Three-Phase Thermal Overload Protection, Two Time Constants T2Pttr - ABB RELION 620 Series Technical Manual

1MRS757644 H
4.1.6.9 Technical data
Table 330: T1PTTR Technical data
Characteristic
Operation accuracy
Operate time accuracy
4.1.6.10 Technical revision history
Table 331: T1PTTR Technical revision history
Technical revision
C
D
E
F
4.1.7 Three-phase thermal overload protection, two time
constants T2PTTR
4.1.7.1 Identification
Function description
Three-phase thermal overload pro-
tection, two time constants
4.1.7.2 Function block
Figure 170: Function block
1
Overload current > 1.2 × Operate level temperature
620 series
Technical Manual
Value
Depending on the frequency of the measured
current: f ±2 Hz
n
Current measurement: ±1.5% of the set value
or ±0.002 × I (at currents in the range of
n
0.01...4.00 × I
n
±2.0% of the theoretical value or ±0.50 s
Change
Removed the Sensor available setting param-
eter
Added the
AMB_TEMP
Internal improvement.
Internal improvement.
IEC 61850 IEC 60617
identification identification
T2PTTR 3Ith>T/G/C
Protection functions
)
input
ANSI/IEEE C37.2
device number
49T/G/C
343