Description

Dielectric Tester
Transformer Oil Breakdown Voltage (BDV) Test Set

Oil testers bring out accurate and repeatable results of measured breakdown voltage. Fast high-voltage switch off time makes it possible to carry out test of dielectric liquids, which are easily destroyed under such influences.

The internal design of OLT testers combined with a use of automatic high voltage breakers, cutting off supplied voltage if tester’s lid has been opened during the test, provide operator with high level of safety.

Testers are fully equipped and are ready for operation right after unpacking. They come with a test vessel (IEC 60156 – basic configuration) with VDE 0370 mushroom-shape electrodes. A gap between electrodes is easily regulated with a use of pass-no pass gauge, which comes in pack.

A-series provides with fully automatic test procedure according to selected standard (basically IEC 60156 and GOST 6581 settings are preloaded). It has a built-in printer which is able to print a test report after procedure is done. Test results are saved into non-volatile memory of OLT oil tester. A PC-connectivity makes it easy to collect data from OLT oil tester, save and store them as well as print a fulfilled report. Test voltage is being measured directly on electrodes. This fact combined with a true sine voltage shape (independent from supply voltage shape), increases repeatability and accuracy of measurements.

Test vessel for this series goes with magnetic stirrer, which stirs a liquid between two measurements.

MAIN FEATURES:

• Compact and lightweight
• Fully automatic operation
• Fully compatible with IEC 60156
• Preloaded testing programs for different standards
• Built-in printer
• PC connectivity
• Internal test data storage
• Precise direct voltage measurement
• True sine high-voltage on electrodes
• Oil temperature measurement

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	520 × 300 × 320
OLT-100 dimensions (W × H × D), mm	530 × 315 × 320
Net weight OLT-80/ OLT-90/OLT-100, kg	21/25/30

Operating Conditions

The device is designed for an indoors operation under the following conditions:

Condition	Value
Air temperature, °С	from +10 to +35
Relative humidity, %, up to	80 at +25° С
Atmospheric pressure, kPa (mm hg)	84,0 – 106,7 (630 – 800)

All persons involved in operating and maintenance of the device, must first be trained in safe working practices of the device.

Documentation
User’s Manual	1
ISO/IEC 17025 calibration certificate (on Customer’s request)	Optional

* – Additional test vessels are available on request

Package Contents

Component	Quantity
OLT oil tester	1
Test vessel* IEC 60156 with electrodes and cover	1
Go/No-Go gauge	1
Magnetic stirrer	1
Lifting stick for magnetic stirrer	1
USB cable (A-B type)	1
Power cord (C-type plug.)	1
Grounding cable	1
Software on USB flash-drive	1
Fuses (250V/3A)	2
Paper roll (inside the printer)	1
C-80 (C-100) calibration kit	Optional

Warranty