Dielectric strength tests up to 90 kV to IEC 60156, with automatic statistics
OT-90
Insulating oil testing
OT-90
Oil breakdown voltage test set
| C/ María Barbeito, 14 | Contact Contact T [+34] 982 20 99 20 |
|---|---|
| 27003, Lugo, Spain | T [+34] 982 20 99 20 info@amperis.com | www.amperis.com |
Breakdown voltage testing of mineral and synthetic insulating oils, in the laboratory and in the field.
Dielectric strength under control
The OT-90 measures the breakdown voltage of insulating liquids in accordance with IEC 60156, with test voltages of 10 to 90 kV on the electrodes. It serves the laboratories of companies that manufacture, operate or service transformers, oil circuit breakers, instrument transformers and capacitors, and handles mineral and synthetic oils with the same standardised procedure.
A fully programmable test cycle
The operator sets the test voltage value, the voltage rise rate, the test time and the mixing time of the sample. The set raises the voltage at 2 kV/s, measures it with a 3% accuracy, disconnects at the instant of breakdown and repeats the sequence, delivering the mean of the measurements and the standard deviation without any manual calculation. The mushroom-profile electrodes with a 25 mm radius follow the guidelines of the standard.
Main features
- Test voltage from 10 to 90 kV; rise rate of 2 kV/s.
- Testing to IEC 60156 of mineral and synthetic oils.
- Safety interlock: no voltage can be applied with the cover open.
- Ergonomic design for the correct execution of the procedure.
- Internal battery for up to 8 hours of autonomous operation.
- Bluetooth link and built-in thermal printer.
Software and reporting
Remote control from a computer
Over the Bluetooth link, the OT-90 is operated from a computer with the remote-control software: tests are started and supervised from the desk, the results of each sample are stored and the reports are printed, so the laboratory archive is built without transcribing tickets by hand.
Documented results in the field
The built-in thermal printer issues the test ticket on the spot, and the internal battery keeps the set running for up to 8 hours, which allows complete, documented test sessions at installations without a mains supply.
Statistics calculated by the set
At the end of the sequence the instrument computes the mean value of the measurements and the standard deviation, the two figures with which IEC 60156 characterises the dielectric strength of the sample.
OT-90 — MEASUREMENT DATA
| Test voltage on the electrodes | 10 to 90 kV |
|---|---|
| Voltage rise rate | 2 kV/s |
| Voltage measurement accuracy | 3% |
| Test standard | IEC 60156 |
| Test electrodes | Mushroom profile, 25 mm radius, per the standard |
| Programmable parameters | Test voltage value, voltage rise rate, test time, mixing time |
| Result processing | Automatic mean of the measurements and standard deviation |
| Oils under test | Mineral and synthetic |
OT-90 — TECHNICAL SPECIFICATIONS
| Power supply | 230 V (50±2 Hz) |
|---|---|
| Internal battery | Up to 8 h of autonomous operation |
| Power consumption | 0.5 kW |
| Communication | Bluetooth connector for the computer link |
| Documentation | Built-in thermal printer; PC software with result storage and reports |
| Safety | Interlock preventing power connection with the cover open |
| Operating temperature | 0 to +35 °C |
| Relative humidity | Below 80% |
| Dimensions | 520 × 335 × 320 mm |
| Weight | 35 kg |