STRV
0.6 * I>DIR
STFW
-RCA -85 deg
40% of
I>DIR
I>DIR
RCA
65 deg
U = -U
pol 2
I = I
op 2
RCA +85 deg
RCA -85 deg
Characteristic
for STRV
Operating area
Operating area
Characteristic
for STFW
Characteristic for reverse
release of measuring steps
Characteristic for forward
release of measuring steps
-RCA +85 deg
IEC11000269-2-en.ai
IEC11000269 V2 EN
Figure 73:
Operating characteristic for earth-fault directional element using the
negative sequence components
Two relevant setting parameters for directional supervision element are:
•
Directional element will be internally enabled to operate as soon as Iop is bigger
than 40% of
I>Dir
and directional condition is fulfilled in set direction.
•
Relay characteristic angle
AngleRCA
, which defines the position of forward and
reverse areas in the operating characteristic.
Directional comparison step, built-in within directional supervision element, will set
EF4PTOC function output binary signals:
1. STFW=1 when operating quantity magnitude Iop x cos(φ -
AngleRCA
) is bigger
than setting parameter
I>Dir
and directional supervision element detects fault in
forward direction.
2. STRV=1 when operating quantity magnitude Iop x cos(φ -
AngleRCA
) is bigger
than 60% of setting parameter
I>Dir
and directional supervision element detects
fault in reverse direction.
1MRK 504 135-UEN A
Section 8
Current protection
169
Technical manual
Содержание ret650
Страница 1: ...Relion 650 series Transformer protection RET650 Technical manual ...
Страница 2: ......
Страница 40: ...34 ...
Страница 62: ...56 ...
Страница 84: ...78 ...
Страница 208: ...202 ...
Страница 353: ...Table 236 Gray code conversion IEC06000523 V1 EN 1MRK 504 135 UEN A Section 12 Control 347 Technical manual ...
Страница 376: ...370 ...
Страница 414: ...408 ...
Страница 530: ...524 ...
Страница 562: ...556 ...
Страница 620: ...614 ...
Страница 668: ...662 ...
Страница 669: ...663 ...