ABB RELION 670 Series Commissioning Manual page 107

1MRK 511 366-UUS A
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:
•
•
•
•
•
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):
Commissioning manual
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
0 1 .
77 81 . V
× =
13 8 .
59 33 .
 
82. . 14°
 =

8 19 .
 
= . 1 162 A
1 162 . A
=
Testing functionality by secondary injection
GUID-9F0FE404-6D83-4308-9FE4-13259CE7D07A v1
GUID-700F4EA1-B7D9-4B77-829A-433BB67C8A01 v1
(Equation 27)
(Equation 28)
(Equation 29)
(Equation 30)
GUID-028D7D67-B61A-4A7F-9978-4A0A41231B04 v1
Section 11
101