Three-Phase Thermal Overload Protection, Two Time Constants (T2Pttr) - ABB REX640 Product Manual

REX640
Product version: 1
Table 97. Three-phase thermal protection for feeders, cables and distribution transformers (T1PTTR) main settings
Parameter
Env temperature Set
Current reference
Temperature rise
Time constant
Maximum temperature
Alarm value
Reclose temperature
Current multiplier
Initial temperature
Table 98. Three-phase thermal overload protection, two time constants (T2PTTR)
Characteristic
Operation accuracy
1)
Operate time accuracy
1) Overload current > 1.2 x Operate level temperature
Table 99. Three-phase thermal overload protection, two time constants (T2PTTR) main settings
Parameter
Temperature rise
Max temperature
Operate temperature
Short time constant
Weighting factor p
Current reference
Operation
60
Function
T1PTTR
T1PTTR
T1PTTR
T1PTTR
T1PTTR
T1PTTR
T1PTTR
T1PTTR
T1PTTR
Function
T2PTTR
T2PTTR
T2PTTR
T2PTTR
T2PTTR
T2PTTR
T2PTTR
Value (Range)
-50...100°C
0.05...4.00 × I
n
0.0...200.0°C
60...60000 s
22.0...200.0°C
20.0...150.0°C
20.0...150.0°C
1...5
-50.0...100.0°C
Value
Depending on the frequency of the measured current: f
Current measurement: ±1.5% of the set value or ±0.002 x I
in the range of 0.01...4.00 x I )
n
±2.0% of the theoretical value or ±0.50 s
Value (Range)
0.0...200.0°C
22.0...200.0°C
80.0...120.0%
6...60000 s
0.00...1.00
0.05...4.00 × I
n
1 = on
5 = off
1MRS759144 A
Step
1
0.01
0.1
1
0.1
0.1
0.1
1
0.1
±2 Hz
n
(at currents
n
Step
0.1
0.1
0.1
1
0.01
0.01
-
ABB