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Section 4
1MAC050144-MB C
Protection functions
298
615 series ANSI
Technical Manual
4.5.1.8
Monitored data
Table 297: 49F Monitored data
4.5.1.9
Technical data
Table 298: 49F Technical data
4.5.2
Three-phase thermal overload protection for power
transformers, two time constants 49T
4.5.2.1
Identification
Name
Type
Values (Range)
Unit Description
TEMP
FLOAT32
-100.0...9999.9
°C
The calculated temperature of the protected
object
TEMP_RL
FLOAT32
0.00...99.99
The calculated temperature of the protected
object relative to the trip level
T_TRIP
INT32
0...600000
ms
Estimated time to trip
T_ENA_CLOSE
INT32
0...600000
ms
Estimated time to deactivate BLK_CLOSE
TEMP_AMB
FLOAT32
-99...999
°C
The ambient temperature used in the calculation
49F
Enum
1=enabled
2=blocked
3=test
4=test/blocked
5=disabled
Status
Characteristic
Value
Pickup accuracy
Depending on the frequency of the current
measured: f
n
±2Hz
Current measurement: ±1.5% of the set value or
±0.002 x I
n
(at currents in the range of 0.01...4.00 x
I
n
)
Trip time accuracy
1
1. Overload current > 1.2 x Trip level temperature
±2.0% of the theoretical value or ±0.50 s
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Three-phase thermal overload protection,
two time constants
T2PTTR
3Ith>T
49T
Содержание 615 Series ANSI
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Страница 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Страница 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
Страница 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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