GE T60, Инструкция по эксплуатации

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GE Multilin T60 Transformer Protection System 5-119
5 SETTINGS 5.4 SYSTEM SETUP
5
j) TRANSFORMER THERMAL INPUTS
PATH: SETTINGS

SYSTEM SETUP

TRANSFORMER

THERMAL INPUTS
The thermal inputs settings are used for computation of hottest-spot winding temperature, aging factor, and accumulated
loss of life.
• WINDING CURRENTS : Enter a source that represents the true winding load currents.
In cases where two or more sets of CTs are associated to the winding and where thermal elements are to be
set (for example, in a breaker-and-a-half scheme), a spare source for current summation from these CTs
should be used to obtain the total true winding current. Otherwise, select the only source representing the
other winding current.
• AMBIENT TEMPERATURE : Select an RTD, DCmA, or remote RTD input if the ambient temperature is to be mea-
sured directly. Otherwise, select “Monthly Average” and enter an average temperature for each month of the year if a
directly measured device output is not available (see monthly settings below).
• TOP OIL TEMPERATURE : Select RTD, DCmA, or remote RTD input for direct measurement of top-oil temperature. If
an RTD or DCmA input is not available, select “Computed”.
The following menu will be available when
AMBIENT TEMPERATURE
is “Monthly Average”.
PATH: SETTINGS

SYSTEM SETUP

TRANSFORMER

THERMAL INPUTS

AMBIENT TEMPERATURE

THERMAL INPUTS

WINDING CURRENTS:
SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
(or the user-defined name)
MESSAGE
AMBIENT TEMPERATURE:
RTD Input 1
Range: RTD Input 1, RTD Input 2,..., RTD Input 8, DCmA
Input 1, DCmA Input 2,..., DCmA Input 8, RRTD
1, RRTD2,..., RRTD 12, Monthly Average
MESSAGE
TOP-OIL TEMPERATURE:
RTD Input 1
Range: RTD Input 1, RTD Input 2,..., RTD Input 8, DCmA
Input 1, DCmA Input 2,..., DCmA Input 8, RRTD
1, RRTD2,..., RRTD 12, Monthly Average
AMBIENT TEMPERATURE:
Monthly Average
JANUARY AVERAGE:
–20°C
Range: –60 to 60°C in steps of 1
MESSAGE
FEBRUARY AVERAGE:
–30°C
Range: –60 to 60°C in steps of 1
MESSAGE
MARCH AVERAGE:
–10°C
Range: –60 to 60°C in steps of 1
↓
MESSAGE
DECEMBER AVERAGE:
–10°C
Range: –60 to 60°C in steps of 1
NOTE