ABB Relion, Техническое руководство

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The pickup signal starts a definite time delay. If the value of the pickup signal is one for
longer than the set time delay, the undervoltage step sets its trip signal to one.
This undervoltage functionality together with additional ACT logic can be used to provide
functionality for overcurrent protection with undervoltage seal-in.
8.10.8 Technical data
Table 153: VRPVOC (51V) technical data
Function Range or value Accuracy
Pickup overcurrent (2 - 5000)% of IBase ± 1.0% of I
r
at I<I
r
± 1.0% of I at I>I
r
Definite time delay (0.00 - 6000.00) s ± 0.5% ± 25 ms
Inverse characteristics,
see table 574 , table 575
and table 576
13 curve types ANSI/IEEE C37.112
IEC 60255–151
±
3% or
±
40 ms
0.10 ≤ k ≤ 3.00
1.5 x I
set
≤ I ≤ 20 x I
set
Operate time pickup
overcurrent
30 ms typically at 0 to 2 x I
set
20 ms typically at 0 to 10 x I
set
-
Reset time pickup
overcurrent
40 ms typically at 2 to 0 x I
set
-
Pickup undervoltage (2.0 - 100.0)% of VBase ± 0.5% of V
r
Operate time pickup
undervoltage
30 ms typically 2 to 0 x V
set
-
Reset time pickup
undervoltage
40 ms typically at 0 to 2 x V
set
-
High voltage limit, voltage
dependent operation
(30 - 100)% of VBase ± 1.0% of V
r
Reset ratio, overcurrent > 95% -
Reset ratio, undervoltage < 105% -
Overcurrent:
Critical impulse time
Impulse margin time
10 ms typically at 0 to 2 x I
set
15 ms typically
-
Section 8
1MRK 502 048-UUS A
Current protection
280
Technical manual