BREAKDOWN VOLTAGE TESTER TOR-100
TOR-100 tester is designed to determine the electrical breakdown voltage of transformer oil and other liquid dielectrics in accordance with IEC 60156, VDE 0370, ASTM D877, ASTM D1816, IRAM 2341.
This list of standards may be supplemented and modified both with customer preferences taken into consideration and as new versions of standards become available.
Principle of operation
The working core of the tester is a high-voltage transformer and electronic modules. The principle of operation of the device is to gradually increase the voltage on the secondary winding of a high-voltage transformer from zero to maximum value, or to a value at which there will occur a breakdown of a liquid dielectric poured into a measuring cell installed on the high-voltage contacts of the transformer and constituting a part of its output electrodes.
A voltage rise at the high-voltage contacts of the secondary winding of the transformer occurs due to a gradual increase in the voltage on the primary winding when sinusoidal voltage is applied thereto from a controlled master inverter.
No. | Parameter | Value |
| 1 | Operating AC voltage, V | 85 – 264 |
| 2 | Power frequency, Hz | 48 – 63 |
| 3 | Power requirement, VA | 70 max |
| 4 | Maximum output voltage, kV | Sinusoidal, up to 100 kV RMS |
| 5 | Measurement tolerance of output voltage | ±1 % |
| 6 | Voltage increase rate, kV/s | From 0.5 to 10 |
| 7 | Resolution of output voltage indication, V | 100 |
| 8 | High voltage shutoff time after breakdown, µs | 10 max, 4 typical |
| 9 | Measuring cell volume, cm³ | 500 |
| 10 | Ambient temperature measurement range, °С (°F) | -10 – 50 (14 – 212) |
| 11 | Resolution of temperature measurement, °С | 1 |
| 12 | Integrated printer | Yes |
| 13 | Operating temperature, °С (°F) | -10 – 50 (14 – 122) |
| 14 | Storage temperature, °С | From – 20 to + 60 |
| 15 | Relative humidity, % | Up to 90 without condensation |
| 16 | Atmospheric pressure, mm Hg | 630 – 800 |
| 17 | Dimensions, mm | 510х300х350 |
| 18 | Weight, kg, not more than | 30 |
- automated and accurate measurement of breakdown voltage up to 100 kV;
- instantaneous (4 µs) test voltage shutoff upon breakdown;
- an integrated printer is available, measurement results can be printed out;
- there is a USB connector for connecting a flash drive; it is possible to record the information from the test data archive in order to further rerecord it on a computer;
- easy and convenient to operate and maintain.
BREAKDOWN VOLTAGE TESTER TOR-80
The unit is designed to measure the dielectric strength of transformer oil and other dielectric fluids according to IEC 60156, ASTM D877, ASTM D1816.
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.
Operating principle
The core of the unit is the high voltage transformer and electronic modules. The unit operates by gradually increasing the voltage on the secondary winding of the high voltage transformer from zero to the maximum voltage, or to the voltage at which an electric breakthrough occurs in the dielectric fluid in the measuring cell installed on the high voltage contacts of the transformer.
The voltage in the secondary winding of the transformer occurs due to gradual increase of voltage in the primary winding supplied with sinusoidal voltage from the control inverter, one of the electronic modules.
Voltage increase is managed by a microcontroller through the control inverter. The control inverter is commanded by the unit control module.
During operation, AC (50-60Hz) voltage is supplied from the secondary winding terminals through the cell electrodes into the dielectric fluid in the measuring cell. The breakthrough occurs between the electrodes in the space filled with the dielectric fluid.
| no | Item | Value |
| 1 | Operating AC voltage, V | 85 – 264 |
| 2 | Power frequency, Hz | 48 – 63 |
| 3 | Power requirement, VA | 250 max |
| 3 | Max voltage output, kV | Sinusoidal, up to 80 kV |
| 4 | Output voltage measurement accuracy | ±2 % |
| 5 | Voltage increase rate, kV/sec | 0,1 to 5 * |
| 6 | Resolution of output voltage indication, V | 100 |
| 7 | High voltage timeout after breakthrough, ms | 10 max, 4 typical |
| 8 | Measuring cell volume, cm3 (in3) | 500 (30) |
| 9 | Ambient temperature measurement range, °С (°F) | 0 – 100 (32 – 212) |
| 10 | Temperature measurement resolution, °С (°F) | 1 (34) |
| 11 | Inbuilt printer | Yes |
| 12 | Operating temperature , °С (°F) | 0 – 50 (32 – 122) |
| 13 | Storage temperature, °С (°F) | From – 20 (– 4) to + 60 (140) |
| 14 | Relative humidity, % | Up to 90 without condensation |
| 15 | Dimensions, mm (in) | 490 (19) Х 320 (13) Х 300 (12) |
| 16 | Weight, kg (lbs), max | 25 (55) |
*- Adjustable
- automated and accurate measurement of breakdown voltage up to 80 kV;
- instantaneous (4 μs) disconnection of the test voltage upon breakdown;
- can work autonomously or in a network with transferring results to a PC, creating a local database, generating reports, plotting graphs and printing results;
- there is software for the implementation of standard and custom measurement procedures – the device can be used for research purposes;
- simple and easy to operate and maintain.