ABB Relion 650 Series Commissioning Manual page 81

1MRK 505 395-UEN Rev. G
I I
≤
t ovrl p ,
EQUATION14042 V1 EN-US
Reference is made to the numerical values of the example, explained in the "Setting guidelines" of
the Application Manual. A test current equal to 2.5 time the base current of the generator is chosen;
this choice is related to the selected test voltage that is applied while testing the point SE and RE.
2 5 .
I
= ×
t
EQUATION14043 V1 EN-US
The parameter ReachZ1 defines the boundary between zone 1 and zone 2; it is expressed in percent
of the parameter ForwardX. If the setting of ReachZ1 = 12%, then corresponding primary value of the
reactance is
ReachZ
X =
RZ 1
EQUATION14044 V1 EN-US
The calculation of the test voltage, that is related to ReachZ1, is based on the impedance Z
has imaginary part X
RRZ 1 =
EQUATION14045 V1 EN-US
The magnitude of the impedance Z
=
Z
RZ 1
EQUATION14046 V1 EN-US
Hence the reference voltage of the test of the boundary between zone 1 and zone 2 is
V Z
=
, 1
t RZ
EQUATION14047 V1 EN-US
If the test voltage is lower than V
test voltage is higher than V
Considering the resistances and reactances which are related to the settings (ForwardR, ForwardX)
and (ReverseR, ReverseX):
ForwardR
R =
FwdR
EQUATION14048 V1 EN-US
X =
FwdX
EQUATION14049 V1 EN-US
ReverseR
R =
RvsR
EQUATION14050 V1 EN-US
=
X
RvsX
EQUATION14051 V1 EN-US
Line differential protection RED650
Commissioning manual
I
9000
rp
I
4 36000
= × = × =
ovrl
I 1
rs
2 5 8367 20918 .
I
= × =
Base
1 ForwardX
× × ZBase
100 100
and real part R
RZ1
Re achZ 1 ForwardR
× × ZBase
100 100
+ = +
2 2 2
R X 0.009
RZ 1 RZ 1
0 069 20918 1435 .
I
× = × =
1
RZ t
, then the test is related to the zone 2.
t,RZ1
8 19 .
× ZBase =
100 100
ForwardX 59 33 .
× ZBase =
100 100
0 29 .
× ZBase = ×
100 100
ReverseR 29 6 .
× = ×
ZBase
100 100
© 2017 - 2022 Hitachi Energy. All rights reserved
A
A
12 59 33 .
= × × 0 9522 0 .
100 100
:
RZ1
12 8 19 .
= × × 0 9522 0 0 .
100 100
is:
RZ1
= W
2
0.068 0.069
V
(or in opposition), then the test is related to the zone 1; if the
t,RZ1
× 0 9522 0 078 . = . Ω
× 0 9522 0 565 . = . Ω
0 9522 0 003 . = . Ω
0 9522 0 282 . = . Ω
Testing functionality by secondary injection
= .0 0 68Ω
= . 0 0 9Ω
Section 9
(Equation 2)
(Equation 3)
(Equation 4)
that
RZ1
(Equation 5)
(Equation 6)
(Equation 7)
(Equation 8)
(Equation 9)
(Equation 10)
(Equation 11)
75