Technical Data - ABB Relion Technical Manual

Section 8
Current protection
8.10.8
280
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.

Technical data

Table 153: VRPVOC (51V) technical data
Function
Pickup overcurrent
Definite time delay
Inverse characteristics,
see table 574, table 575
and table 576
Operate time pickup
overcurrent
Reset time pickup
overcurrent
Pickup undervoltage
Operate time pickup
undervoltage
Reset time pickup
undervoltage
High voltage limit, voltage
dependent operation
Reset ratio, overcurrent
Reset ratio, undervoltage
Overcurrent:
Critical impulse time
Impulse margin time
Range or value
(2 - 5000)% of IBase
(0.00 - 6000.00) s
13 curve types
30 ms typically at 0 to 2 x I
set
20 ms typically at 0 to 10 x I
set
40 ms typically at 2 to 0 x I
set
(2.0 - 100.0)% of VBase
30 ms typically 2 to 0 x V
set
40 ms typically at 0 to 2 x V
set
(30 - 100)% of VBase
> 95%
< 105%
10 ms typically at 0 to 2 x I
set
15 ms typically
1MRK 502 048-UUS A
Accuracy
± 1.0% of I at I<I
r r
± 1.0% of I at I>I
r
± 0.5% ± 25 ms
ANSI/IEEE C37.112
IEC 60255–151
±3% or ±40 ms
0.10 ≤ k ≤ 3.00
1.5 x I ≤ I ≤ 20 x I
set set
-
-
± 0.5% of V
r
-
-
± 1.0% of V
r
-
-
-
Technical manual