Toshiba GR200 Series Instruction Manual page 148

X.Reach] with a set of On being placed for scheme switch [ZCSF-MhoX.EN]. You can also
prescribe resistive elements as shown on right and left side with settings [ZCSF-R.Reach] and
[ZCSF-R.Angle]; the resistive elements are applicable when you place a set of On for scheme
switch [ZCSF-MhoR.EN].
On the other hand, as shown in Figure 2.10-33, when you require placing an element in
the Quad characteristic in forward direction, you should place the reach of the ZCSF with
setting [ZCSF-X.Reach]. You can also place resistive elements, right side and left side in the
figure with setting [ZCSF-R.Reach] and [ZCSF-R.Angle]. The resistive elements are
symmetrical and the right side is placed across the origin from the left side. Additionally, you
can place a directional element—as shown with a bottom line—with setting [ZCSF-DR.Angle].
The same holds true for an element in the Mho characteristic in reverse direction (ZCSR) and
you can place the ZCSR with settings and scheme switches:
for the Mho,
for the Quad,
You should place a set of Block for setting [ZCSF-PSBBlk] because the operation of the ZCSF
should stop when the power swing is detected. You should place a set of Non for the setting
when you require the ZCSF operation keeping in the power swing detection.
You also should place a set of a set of Block for setting [ZCSR-VTFBlk] because the operation
of the ZCSR should stop when the VTF is detected. Conversely, you should place a set of Non
for the setting were you to require the ZCSR operation keeping in the VTF detection.
Make sure that the ZCSF does not supply the offset feature while the ZCSR supplies the offset
feature. The settings for the offset element are fixed at 7.5 Ω for 1 A rating or 1.5 Ω for 5 A
rating. The fix offset makes the ZCSR operate constantly even when the three-phase fault
appears close in the reverse side. However, the ZCSF blocks its operation in the three-phase
fault because the ZCSR runs together with the ZCSF. As a result, the command protection can
avoid improper operations.
[ZCSR-Mho.Reach],
R.Reach], [ZCSR-R.Angle], [ZCSR-MhoX.EN] and [ZCSR-MhoR.EN]
and
[ZCSR-X.Reach], [ZCSR-R.Reach], [ZCSRF-R.Angle], and [ZCSR-
DR.Angle].
- 125 -
[ZCSR-Mho.Angle],
6F2S1914 (0.49)
[ZCSR-X.Reach] [ZCSR-
GRL200 (Soft 033 & 037)