en06000458-
2_ansi.vsd
Apparent
impedance
calculation
Positive
sequence
current
phasor
Positive
sequence
voltage
phasor
Z
Z in
Z1 char.
Z in
Z2 char.
Dir.
Restrain
OR
Dir.Restrain Enabled
AND
AND
pickupZ1
0
TripZ1
TripZ2
tZ1
tZ2
0
pickupZ2
ANSI06000458 V2 EN
Figure 74:
Simplified logic diagram of LEXPDIS (40) protection
7.3.8
Technical data
Table 69:
LEXPDIS (40) technical data
Function
Range or value
Accuracy
X offset of Mho top point
(–1000.00–1000.00)% of Z
Base
± 2.0% of V
n
/I
n
Diameter of Mho circle
(0.01–3000.00)% of Z
Base
± 2.0% of V
n
/I
n
Timers
(0.00–6000.00) s
± 0.5% ± 25 ms
Operate time
55 ms typically
-
Reset ratio
105% typically
-
7.4
Out-of-step protection OOSPPAM (78)
7.4.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Out-of-step protection
OOSPPAM
<
78
1MRK 502 048-UUS A
Section 7
Impedance protection
173
Technical manual