E l e c t r o n i c T e m p e r a t u r e M o n i t o r
1 5
•
Fan / Alarm / Trip setpoint and switching differential (hyteteresis) can be set
to determine at what temperature the relays turn on and off.
•
Trip relay can be set to failsafe (normally energized) or not failsafe
(normally de-energized).
•
Trip relay can be set to operate from (internal) ambient temperature. This
feature is activated when the optional heater kit is installed.
•
Fan Exerciser – the fan exerciser function can be turned ON or OFF. When
it is ON, the time between turning the fans on, and the run time can be set.
•
Fan Bank Switching – if the fan bank function is enabled, the first fan bank
to come on will alternate between the two fan banks to even out the wear on
the fan motors.
•
SCADA Remote Output can be set to 0-1 mA or 4-20 mA (if option
installed).
•
The communications parameters for the optional RS-485 output can be set
(if option installed).
•
Send configuration data to ETM – This will cause the displayed
configuration data to be written to the ETM. After the data is changed in the
ETM memory, the ETM will reset to activate the new values.
•
Send configuration data and winding rise to ETM – This will cause the
displayed configuration data, and the winding rise curves to be written to the
ETM. After the data is changed in the ETM memory, the ETM will reset to
activate the new values.
•
Get configuration data from ETM – This reads the configuration currently in
the ETM and displays that data on the screen.
•
Save – This will save the current configuration to the current open file (if it
is the default file, it will overwrite it).
•
Save as – Allows the current configuration to be saved to a new file name or
different path.
•
Done – exits this window.
Print Configuration -
Prints the configuration screen and also prints the
winding rise screen.
Winding Rise
Winding Rise
Winding Rise
Winding Rise
The 111W stores winding rise tables that allow the calculation of winding
temperature from the oil temperature and the winding current.
Create Winding Rise Data
– This screen provides for the entry of
information allowing the calculation of three different winding rise tables. One
table with only convection cooling, one table with the first stage of cooling on
and one table with all cooling on. To calculate the winding rise tables, a single
winding rise temperature (above oil temperature) at a known current is required
for each stage of cooling, along with an exponent for the winding rise equation
(1.6 for most transformers). If the gradient value for each cooling stage is not