Hitachi Relion 670 Series Commissioning Manual page 141

1MRK506371-UUS Rev. M
∠
V
ts
EQUATION14058 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 3.14 rad. For this particular injection the service values
are:
•
•
•
•
•
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
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
EQUATION14063 V1 EN-US
∠
V
ts
EQUATION14058 V1 EN-US
frequency of V
I
50s
I = 0 A
tfs
• State 2: main test step.
Define the following three-phase symmetrical quantities (the phase angle is related to phase L1):
Line distance protection REL670
Commissioning manual
 
ForwardX
=  =
arctan arctan

 
ForwardR
= 50 Hz
ts
1
I
CTs 10459
I
= × = ×
50
I 9000
CTp
= 0º
= 50 Hz
50s
I 1
CTs
I 10459
= × = ×
tf
9000
I
CTp
= 0º
= 50 Hz
tf
VOLTAGE = 10.74 kV
CURRENT = 20918 A
R = 7.37%
X = 53.40%
ROTORANG = -3.09 rad
V
VT s ,
0 9 . V 0 9 11931 .
× × = ×
t FwdZ ,
V
VT p ,
 
ForwardX
=  =
arctan  arctan
 
ForwardR
= 50 Hz
ts
= 0 A
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 
59 33 .
 =
82. . 14°

 
8 19 .
= . 1 162
A
1 162 . A
=
0 1 .
77 81 . V
× =
13 8 .
 
59 33 .
 =
 82. . 14°
 
8 19 .
Section 11
Testing functionality by secondary injection
(Equation 28)
(Equation 29)
(Equation 30)
GUID-028D7D67-B61A-4A7F-9978-4A0A41231B04 v1
(Equation 31)
(Equation 32)
135