Voltage-Restrained Time Overcurrent Protection Vr2Pvoc(51V) - ABB REG650 Technical Manual

Section 8
Current protection
8.10
8.10.1
8.10.2
244
Function
Time characteristics
Inverse time
characteristic step 1,
2
=
I t K
2
Reset time, inverse
characteristic step 1,
2
=
I t K
2
Maximum trip delay, step
1 IDMT
Minimum trip delay, step
1 IDMT
Timers
Voltage-restrained time overcurrent protection
VR2PVOC(51V)
Identification
Function description
Voltage-restrained time overcurrent
protection
Functionality
Voltage-restrained time overcurrent protection (VR2PVOC, 51V) function is
recommended as a backup protection for generators.
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 with the
function in order to provide funcionality for overcurrent protection with undervoltage
seal-in.
Range or value
Definite or Inverse
K=1.0-99.0
K=0.01-20.00
(0.00-6000.00) s
(0.000-60.000) s
(0.00-6000.00) s
IEC 61850
identification
VR2PVOC
1MRK 502 043-UUS B
Accuracy
-
± 3% or ± 40 ms
1 ≤ K ≤ 20
± 10% or ± 50 ms
1 ≤ K ≤ 20
± 0.5% ± 25 ms
± 0.5% ± 25 ms
± 0.5% ± 25 ms
IEC 60617 ANSI/IEEE C37.2
identification device number
U<I> 51V
Technical Manual