AUTOMATIC INSULATING OIL DIELECTRIC STRENGTH TESTERS
Portable automatic testers of OLT series are designed for dielectric strength testing of insulating oils (mineral and synthetic) with AC voltage up to 100 kVRMS at industrial frequency (f = 50/60 Hz).
Non-volatile memory of the OLT series testers stores up to 10 presets of test standards.
KEP Suite – a user-friendly accompanying software – allows to easily add, remove and modify the set of standards stored on the device, including creation of a deeply customised test sequences to accommodate every need.
The tests are performed with symmetrical sine-wave high voltage. The measurements are taken right on the electrodes of the test vessel while high voltage switch off time is only 5 μs. Clear signal and direct measuring circuit result in a reliable and accurate test results.
In order to start a test all an operator needs to do is to select a desired testing standard. After that the entire test cycle, including the necessary pauses, oil simple stirring and high voltage switch off following a breakdown runs fully automatically.
In order to comply with standards requiring oil sample stirring during a test, OLT series testers feature an integrated magnetic stirrer.
The oil sample temperature is measured using a built-in thermal sensor and subsequently recorded in the test report.
Non-volatile memory of the tester stores up to 128 detailed test reports which can be printed out on an integrated printer.
Test reports can also be exported to PC via KEP Suite proprietary software. After computer processing, the reports can be printed out or saved in TXT and PDF formats. In addition, KEP Suite allows editing testing standards, updating tester firmware, etc.
OLT series testers benefit from compact design without protrusions. Small dimensions and light weight provide comfort during transportation and save space of lab or field testing sites.
High level of operator safety is insured by all-round protective system compliant with IEC 61010 standard.
The test chamber is guarded by perforated lid allowing to monitor the process visually. High voltage is immediately cut-off in the event the lid gets open during a test.
The tester's case is shielded and fitted with reliable protective earthing system.
|Test parameters||Output voltage||Breakdown voltage determining and indication range||20 … 80 kVRMS||20 … 100 kVRMS|
|Relative indication error||± 3 %|
|Indication resolution||0.1 kV|
|Frequency||50 / 60 Hz|
|Voltage ramp-up setting range||0.5 … 10 kV/s|
|Switch off time on breakdown||< 5 μs|
|Oil sample temperature||Determining and indication range||minus 55 … + 125 ˚C|
|Indication resolution||1 °C|
|System parameters||Test mode||Automatic|
|Supported testing standards||
■ IEC 60156-95
■ GOST 6581-75
■ ASTM D877
■ IP 295
■ IRAM 2341
■ Single test
■ Other (user-defined)
|Interfaces||Display||Monochrome, 128 × 64 px|
■ Others (option)
|Connection interfaces||USB-B (PC connection)|
■ up to 10 testing standards
■ up to 128 test results
|Printer||Built-in thermal printer, (paper roll width 57 mm)|
|Safety||Grounding||■ Protective earthing|
|High voltage switch off||■ Automatic power cut-off on opening the test compartment lid|
|Power supply and consumption||Mains supply voltage||230 VAC, ± 10 % (110 Hz option)|
|Mains supply frequency||50 / 60 Hz|
|Power consumption||up to 100 V•А|
|Physical||Dimensions, H × W × D||278 × 461 × 274 mm||312 × 555 × 312 mm|
|Weight||21 kg||32 kg|