Tettex TTR 2795, Operating Instructions Manual

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Safety 7
2 Safety
2.1 Safety
Safety is the responsibility of the user. Always operate the equipment in accordance with
the instructions, always paying full attention to local safety practices and procedures
This equipment must be operated only by trained and competent personnel who are aware
of the dangers and hazards involved in testing transformers. HAEFELY TEST AG accepts
no liability for loss, damage, injury or death caused by the incorrect or unsafe operation of
this instrument
Do not operate the TTR 2795 from a variable power supply. The TTR 2795 adjusts to the
local line voltage at start-up. Changing the line voltage while the unit is in operation may
cause damage to the unit and to the test object
Hazardous voltages exist on the terminals of the instrument when the “Active” lamps are lit.
Never assume that the connections are safe if these lamps are extinguished. Switch off and
unplug the unit before touching the connections, particularly if a fault is suspected
Use only the supplied Remote Control Cable (USB-to-RS-232, 1:1, pin 6+7 removed).
Do NOT use normal RS-232 or RS-232 to USB cables without removed pins 6&7. This
could damage the unit!
2.2 Grounding
The instrument must always be connected to a grounded power outlet (i.e. a safety earth) It must never be operated
in a non-grounded configuration as this may result in electrical shock to the user or damage to the instrument.
Where possible the outer casing of the transformer under test should also be connected to a safety earth to prevent
the risk of shock. Where this cannot be achieved, adequate precautions should be taken to prevent access to the
transformer, such as barriers.
2.3 Essential Safety Recommendations
Before connecting the instrument ensure that the transformer to be tested is completely
de-energized and isolated from both line and load. Every terminal should be checked and
verified before connection of the instrument. Ground connections may be left in place
Never exchange connections to the HV and LV sides of the transformer. The “H”
connections must always be connected to the High Voltage side of the transformer. The
“X” connections must always be connected to the Low Voltage side of the transformer.
Interchanging any or all of the connections may result in damage to the transformer or the