The TOR-7 transformer oil tester is designed to determine the volumetric gas content, moisture, contamination by solid particles, and hydrogen content in oil. The device can analyze mineral transformer oils with specific characteristics:
- kinematic viscosity at 50 °C – 2…12 mm2/s;
- density at 20°C – 800…950 kg/m3;
- mass moisture content in oil – not more than 10 ppm;
- industrial purity class according to ISO 4406 – not worse 21/19/16.
Operating Principle
Measurements are based on tracking the pressure change of gas within a vacuumed cylinder during the pouring of an oil portion. Considering the volumes of the cylinder and the poured oil, as well as the pressure inside the cylinder before and after pouring, one can determine the volumetric gas content. With the help of sensors and a control board, the moisture content, oil temperature, hydrogen content, and the number of solid particles in the oil are calculated and displayed on the screen.
General technical specifications
| № |
Item
|
Value
|
| 1 |
Measuring cell volume, l |
1,2
|
| 2 |
Oil sample volume, l |
0,5 – 0,7 |
| 3 |
Maximum pressure in the device, Pa |
0,3
|
| 4 |
Maximum leakage in the device, Pa |
26
|
| 5 |
Inlet oil pressure, bar |
0,3 – 3
|
| 6 |
Temperature of measured oil, ºС |
20 – 90
|
| 7 |
Maximum power consumption, kW, no more |
1
|
| 8 |
Electrical current parameters: – voltage, V – variable with frequency, Hz |
Customer request
|
| 9 |
Overall dimensions, mm, not more than – length – height – width |
465
530
375
|
| 10 |
Weight, kg, not more than |
40
|
Oil measurement characteristics
| № |
Item |
Value |
|
| Moisture measurement characteristics |
| 1 |
Operating range, aw (water activity (aw)) |
0…1 |
|
| 2 |
Accuracy at 20 °C |
±0.02 aw (0…0.9 aw) ±0.03 aw (0.9…1 aw) |
|
| 3 |
Temperature measurement |
yes |
|
| 4 |
Working environment temperature, °C |
0…55 |
|
| Hydrogen measurement characteristics |
| 6 |
Measuring range, ppm |
25-5000 |
|
| 7 |
Accuracy |
20% of measurement or 25 ppm |
|
| 8 |
Repeatability |
10% of measurement or 15 ppm |
|
| 9 |
Response time |
<60 min (90% step change) |
|
| 10 |
Cross Sensitivity |
Less than 2% cross-sensitivity to other gases (CO, CO2, Hydrocarbons) |
|
| 11 |
Working environment temperature, °C |
0…55 |
|
| Contamination Measurement Characteristics |
| 6 |
Measuring range, ppm |
25-5000 |
|
| 7 |
Accuracy |
20% of measurement or 25 ppm |
|
| 8 |
Repeatability |
10% of measurement or 15 ppm |
|
| 9 |
Response time |
<60 min (90% step change) |
|
| 10 |
Cross Sensitivity: |
Less than 2% cross-sensitivity to other gases (CO, CO2, Hydrocarbons) |
|
| 11 |
Working environment temperature, °C |
0…55 |
|
| Characteristics of degree of purity or level of contamination |
| 12 |
Acceptable viscosity range |
1 to 1000 mm²/s |
|
| 13 |
Measured variables |
ISO 99 (ISO 4406:1999)
SAE (SAE AS 4059) or
ISO 87 (ISO4406:1987)
NAS (NAS 1638)
|
|
| 14 |
Measurement range |
Measurement from ISO class 9/8/7 (MIN) to ISO class 25/24/23 (MAX)
Calibrated to ISO range from 11/13/10 to 23/21/18
|
|
| 15 |
Accuracy |
+/- ½ ISO class in calibrated range |
|
| 16 |
Working environment temperature, °C |
0 … +85 |
|
- measurement of four crucial parameters of transformer oil (moisture, hydrogen, contamination by solid particles, gas content) in a single device;
- an integrated printer is available, measurement results can be printed out;
- reliable performance;
- сonvenient and durable housing.
TOR-7 can be used for:
- measuring the parameters of mineral transformer oil;
- measuring the parameters of silicone transformer oil;
- measuring the parameters of Midel 7131 transformer oil;
- measuring the parameters of FR3 dielectric fluid.
