Hitachi Relion 670 Series Commissioning Manual page 148

Section 11
Testing functionality by secondary injection
V
=
ts
EQUATION14069 V1 EN-US
Ð
V
EQUATION14068 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
∠I
50s
frequency of I
It
fs
EQUATION14062 V1 EN-US
∠I
tfs
frequency of I
• Check that the service values (VOLTAGE, CURRENT, R(%), X(%)) are according to the injected
quantities and that ROTORANG is close to 0 rad. For this particular injection the service values are:
•
•
•
•
•
Note that these values identify a point outside the lens characteristic, even if it is close to the point
SE. Neither START nor TRIP is issued.
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
EQUATION14069 V1 EN-US
Ð
V
EQUATION14068 V1 EN-US
frequency of V
I
50s
142
V
VT s ,
1 1 . 1 1 5899 .
V
× × = ×
,
t RvsZ
V
VT p ,
æ ö
ReverseX
= ç ÷ -
arctan 180
è ø
ts
ReverseR
= 50 Hz
ts
I 1
CTs
I 10459
= × = ×
50
I 9000
CTp
= 0º
= 50 Hz
50s
1
I
I CTs 10459
= × = ×
tf
I 9000
CTp
= 0º
= 50 Hz
tf
VOLTAGE= 6.49 kV
CURRENT= 20918 A
R= –0.32%
X=–32.57%
ROTORANG= 0.08 rad
V
VT s ,
1 1 . V 1 1 5899 .
× × = ×
t RvsZ ,
V
VT p ,
æ ö
ReverseX
= ç ÷ -
arctan 180
è ø
ts
ReverseR
= 50 Hz
ts
= 0 A
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0 1 .
47 02 .
V
× =
13 8 .
æ ö
29.60
° = ç ÷ -
arctan 180
è ø
0.29
= . 1 162 A
1 162 . A
=
0 1 .
47 02 . V
× =
13 8 .
æ ö
29.60
° = ç ÷ -
arctan 180
è ø
0.29
1MRK506371-UUS Rev. M
° = - °
90.56
GUID-31EF4F76-8FC8-4952-896C-B3A8A5FD635A v1
° = - °
90.56
Line distance protection REL670
Commissioning manual
(Equation 67)
(Equation 68)
(Equation 69)
(Equation 70)
(Equation 71)
(Equation 72)