ABB Relion 670 series - Page 452

ANSI11000306_2_en.vsd
EnableUV =
a<b
a
b
uP1P2
27_COMP
Comparator
with
hysterisis relative as 5%
a
<
b
a
b
uP2P3
27_COMP
Comparator
with
hysterisis relative as 5%
a
<
b
a
b
uP3P1
27_COMP
Comparator
with
hysterisis relative as 5%
OR
Zone 3 pickup
AND
AND
OR
b0
b1
int
Zone2 picukp
q
-1
OR
AND
tPulse =
1
sec
27 Trip
q
-
1
27 PU
0 = UV OFF
1 =
Z2 pickup
2 = Z3 pickup
OR
BLKUV
BLOCK
Drop-Off
timer
10 ms
0
0
timeDelay27
ANSI11000306 V3 EN-US
Figure 244: Under voltage seal-in for zone 2 and zone 3
7.15.8 Technical data
GUID-E8104D00-3183-4F55-89F9-A74B14BFE6FE v4
Table 203: ZGVPDIS (21) Technical data
Function Range or value Accuracy
Number of zones 3 -
Forward reach
(3.0 - 200.0)% of Z
n
where Z
n
=VBase/√3∗IBase
±5.0% of set impedance
Conditions:
Voltage range: (0.1 - 1.1) x V
n
Current range: (0.5 - 30) x I
n
Reverse reach
(3.0 - 200.0)% of Z
n
where Z
n
=VBase/√3∗IBase
±5.0% of set impedance
Conditions:
Voltage range: (0.1 - 1.1) x V
n
Current range: (0.5 - 30) x I
n
Impedance angle (5 - 90) degrees -
Reset ratio 105% typically -
Pickup time at 1.2 to 0.8 x set
impedance
Min. = 15 ms
-
Max. = 35 ms
Independent time delay to operate
at 1.2 to 0.8 x set impedance
(0.000 – 60.000) s ±0.2% or ±40 ms whichever is greater
Section 7 1MRK 502 066-UUS B
Impedance protection
446
Technical manual