MESSKO MTeC EPT202, Operating Instructions Manual

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15
BA 2076/02/01
Calculation in accordance with IEC 354, Calculation in accordance with IEC 354, Calculation in accordance with IEC 354, Calculation in accordance with IEC 354, Calculation in accordance with IEC 354,
second edition 1991-9
second edition 1991-9 second edition 1991-9 second edition 1991-9 second edition 1991-9
Recommended for transformers whose construction was
based on IEC standards.
With this calculation algorithm, the EPT202 places relative
thermal rate of aging as per IEC 354 in relation to the
expected lifespan and calculates the life consumption as a
percentage (like the ANSI standard).
5.10 5.10 5.10 5.10 5.10 Data Logging Data Logging Data Logging Data Logging Data Logging
The EPT202 is equipped with an internal memory in which
data are stored. The time interval between storage (data
logging) of two data records can be parameterized as desired.
In addition, data sets are also stored when the following
events occur:
• Power supply - on / off
• Test mode - activated / deactivated
• Trip - activated / deactivated
• Alarm - activated / deactivated
• Device error - activated / deactivated
• Switching contacts (S1 to S4) - activated / deactivated
• Device lock - locked / unlocked
The data memory can hold a total of approx. 32,000 data
records. At an interval of 10 minutes, this means that data
covering a period of approx. 7.5 months can be stored.
The data records can be loaded with the visualization
software and evaluated with an Excel spreadsheet. A data
record contains the following information.
•
· Set no.
•
Date
•
Time
•
Device status with status indication of the switching
contacts and all relevant device data
•
Event (is usually not used)
•
Error code with status indication of the individual errors
•
Oil temperature
•
3 winding temperatures (winding temperature 1 for basic
device, winding temperature 2 and 3 only with appropriate
extra module)
•
Load current (load current 1 for basic device, load current
2 and 3 only with corresponding extra module)
•
Life consumption
•
Oil level of the oil conservator of the transformer tank
(only with corresponding extra module)
•
Oil level of the oil conservator of the OLTC/LTC (only with
corresponding extra module)
•
3 in reserve (not usually used)
5.1 5.1 5.1 5.1 5.11 1 1 1 1 Masking Out the Winding T Masking Out the Winding T Masking Out the Winding T Masking Out the Winding T Masking Out the Winding Temper emper emper emper emperatur atur atur atur ature ee ee
When the EPT202 is only used to indicate the oil temperature
and to control the switching contacts via the oil temperature,
the simulation of the thermal image (winding temperature)
can be masked out with the <Winding off> function.
The following functions are then deactivated.
•
CT input
•
Analog output 2 (winding temperature)
•
Life consumption calculation
•
Parameterization of the winding parameters for the device
and the visualization software
•
All menu items on the device and all setting options in the
visualization software which are related to the winding
temperature
The menu items which are masked out with this function are
marked in the short operating instructions with an
asterisk (*).
5 Function Description