Hitachi RED670 Commissioning Manual page 149

1MRK 505 378-UEN Rev. K
V
ts
EQUATION14065 V1 EN-US
∠
V
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):
V
ts
EQUATION14065 V1 EN-US
∠
V
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
Expected result: start of the protection function and trip in zone 2 when trip conditions are
fulfilled.
The trajectory of the impedance traverses the lens characteristic in zone 1
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
EQUATION14066 V1 EN-US
Line differential protection RED670
Commissioning manual
V
VT s ,
1 1 . 1 1 1435 .
V
= × × = ×
t RZ , 1
V
,
VT p
 
ForwardX
=  =
arctan 
ts
 
ForwardR
= 50 Hz.
t
= 0 A
V
VT s ,
1 1 . V 1 1 1435 .
= × × = ×
t RZ , 1
V
VT p ,
 
ForwardX
=  =
arctan

ts
 
ForwardR
= 50 Hz
t
I 1
CTs
I 10459
= × = ×
50
I 9000
CTp
= 0º
= 50 Hz
50s
I 1
CTs
I 10459
= × = ×
tf
I 9000
CTp
= 180º
= 49.5 Hz
tfs
V
VT s ,
0 9 . V 0 9 1435 .
= × × = ×
t RZ , 1
V
VT p ,
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0 1 .
11 44 .
V
× =
13 8 .
 
59 33 .
 =
arctan  82. . 14°
 
8 19 .
0 1 .
11 44 . V
× =
13 8 .
 
59 33 .
 =
arctan 82. . 14°

 
8 19 .
= . 1 162 A
1 162 . A
=
0 1 .
9 36 . V
× =
13 8 .
Section 11
Testing functionality by secondary injection
(Equation 44)
(Equation 45)
(Equation 46)
(Equation 47)
(Equation 48)
(Equation 49)
GUID-12F82DD8-A4CE-48C9-944B-0CF3B3F6C9F9 v1
GUID-AA953F5F-2389-4F05-8BBD-D8DC9AF3B0E4 v1
(Equation 50)
143