ABB RELION REG670 Commissioning Manual page 139

1MRK 502 067-UEN B
I 2 5 .
= ×
t
EQUATION14043 V1 EN-US
The parameter
percent of the parameter
primary value of the reactance is
ReachZ
X
=
RZ 1
EQUATION14044 V1 EN-US
The calculation of the test voltage, that is related to
that 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
=
t RZ , 1
EQUATION14047 V1 EN-US
If the test voltage is lower than V
the test voltage is higher than V
Considering the resistances and reactances which are related to the settings (
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
and the voltages that are related to them:
V Z
=
t FwdZ ,
EQUATION14052 V1 EN-US
V Z
=
t RvsZ ,
EQUATION14053 V1 EN-US
Commissioning manual
I 2 5 8367 20918 .
= × =
Base
ReachZ1 defines the boundary between zone 1 and zone 2; it is expressed in
ForwardX . If the setting of ReachZ1 = 12% , then corresponding
1 ForwardX
ZBase
× ×
100 100
and real part R
RZ1
Re 1
achZ ForwardR
ZBase
× ×
100 100
2 + 2 = 2 +
R X 0.009
RZ 1 RZ 1
I 0 069 20918 1435 .
× = × =
RZ 1 t
8 19 .
ZBase
× =
100 100
ForwardX 59 33 .
ZBase
× =
100 100
0 29 .
ZBase
× = ×
100 100
ReverseR 29 6 .
ZBase
× = ×
100 100
2 2
I R X
× = +
FwdZ t FwdR FwdX
2 2
I R X
× = +
RvsZ t RvsR RvsX
A
12 59 33 .
0 9522 0 .
= × ×
100 100
ReachZ1 , is based on the impedance Z
:
RZ1
12 8 19 .
0 9522 0 0 .
= × ×
100 100
is:
RZ1
2 = W
0.068 0.069
V
(or in opposition), then the test is related to the zone 1; if
t,RZ1
, then the test is related to the zone 2.
t,RZ1
0 9522 0 078 . .
× = Ω
0 9522 0 565 . .
× = Ω
0 9522 0 003 . .
= Ω
0 9522 0 282 . .
= Ω
2 2
I 0 078 . 0 565 . 20918 0 570 0 20918 11931
× = + ×
t
2 2
I 0 003 . 0 282 . 20918 0 282 2 20918 5899
× = + ×
t
Testing functionality by secondary injection
.0 0 68Ω
=
. 0 0 9Ω
=
ForwardR ,
.
= × =
.
= × =
Section 12
(Equation 3)
(Equation 4)
RZ1
(Equation 5)
(Equation 6)
(Equation 7)
(Equation 8)
(Equation 9)
(Equation 10)
(Equation 11)
V
(Equation 12)
V
(Equation 13)
133