Hitachi Relion RES670 Commissioning Manual page 102

Section 11
Testing functionality by secondary injection
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
Expected result: the protection function does not issue either start or trip.
The trajectory of the impedance traverses the lens characteristic in zone 2
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
EQUATION14063 V1 EN-US
∠
V
ts
EQUATION14058 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
∠I
50s
frequency of I
96
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
= 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 11931 .
× × = ×
t FwdZ ,
V
VT p ,
 
ForwardX
=  =
arctan  arctan
 
ForwardR
= 50 Hz
ts
I 1
CTs
I 10459
= × = ×
50
I 9000
CTp
= 0º
= 50 Hz
50s
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0 1 .
95 1 .
V
× =
13 8 .
 
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 .
= . 1 162 A
1MRK 511 409-UUS Rev. K
(Equation 23)
(Equation 24)
(Equation 25)
(Equation 26)
GUID-9F0FE404-6D83-4308-9FE4-13259CE7D07A v1
GUID-700F4EA1-B7D9-4B77-829A-433BB67C8A01 v1
(Equation 27)
(Equation 28)
(Equation 29)
Phasor measurement unit RES670
Commissioning manual