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