Table 143. Motor start-up supervision (STTPMSU) main settings
Parameter
Function
Value (Range)
Step
Motor start-up A
STTPMSU
1.0...10.0 × I
n
0.1
Motor start-up time
STTPMSU
1...80 s
1
Lock rotor time
STTPMSU
2...120 s
1
Operation
STTPMSU
1 = on
5 = off
-
Operation mode
STTPMSU
1 = IIt
2 = IIt, CB
3 = IIt + stall
4 = IIt + stall, CB
-
Restart inhibit time
STTPMSU
0...250 min
1
Table 144. MSCPMRI Group settings (Basic)
Parameter
Function
Value (Range)
Step
Warm start level
MSCPMRI
20.0...100.0%
0.1
Max Num cold start
MSCPMRI
1...10
1
Max Num warm start
MSCPMRI
1...10
1
Table 145. Phase reversal protection (PREVPTOC)
Characteristic
Value
Operation accuracy
Depending on the frequency of the measured current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time
1)2)
Minimum
Typical
Maximum
I
Fault
= 2.0 × set
Start value
23 ms
25 ms
28 ms
Reset time
Typically 40 ms
Reset ratio
Typically 0.96
Retardation time
<35 ms
Operate time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
Negative-sequence current before = 0.0, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2)
Includes the delay of the signal output contact
Table 146. Phase reversal protection (PREVPTOC) main settings
Parameter
Function
Value (Range)
Step
Start value
PREVPTOC
0.05...1.00 x I
n
0.01
Operate delay time
PREVPTOC
100...60000 ms
10
Operation
PREVPTOC
1 = on
5 = off
-
1MRS759144 A
REX640
Product version: 1
74
ABB
Summary of Contents for RELION REX640
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