Toshiba GR 200 Series, Instruction Manual

Page: 108 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 87 -
2.1.10
ZS/ZG test
(i)
ZS-Test.CTRL
When the user wishes to have the relay characteristic test without the influence of the Zmin
feature,
On
should be set for the setting [
ZS-Test.CTRL
] not to operate the Zmin feature.
(ii)
ZS-Offset.CTRL
As shown in Figure 2.1-60, if the offset characteristic is required during the test regardless of
the fault occurrences, the user should set
Offset
for the setting [
ZS-Offset.CTRL
]. Contrarily,
if the offset one is not required, set
Non-Offset
for the setting. Note that
Normal
shall be set
for the setting after the test.
(iii)
ZS-Test.XAngle, ZG-Test.XAngle
Figure 2.1-60 illustrates that the ZS element with knee point, which can be ruled with the
angles made with θ1 and θ2. Should
On-Adapt
be set for setting [
Z*S-X.GrAngleEN
], the knee
slope can be made with θ1, which will be computed internally using a current difference
measured before and after the fault. For the test, if a fixed ‘θ1’ is preferred during the
On-
Adapt
has been set, the user can take the fixed ‘θ1’ by the setting [
ZS-Test.XAngle
]=
On
. Note
that fixed ‘θ1’ will be taken from setting [
ZSF-X.GrAngle1
] during the test.
Similarly, the user can have the take the [
ZG-Test.XAngle
] for the ZG element.
Knee point
Resistance(R)
Z*S-X.Reach
Z*S-R.Reach
Offset char,
Reactance(X)
θ
1
θ
1=setting [
ZSF-X.GrAngle1
]
θ
2=setting [
ZSF-X.GrAngle2
]
θ
2
Figure 2.1-60 Example of ZS element with knee point