ABB RET670 Commissioning Manual page 128

Section 10
Testing functionality by secondary injection
It
fs
EQUATION14062 V1 EN-US
I
∠
tfs
frequency of
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
It
fs
EQUATION14062 V1 EN-US
I
∠
tfs
frequency of
• 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:
•
•
•
•
•
122
I 1
CTs
I 10459
= × = ×
tf
I 9000
CTp
= 180º
I
= 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
I
= 50 Hz
50s
I 1
CTs
I 10459
= × = ×
tf
I 9000
CTp
= 0º
I
= 50 Hz
tf
VOLTAGE = 10.74 kV
CURRENT = 20918 A
R = 7.37%
X = 53.40%
ROTORANG = -3.09 rad
1 162 . A
=
0 1 .
77 81 . V
× =
13 8 .
59 33 .
 
82. . 14°
 =

8 19 .
 
= . 1 162 A
1 162 . A
=
1MRK 504 154-UUS B
(Equation 26)
GUID-9F0FE404-6D83-4308-9FE4-13259CE7D07A v1
GUID-700F4EA1-B7D9-4B77-829A-433BB67C8A01 v1
(Equation 27)
(Equation 28)
(Equation 29)
(Equation 30)
Commissioning manual