When the maximum phase-to-phase voltage is larger than
DisarmU>
for the period
tDisarm
, it is ensured generator is on line. During this state, undervoltage operation is
disarmed, blocking the overcurrent operation and thus the function becomes
inoperative.
BLOCK input can be used to block AEGGAPC . In addition, the BLKTR input that
blocks the TRIP signal is also present. The input BLKTR can be used if AEGGAPC
is to be used only for monitoring purposes.
I>
Operation = ON
a
a>b
b
Imax_DFT
AND
BLOCK
TRIP
tOC
START
ARMED
S
R
NOUT
OUT
ArmU<
a
a<b
b
Uph-ph_max_DFT
t
tArm
ON - Delay
DisarmU>
a
a>b
b
t
tDisarm
ON - Delay
OR
AND
IEC09000784-2-en.vsd
t
IEC09000784 V2 EN
Figure 120:
AEGGAPC logic diagram
8.8.8
Technical data
Table 140:
AEGGAPC technical data
Function
Range or value
Accuracy
Operate value,
overcurrent
(5-900)% of IBase
± 1,0% of I
r
at I<I
r
± 1.0% of I at I>I
r
Reset ratio,
overcurrent
>95%
-
Transient overreach,
overcurrent function
<20% at τ = 100 ms
-
Critical impulse time,
overcurrent
10 ms typically at 0 to 2 x I
set
-
Impulse margin time,
overcurrent
15 ms typically
-
Operate value,
undervoltage
(2-150)% of UBase
± 0.5% of U
r
at U<U
r
± 0.5% of U at U>U
r
Table continues on next page
Section 8
1MRK 502 048-UEN A
Current protection
242
Technical manual
Summary of Contents for REG650 ANSI
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