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
REX640
Product version: 1
ABB
75
Summary of Contents for RELION REX640
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