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NRZBJ Turns Ratio Tester Calibrator

NRZBJ Turns Ratio Tester Calibrator (also known as Turns Ratio Tester Calibration Device), it is used to calibrate the transformation ratio accuracy, resolution and group (including Z-type group) of transformer turns ratio tester with accuracy of 0.05 and below. This device is divided into two parts: standard three-phase PT and seven-plate inductive voltage divider. The standard three-phase PT is used to verify the group test function of the transformer turns ratio tester, including the Z-shaped group, and there are three voltage ratio options at the same time; the seven-plate inductive voltage divider is used to verify the transformation ratio accuracy and resolution of the transformation turns ratio tester, can also be used as an inductive voltage divider alone.

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Online Inquiry
  • Hotline: 086-27-87507966
  • QQ：2318207595
  • Technical Hotline: 086-27-87179600
  • Fax: 086-27-87507966
  • After Service: 086-27-87179600
  • Email: whnanrui@126.com

  • Product Introduction

  • Technical Parameters

  • After Service

NRZBJ Turns Ratio Tester Calibrator (also known as Turns Ratio Tester Calibration Device) it is used to calibrate the transformation ratio accuracy resolution and group (including Z-type group) of transformer turns ratio tester with accuracy of 0.05 and below. This device is divided into two parts: standard three-phase PT and seven-plate inductive voltage divider. The standard three-phase PT is used to verify the group test function of the transformer turns ratio tester including the Z-shaped group and there are three voltage ratio options at the same time; the seven-plate inductive voltage divider is used to verify the transformation ratio accuracy and resolution of the transformation turns ratio tester can also be used as an inductive voltage divider alone.

Product Functions
(1) Transformation ratio test function
Use the inductive voltage divider to verify the transformation ratio of the turns ratio tester. The preset standard transformation ratio is the reciprocal of any value between 1.111111 and 0.0000001. For example to verify the ratio of 1 2 5 10 20 50 100 200 500 1000 2000 2500 the dial of the inductive voltage divider should be selected to 1.000000 0.5000000 0.2000000 0.1000000 0.0500000 0.0200000 0.0100000 0.0050000 0.0020000 0.0010000 0.00050000 0.00040000. When verifying the transformation ratio the rated voltage of UAX is 200V and the device can work within 20% to 100% of the rated voltage.
(2) Resolution test function
Test the resolution displayed by the transformation ratio tester the "turns ratio tester calibrator" can preset the transformation ratio to be the reciprocal of any value between 1.111111 and 0.0000001 to test the resolution of various turns ratio testers during the resolution test There is no requirement for error but when calibrating the resolution of the turns ratio tester the display value of the turns ratio tester should change significantly with the increase or decrease of the resolution. Under normal circumstances set the inductive voltage divider to between 0.1000000 and 0.0999900 (that is the transformation ratio is between 10.000 and 11.100) and the display value of the turns ratio tester should be obvious with the change in the number of inductive voltage dividers.
(3) Through test function
When the inductive voltage divider is set to 1.000000 it is straight through. This function is to directly connect the primary voltage UAB of the turns ratio tester to the secondary terminals (terminal a b) that is UAB=Uab which can perform 1/1 self-calibration of the turns ratio tester. For the turns ratio tester that does not allow straight-through the isolation winding of the inductive voltage divider can be used for 1/1 isolation test.
(4) Group type test function
The "Turns Ratio Tester Calibrator" forms 12 groups of standard three-phase PT according to the connection method of primary star secondary star or triangle and primary triangle secondary star or triangle. It can test all groups of transformer turns ratio tester. At the same time the transformation ratio tested in the group can be selected from 10 100 and 1000 The single-phase errors of standard three-phase PT during group test are all less than 0.05%.
(5) Z-shaped group test function
There are 10 groups in Z-type group (△ / Z or Y/Z). At this time the transformation ratio is 100 and the error of two secondary windings of each single phase of standard three-phase PT is less than 0.05%.
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