Hitachi Relion 670 Series Commissioning Manual page 139

1MRK506371-UUS Rev. M
11.4.12.2 Test of point RE (R
The trajectory of the impedance does not enter the lens characteristic.
Preliminary steady state test at 50 Hz
• Go to Main menu /Test /Function status /Impedance protection /OutOfStep(78,Ucos) /
OOSPPAM(78,Ucos):1 /Outputs to check the available service values of the function block
OOSPPAM.
• Apply the following three-phase symmetrical quantities (the phase angle is related to phase L1):
V
=
ts
EQUATION14057 V1 EN-US
∠
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 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 RE.
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. This is a point in
the plane R-X that is far away from the lens characteristic. Define the following three-phase
symmetrical quantities (the phase angle is related to phase L1):
Line distance protection REL670
Commissioning manual
, X
FwdR
V
VT s ,
1 1 . 1 1 11931 .
V
× × = ×
t FwdZ ,
V
VT p ,
 
ForwardX
=  =
arctan arctan

 
ForwardR
= 50 Hz
ts
1
I
CTs
I 10459
= × = ×
50
9000
I
CTp
=0°
= 50 Hz
50s
I 1
CTs
I 10459
= tf × = ×
I 9000
CTp
=0°
= 50 Hz
tfs
VOLTAGE = 13.12 kV
CURRENT = 20918 A
R = 9.01%
X = 65.27%
ROTORANG = 0.04 rad
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)
FwdX
0 1 .
95 1 .
V
× =
13 8 .
 
59 33 .
 =
82. . 14°

 
8 19 .
= . 1 162 A
1 162 . A
=
Section 11
Testing functionality by secondary injection
GUID-911D370F-8767-4D6C-9621-8663DD26006C v1
GUID-5C5E9BEB-AA60-474E-ACEC-B972ACFE6FA2 v1
GUID-8F95CCCC-3282-48E8-9F5E-3F3E77CCCAAE v1
(Equation 17)
(Equation 18)
(Equation 19)
(Equation 20)
GUID-0B73C849-107D-40DC-80BB-31CD441BF69A v1
133