voltage) exceeds 5% of the rated current (voltage) , or the error more than 30% but less than 180%.
6. explanation for insulation and withstand tests:  terminal TX connects to ( )terminal
 the outlet can bear the shell 1.5kV, 1.5min withstand voltage.
7, transformer calibrator main features:
⑴ use 320 x 240 dot matrix LCD, visible range, with a long-life back light, easy to use;
⑵ English user interface, attractive interface;
⑶ dial indicator, ratio difference, angle difference using large font display, user observation;
⑷ fully meet JJG314-1993 and JJG314-1994 requirements, automatic sampling;
⑸ automatically determine the polarity of the error, ratio error;
⑹ PC software with virtual instruments open function;
⑺ completely solve the S-class measurement problems;
⑻ auto ranging;
⑼ unique circuitry and advanced DSP technology combine to completely remove the RC phase shifter circuit instability.
⑽ power consumption: <15VA (without micro-printer)
<25VA (with micro-printer)
⑾ harmonic rejection ratio:> 40db
⑿ Dimensions: 260mm (length) × 350mm (W) × 150mm (height)
⒀ Weight: 6kG