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Quality Testing


Cable & Phase Identification


Micro Ohm Meters

Laboratory Oil Testers 60,80,100 kV
Laboratory Oil Testers 60,80,100 kV
Laboratory instruments for measuring insulating oil breakdown voltage
Lock in precision – oil vessel with lockable adjustment
Bright 3.5” colour display
Suitable for mineral, ester and silicon oils
Trip detection circuit with direct measurement of voltage and current
Ultra fast (< 10 µs) HV switch off time
Megger’s automatic laboratory oil test sets perform accurate breakdown voltage tests on mineral, ester and silicon insulating liquids. Moulded test vessels give repeatable results with lock in precision electrode gap setting adjustment wheels. The transparent, shielded lid and large test chamber enable easy access to the test vessel.

All three laboratory models are fitted with a 12 key alphanumeric keypad to facilitate entry of test ID, filenames, notes etc. Alpha characters are entered by repetitive pressing on a key, the same way as text is entered modern cellular telephones.

Application:
Monitoring and maintenance of oil quality is essential in ensuring the reliable operation of oil filled electrical equipment. Codes of practice have been established in many countries that include several different types of test on insulating oils. One of the fundamental tests of oil quality is the breakdown voltage test, which is a measure of the oil’s ability to withstand electric stress. A low breakdown voltage can indicate the presence of contaminants such as water or conducting particles. Care should be taken to ensure the process of sampling oil and subsequent testing does not in any way contaminate it with foreign objects. Cleaning vessels between oil tests should be a rinse with the next sample, never clean with fibrous materials. To ensure an accurate reading set gap carefully and lock adjusting wheels.
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