4.136
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
Figure 4.95
Load-Encroachment Logic for Y Side
Load-Encroachment Setting Example
Example system conditions:
The PTs are connected line-to-neutral.
q
To Figure 4.87
(90°)
(270°) (—90°)
(0°)
(180°)
Example Settings
X
1
R
1
Positive-Sequence Threshold = (Phase Channels Nominal Rating) • (0.1)
Load In
ZLOUTY
ZLOADY
Load Out
ZLINY
PLAFY
> ∠
Z
1Y
>
NLAFY
NLARY
>
∠
Z
1Y
>
PLARY
Pos.-Seq.
Threshold
|Z
1Y
| (Magnitude)
∠
Z
1Y
(Angle)
V
1Y
I
1Y
V
1Y
I
1Y
Z
1Y
=
Relay
Word
Bits
ZLFY
ZLRY
Settings
ZLINY
(Load In
Region)
ZLOUTY
(Load Out
Region)
ZLR
Y = 19
.00
Ω
sec.
NLAR
Y = 217
°
PLAR
Y = 162
°
PLAFY = 2
6°
NLAFY = —
18°
ZLFY = 11.
90
Ω
sec.
1
1
Nominal Line-Line Voltage: 230 kV
Maximum Forward Load: 800 MVA
Maximum Reverse Load: 500 MVA
Power Factor (Forward Load): 0.90 lag to 0.95 lead
Power Factor (Reverse Load): 0.80 lag to 0.95 lead
CT ratio: 2000/5 = 400
PT ratio: 134000/67 = 2000
Содержание SEL-700G Series
Страница 14: ...This page intentionally left blank ...
Страница 22: ...This page intentionally left blank ...
Страница 32: ...This page intentionally left blank ...
Страница 52: ...This page intentionally left blank ...
Страница 106: ...This page intentionally left blank ...
Страница 510: ...This page intentionally left blank ...
Страница 560: ...This page intentionally left blank ...
Страница 578: ...This page intentionally left blank ...
Страница 588: ...This page intentionally left blank ...
Страница 604: ...This page intentionally left blank ...
Страница 634: ...This page intentionally left blank ...
Страница 738: ...This page intentionally left blank ...
Страница 802: ...This page intentionally left blank ...
Страница 816: ...This page intentionally left blank ...