ABB Relion 670 Series Commissioning Manual page 158

Section 11
Testing functionality by secondary injection
V
ts
EQUATION14067 V1 EN-US
Ð
V
EQUATION14068 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
I
∠
50s
frequency of
It
fs
EQUATION14062 V1 EN-US
I
∠
tfs
frequency of
• 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:
•
•
•
•
•
Note that these values identify a point inside the lens characteristic in zone 1 that is close
to the point SE. The START is issued, but no TRIP is performed.
Execution of the dynamic test
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
ts
EQUATION14067 V1 EN-US
Ð
V
EQUATION14068 V1 EN-US
frequency of V
I
50s
I
tfs
152
V
VT s ,
0 9 . 0 9 5899 .
V
= × × = ×
t RvsZ ,
V
,
VT p
æ ö
ReverseX
= -
ç ÷
arctan
è ø
ts
ReverseR
= 50 Hz
ts
1
I
CTs
I 10459
= × = ×
50
9000
I
CTp
= 0º
I
= 50 Hz
50s
1
I
CTs
I 10459
= × = ×
tf
I 9000
CTp
= 0º
I
= 50 Hz
tf
VOLTAGE = 5.31 kV
CURRENT = 20918 A
R = -0.26%
X = -26.65%
ROTORANG = -3.06 rad
V
,
VT s
0 9 . 0 9 5899 .
V
= × × = ×
,
t RvsZ
V
VT p ,
æ ö
ReverseX
= ç ÷ -
arctan
è ø
ts
ReverseR
= 50 Hz
ts
= 0 A
= 0 A
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0 1 .
38 47 .
V
× =
13 8 .
æ ö
29.60
° = -
ç ÷
180 arctan 180
è ø
0.29
= . 1 162 A
1 162 . A
=
0 1 .
38 47 .
V
× =
13 8 .
æ ö
29.60
° = ç ÷ -
180 arctan 180
è ø
0.29
1MRK 504 165-UEN E
° = - °
90.56
GUID-FF6DCD5B-96AA-4255-8740-B85C8C7148F5 v1
° = - °
90.56
Transformer protection RET670
Commissioning manual
(Equation 61)
(Equation 62)
(Equation 63)
(Equation 64)
(Equation 65)
(Equation 66)