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GUID-E040FFF4-7FE3-4736-8E5F-D96DB1F1B16B V1 EN
Figure 134:
Effect of the Weighting factor p factor and the difference between the two
time constants and one time constant models
The actual temperature of the transformer is calculated by adding the ambient temperature
to the calculated temperature.
Θ
Θ
Θ
= ∆
+
amb
GUID-77E49346-66D2-4CAB-A764-E81D6F382E74 V2 EN
(Equation 15)
Θ
temperature in transformer (°C)
ΔΘ
calculated temperature rise (°C) in transformer
Θ
amb
set value of the
Env temperature Set setting or measured ambient temperature
The ambient temperature can be measured with RTD measurement. The measured
temperature value is connected, for example, from the
AI_VAL3
output of the X130
(RTD) function to the
AMB_TEMP
input of 49T.
The
Env temperature Set
setting is used to define the ambient temperature if the ambient
temperature measurement value is not connected to the
AMB_TEMP
input. The
Env
temperature Set
setting is also used when the ambient temperature measurement
connected to 49T is set to “Not in use” in the X130 (RTD) function.
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
279
Technical Manual
Содержание Relion 615 series
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