ABB Relion REM615 Product Manual page 44

Motor Protection and Control
REM615
Product version: 3.0
Table 49. Phase reversal protection (PREVPTOC)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Negative-sequence current before = 0.0, f
2) Includes the delay of the signal output contact
Table 50. Phase reversal protection (PREVPTOC) main settings
Parameter
Start value
Operate delay time
Operation
Table 51. Three-phase thermal overload protection for motors (MPTTR)
Characteristic
Operation accuracy
1)
Operate time accuracy
1) Overload current > 1.2 x Operate level temperature
44
I = 2.0 x set Start
Fault
value
= 50 Hz, results based on statistical distribution of 1000 measurements
n
Function
PREVPTOC
PREVPTOC
PREVPTOC
Value
Depending on the frequency of the current
measured: f ±2 Hz
n
±1.5% of the set value or ±0.002 x I
Minimum Typical
22 ms 24 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n x f
n
...
Value (Range)
0.05...1.00 x I
n
100...60000 ms
Off
On
Value
Depending on the frequency of the current
measured: f ±2 Hz
n
Current measurement: ±1.5% of the set value
or ±0.002 x I (at currents in the range of
n
0.01...4.00 x I )
n
±2.0% of the theoretical value or ±0.50 s
1MRS756890 D
Issued: 2010-06-29
n
Maximum
25 ms
, where n = 2, 3, 4, 5,
Step
0.01
10
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ABB