Heat run test on transformers consist of two steps:
■
Heat Rise: The transformer runs at nominal losses and
transformer temperature rises.
■
Cooling Curve: The transformer is disconnected and winding
resistance is measured.
The 2293 performs the measurements on both steps. It
monitors the transformer temperature during the heat rise and
measures HV and LV side resistances simultaneously during
the cooling curve.
HEAT RUN TEST
For the heat rise, connection of the temperature sensors
could not be easier. The included 6 temperature inputs can
be easily extended up to 30 by using the optional
temperature extension box (2293/TEMP). The available
magnetic and liquids temperature probes (2293/TEMP2,
2293/TEMP1) are easily connected to the transformer.
Probe configuration is done graphically (oil, radiator top,
radiator bottom, ambient…).
In addition, pre-configured tests according to ANSI and
IEC standards are included, calculating the transformer
temperature in real time and informing when stabilization
is reached.
For the cooling curve, the 2293 can measure HV and LV
side resistances simultaneously and accurately. It provides
efficient and accurate acquisition of the required data
points to allow the user to draw the necessary cooling
curve. Results can be easily exported to CSV files to
calculate the winding temperature at switching off time.
HEAT RISE
COOLING CURVE
12
13
Connect up to
30 temperature sensors
to the WA 2293
Pre-configures
test according to
ANSI & IEC