ABB REG670 - Technical Data

The start signal starts a definite time delay. If the value of the start signal is logical
TRUE for longer than the set time delay, the undervoltage step sets its trip signal to
logical TRUE.
This undervoltage functionality together with additional ACT logic can be used to
provide functionality for overcurrent protection with undervoltage seal-in.
8.14.8 Technical data
Table 247: VRPVOC technical data
Function Range or value Accuracy
Start overcurrent (2.0 - 5000.0)% of IBase ±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Reset ratio,
overcurrent
> 95% -
Operate time, start
overcurrent at 0 to 2 x
I
set
Min. = 15 ms -
Max. = 30 ms
Reset time, start
overcurrent at 2 to 0 x
I
set
Min. = 15 ms -
Max. = 30 ms
Operate time, start
overcurrent at 0 to 10
x I
set
Min. = 5 ms
Max. = 20 ms
-
Reset time, start
overcurrent at 10 to 0
x I
set
Min. = 20 ms
Max. = 35 ms
-
Independent time
delay to operate at 0 to
2 x I
set
(0.00 - 6000.00) s ±0.2% or ±35 ms whichever is
greater
Inverse time
characteristics,
see tables 959 and
960
13 curve types
See tables 959 and 960
Minimum operate time
for inverse time
characteristics
(0.00 - 60.00) s
±0.2% or ±35 ms whichever is
greater
High voltage limit,
voltage dependent
operation
(30.0 - 100.0)% of UBase
±1.0% of U
r
Start undervoltage (2.0 - 100.0)% of UBase ±0.5% of U
r
Reset ratio,
undervoltage
< 105% -
Operate time start
undervoltage at 2 to 0
x U
set
Min. = 15 ms -
Max. = 30 ms
Reset time start
undervoltage at 0 to 2
x U
set
Min. = 15 ms -
Max. = 30 ms
Table continues on next page
Section 8 1MRK502052-UEN B
Current protection
452
Technical manual