ABB Relion 670 series - Page 157

∠ =






=






=V
ForwardX
ForwardR
ts
arctan arctan
.
.
59 33
8 19
82..14°
EQUATION14058 V1 EN-US (Equation 32)
frequency of V
ts
= 50 Hz
I I
I
I
A
s
CTs
CTp
50 50
10459
1
9000
1 162= × = × = .
EQUATION14059 V1 EN-US (Equation 33)
∠I
50s
= 0º
frequency of I
50s
= 50 Hz
It I
I
I
A
fs
CTs
CTp
tf= × = × =10459
1
9000
1 162.
EQUATION14062 V1 EN-US (Equation 34)
∠I
tfs
= 0º
frequency of I
tf
= 50 Hz
• Check that the service values (VOLTAGE, CURRENT, R(%), X(%) ) are according to the injected
quantities and that ROTORANG is close to 3.14 rad. For this particular injection the service values
are:
• VOLTAGE = 10.74 kV
• CURRENT = 20918 A
• R = 7.37%
• X = 53.40%
• ROTORANG = -3.09 rad
Note that these values identify a point inside the lens characteristic, in the zone 2, that is close to the
point RE. The START is issued, but no TRIP is performed.
Execution of the dynamic test
GUID-028D7D67-B61A-4A7F-9978-4A0A41231B04 v1
The test may be performed by using two states of a sequence tool that is a basic feature of test sets.
• State 1: pre-test condition.
Steady voltage and current are applied in order to get a steady high impedance, that is, a point in
the plane R-X which is far away from the lens characteristic. Define the following three-phase
symmetrical quantities (the phase angle is related to phase L1):
V V
V
V
V
ts t FwdZ
VT s
VT p
= × × = × × =0 9 0 9 11931
0 1
13 8
77 81. .
.
.
.
,
,
,
EQUATION14063 V1 EN-US (Equation 35)
∠ =






=






=V
ForwardX
ForwardR
ts
arctan arctan
.
.
59 33
8 19
82..14°
EQUATION14058 V1 EN-US (Equation 36)
frequency of V
ts
= 50 Hz
I
50s
= 0 A
I
tfs
= 0 A
• State 2: main test step.
Define the following three-phase symmetrical quantities (the phase angle is related to phase L1):
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 151
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved