Oil tester OLT-80A is designed for determining the breakdown voltage of the transformer oil and other liquid dielectrics in accordance with GOST 6581-75, and most other international and national standards (rate volatge rise, agitation algorithm, the shape of the electrodes and the distance between them).

The divice can store up to 200 last measurements and has the ability to save the results to a computer.

OLT-80A can operate in both manual and fully automatic modes.

In the fully automatic mode, OLT-80A can perform the following:

The time delay between trials (first and subsequent);
Mixing samples of the dielectric;
Calculation of the average breakdown voltage and the coefficient of variation;
Signaling upon completion of the work;
Printing a report on the built-in printer.
The unit features both Russian and English interface menu languages.

Technical Specifications
Characteristic Value
Output AC voltage (symmetrical),
OLT-80/OLT-90/OLT-100, kV rms
80/90/100
Voltage resolution, kV
0.1
Measurement uncertainty, % of reading 3
Output voltage rise rate, kV/s
2 ± 0.2 – basic (changes according to selected standard)
Switch-off time on breakdown, μs < 5
Temperature measuring range, °C 5.0 – 50.0
Programmed test sequences IEC 60156 (BS EN 60156, CEI EN 60156, NF EN 60156, UNE EN 60156, SABS EN 60156, PA SEV EN 60156) GOST 6581
Electrodes “mushroom” type IEC 60156
Test vessel IEC 60156, 400 ml, 1.0 kg
Go/No-Go gauge width, mm 2.45 / 2.55
Display resolution 128 × 64 dot matrix, monochrome
Interface languages English, Russian, Turkish
Printer thermal line, 8 dots/mm, 384 dots/line
Memory for results, cells 512
PC connectivity USB B-type
Input voltage, V 230 ± 10% (basic),
110/120 – on request
Line frequency, Hz 50/ 60 ± 1
Power consumption OLT-80/ OLT-90/OLT-100, VA
100/120/140
OLT-80 dimensions (W × H × D), mm
461 × 280 × 271
OLT-90 dimensions (W × H × D), mm 420 × 300 × 320
OLT-100 dimensions (W × H × D), mm 530 × 315 × 320
Net weight OLT-80/ OLT-90/OLT-100, kg
21/25/30