Measures Temperature Increase in AC Windings in
Transformers
The Hot Winding Ohmmeter measures
AC winding temperatures during AC operation. It can be used
for AC motors, transformers and other AC coils. This
instrument uses the resistance method, measuring DURING
OPERATION. This equipment gives data logging of the test
results. It is available with 1 to 3 measurement
channels. This equipment makes it possible to measure
temperatures continuously during operation. The temperature
time curve can be recorded, giving an early indication that
temperatures are becoming too high or the temperature is
stabilizing (which shortens the
test). FEATURES
- Measures temperature rises during operation of motor
windings and all types of AC coils.
- 1 Channel Standard. Optional - can add up to 2 more
channels.
- Temperature rises are measured by the resistance method.
Resistance of Copper windings change approximately
4.0 promill per degree Centigrade, measuring
temperature change.
- Four pole Kelvin connections are used. Current
measurement terminal as well as voltage measurement
terminals is isolated.
- Cut-off capacitors are included to isolate mains from
measurement current. Special capacitors are available, as an
option, for higher voltages.
SPECIFICATIONS
- Can measure products utilizing currents to 15A
- Tests to IEC standards
Ranges 10-100-1000-10000 ohms
- Accuracy ± 1%
- Standard PC controls the measuring and logging results
- Data logged in time and graph on PC
- Data logging using optically isolated modem and logger
- Data logging is controlled by a PC using an RS232
interface
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