ABB RELION 670 Series Technical Manual page 452

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