According to national electricity department, transformer shall be done pre-qualification test including turns ratio or voltage ratio test. The TTR transformer turns ratio tester is designed for the turns ratio test, group test, phase angle test for transformers and CTs.
Features
With lithium battery, one charge can keep 6 hour use. Battery can be replaced anytime for continuous operation.
Reverse-potential protection function;
Controlled by microcomputer, automatically do self-calibration, data processing;.
7 inch display; clear unders sunshine;
Thermo sensitive printer, easy to print onsite;
Clock and date display not affected by electricity failure. With U disk and tester storage function. With RS232 and USB port.
Test range: upto 10000;
Ζ connection transformer test;
Blind test function, group test, vector diagram display, phase angle 0-360 º resolution: 0.01 º;
HV LV reverse protection function; short-circuit protection function;
Technical specification:
Measure range: 0.9～10000; resolution: minimum 0.0001; 
phase angle 0-360 º resolution: 0.01 º
Accuracy:  0.2 class; Output voltage:  24V
Dimension: 300mm×175mm×80mm; Weight:  2kg