The Midel 7131 transformer oil universal tester TOR-7, made by GlobeCore, is designed to check the main quality indicators of insulating fluid used in transformers, reactors and other high-voltage equipment. Midel 7131 is a synthetic bio-oil that’s really stable at high temperatures and is safe for the environment. But, as with any dielectric fluid, it needs to be checked regularly. TOR-7 lets you quickly measure things like electrical strength, moisture content, dielectric loss tangent, relative permittivity, and other characteristics. Testing lets you spot oil degradation, contaminants, or changes in its structure that could affect how your equipment works. It’s got an automated measurement system, touch control panel and digital display for easy reading of results. You can then store or transfer the data for further analysis. It’s small and simple, so you can use it in the lab or out on site. The TOR-7 helps to keep equipment stable, prevent accidents and make the transformer last longer by accurately monitoring the condition of Midel 7131 transformer oil.
Midel 7131 transformer oil universal tester TOR-7 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 | |