ABB REG670 - Voltage-Restrained Time Overcurrent Protection VRPVOC

Function Range or value Accuracy
Impulse margin time,
undervoltage
15 ms typically -
Operate value,
overvoltage
(2-200)% of UBase ±0.5% of U
r
at U ≤ U
r
±0.5% of U at U > U
r
Definite time delay,
overcurrent, at 0 to 2 x
I
set
(0.000-60.000) s ±0.2% or ±35 ms whichever is
greater
Definite time delay,
undervoltage, at 1.2 x
U
set
to 0.8 x U
set
(0.000-60.000) s ±0.2% or ±35 ms whichever is
greater
Definite time delay,
overvoltage, at 0.8 x
U
set
to 1.2 x U
set
(0.000-60.000) s ±0.2% or ±35 ms whichever is
greater
8.14 Voltage-restrained time overcurrent protection
VRPVOC
8.14.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Voltage-restrained time overcurrent
protection
VRPVOC I>/U< 51V
8.14.2 Functionality
Voltage-restrained time overcurrent protection (VRPVOC) function can be used as
generator backup protection against short-circuits.
The overcurrent protection feature has a settable current level that can be used either
with definite time or inverse time characteristic. Additionally, it can be voltage
controlled/restrained.
One undervoltage step with definite time characteristic is also available within the
function in order to provide functionality for overcurrent protection with undervoltage
seal-in.
Section 8 1MRK502052-UEN B
Current protection
446
Technical manual