ABB 615 Series - Technical Data; Technical Revision History; Three-Phase Thermal Overload Protection, Two Time Constants 49 T.275; Identification

Name Type Values (Range) Unit Description
T_ENA_CLOSE INT32 0...60000 s 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
4.1.4.9 Technical data
Table 274: 49F Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured
current: f
n
±2 Hz
Current measurement: ±1.5% of the set value or
±0.002 × I
n
(at currents in the range of 0.01...4.00 ×
I
n
)
Trip time accuracy
1)
±2.0% of the theoretical value or ±0.50 s
1) Overload current > 1.2 × Trip level temperature
4.1.4.10 Technical revision history
Table 275: 49F Technical revision history
Technical revision
Change
C Removed the Sensor available setting parameter
D Added the AMB_TEMP input
E Internal improvement.
F Internal improvement.
4.1.5 Three-phase thermal overload protection, two time constants
49T
4.1.5.1 Identification
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/G/C 49T
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 275
Technical Manual