Table 49. Phase reversal protection (PREVPTOC)
Characteristic
Value
Operation accuracy
Depending on the frequency of the current
measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 x I
n
Start time
1)2)
Minimum
Typical
Maximum
I
Fault
= 2.0 x set
Start
value
22 ms
24 ms
25 ms
Reset time
< 40 ms
Reset ratio
Typical 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 x 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 50. 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
Off
On
-
Table 51. Three-phase thermal overload protection for motors (MPTTR)
Characteristic
Value
Operation accuracy
Depending on the frequency of the current
measured: f
n
±2 Hz
Current measurement: ±1.5% of the set value
or ±0.002 x I
n
(at currents in the range of
0.01...4.00 x I
n
)
Operate time accuracy
1)
±2.0% of the theoretical value or ±0.50 s
1) Overload current > 1.2 x Operate level temperature
Motor Protection and Control
1MRS756890 D
REM615
Product version: 3.0
Issued: 2010-06-29
44
ABB
Summary of Contents for RELION REM615
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