Thermal Overload Protection For Motors (Mpttr); Thermal Overload Protection For Motors (Mpttr) Main Settings - ABB REX640 Product Manual

REX640
Product version: 1
Table 147. Thermal overload protection for motors (MPTTR)
Characteristic
Operation accuracy
1)
Operate time accuracy
1) Overload current > 1.2 × Operate level temperature
Table 148. Thermal overload protection for motors (MPTTR) main settings
Parameter
Overload factor
Alarm thermal value
Restart thermal Val
Weighting factor p
Time constant normal
Time constant start
Env temperature mode
Env temperature Set
Operation
Table 149. Stabilized and instantaneous differential protection for machines (MPDIF)
Characteristic
Operation accuracy
1)2)
Operate time
Reset time
Reset ratio
Retardation time
Suppression of harmonics
1) F = 50 Hz, results based on statistical distribution of 1000 measurements
n
2) Measured with static power output (SPO)
ABB
Function
MPTTR
MPTTR
MPTTR
MPTTR
MPTTR
MPTTR
MPTTR
MPTTR
MPTTR
Low stage
High stage
Value
Depending on the frequency of the measured current: f
Current measurement: ±1.5% of the set value or ±0.002 × I
in the range of 0.01...4.00 × I
n
±2.0% of the theoretical value or ±0.50 s
Value (Range)
1.00...1.20
50.0...100.0%
20.0...80.0%
20.0...100.0%
80...4000 s
80...4000 s
1 = FLC Only
2 = Use input
3 = Set Amb Temp
-20.0...70.0°C
1 = on
5 = off
Value
Depending on the frequency of the measured current: f
±3.0% of the set value or ±0.002 x I
Minimum Typical
32 ms 35 ms
9 ms 13 ms
Typically 40 ms
Typically 0.95
<20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5...
n
1MRS759144 A
±2 Hz
n
n
)
Step
0.01
0.1
0.1
0.1
1
1
-
0.1
-
±2 Hz
n
n
Maximum
37 ms
19 ms
(at currents
75