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OTS PB and OTS AF Range
Fully automatic insulating oil dielectric breakdown testing
FEATURES AND BENEFITS
COMMON ACROSS PB AND AF
Lock in precision oil vessel - lockable gap setting
Flat electrode gap gauges that will not damage
electrodes
Oil temperature is measured continuously so it can be
determined whether the oil test sample is within the
range allowed by the test standards before the test is
started
QVGA colour display with adjustable backlight (easy to
read in sunlight or dark conditions)
Large, easy clean test chamber with oil drain
High visibility test chamber
Safe operation with dual redundant micro switches
Intuitive user interface
Fully automatic operation with preloaded international
test standards
User configurable test sequences to cover transition
period of new / updated test standards (standards
maintained via USB updates from Megger)
All instruments supplied with one 400 ml test vessel in
the box as standard
Built onto a rigid box section chassis to prevent flexing
on impact that otherwise would damage the transformer
Unique built in chamber drain pipe for easy removal of
oil accidentally spilt in test chamber, this can easily be
connected to a lab waste system
Selecting favourite tests speeds up selection by only
displaying the standards regularly used by the user
OTS PB ADDITIONAL FEATURES AND BENEFITS
Small and lightweight, lightest on the market starting at
16.8 kg
Mains and battery powered for portable applications
OTS AF ADDITIONAL FEATURES AND BENEFITS
Barcode scanning capability for oil sample ID
Extra large test chamber for ease of use in high
productivity application
12 key alpha-numeric keypad to facilitate entry of test ID,
file names, notes etc.
OTS AF models
These 60 kV, 80 kV and 100 kV models have a much
larger test chamber for even easier access and cleaning,
particularly useful in a lab environment. They are fitted
with a 12 key alpha-numeric keypad to facilitate entry
of test ID, file names, notes etc. Alpha characters are
entered by repetitive pressing on a key. The AF models
also have the ability to use a USB barcode reader to scan
oil sample barcode labels, ideal for better integration
within a laboratory.
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.
In addition to the breakdown test, the withstand test
is a measure of the oils ability to withstand a constant
electrical stress. Failure to achieve this also indicates
contaminants.
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.
Refer to the OTSVesselPrep--2007-993_AN_en_V0# for
more details.
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