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The TOR-3 unit is designed for determining dielectric loss tangent and permittivity of transformer oils and other dielectric fluids according to the IEC 60247.
It is a fully automatic device that allows testing according to the procedures defined in these standards, as well as according to the user procedures specified in the appropriate section of the setup menu.
Watch the TOR-3 video here.
Operating principle
The principle of operation is based on measuring the difference in amplitudes and phases of signals obtained when a test sinusoidal voltage with an effective value of up to 2 kV is applied simultaneously to the reference capacitor and the object of measurement, which is the measuring cell of the unit.
The difference between the amplitudes of the signals taken from the reference capacitor and the internal electrode of the measuring cell is proportional to the dielectric constant of the liquid under study. The phase difference between the signals taken from the reference capacitor and the internal electrode of the measuring cell characterizes the value of the dielectric loss tangent.
GlobeCore TOR-3 Tan Delta Tester for Transformer Oil and Dielectric Fluids
Operating AC voltage, V
85 – 264
Power frequency, Hz
48 – 63
Power requirement, VA
Below 250
Applied measuring voltage АС, kV
Sinusoidal, 500 – 2000 V actual
Tan δ measurement range
0,00001 – 1
Tan δ measurement resolution
1х10-5
Tan δ measurement accuracy
+/- 1% of measurement + 0,00008
Measurement range of relative dielectric constant ε
1,0 – 15,0
Accuracy of ε measurement
+/- 1%
Electrical capacitance C measurement range, pF
20 – 1000
Accuracy of С measurement, pF
+/- 1% + 1
Oil temperature measurement range, ᴼС (oF)
20 – 110 (68 – 230)
Measuring cell volume, cm³ (in³)
42 (2,6)
Electric capacity of an empty cell, pF
65 – 85
One measurement duration, minutes, not more than
5
AC frequency setting range, Hz
45 – 65
Temperature measurement resolution, oС (oF)
0,5 (33)
Inbuilt printer
None
Process temperature, oС (oF)
0 – 50 (32 – 122)
Storage temperature, oС (oF)
– 20 (- 4) to +60 (+140)
Relative humidity, %
Up to 90 without condensation
Dimensions, mm (in)
400 (16) Х 450 (18) Х 300 (12)*
Weight, kg (lbs), not more than
5,3 (12)*