tender for procurement of automatic three phase transformer turns ratio meter ttr under testing department, sgtpp, wbpdcl. , procurement of automatic three phase transformer turns ratio meter ttr under testing department, sgtpp, wbpdcl. , turn ratio meter for 3 ph transformer ( additional description: automatic single as well as three phase transformer turns ratio meter with manual selectable test voltage up to 250v or automatic. turn ratio measuring range: 0.8 to 20000 & accuracy ±0.25% or better excitation current measurement range:0 to 2a (max.) & accuracy: ±1ma or better. phase angle measurement:0 to 360 degrees/±180 degree & accuracy: ±0.05 degree or better. with all standard accessories. ) *** technical specification as per attached annexure. *** guaranteed technical particulars (gtp) , as per attached annexure.