Test Of The Point Se (R Rvsr , X Rvsx ) - ABB RET670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.12.4
160
Test of the point SE (R
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
VT s ,
V 0 9 . V
= × ×
ts t RvsZ
,
V
VT p ,
EQUATION14067 V1 EN-US
æ
ReverseX
Ð =
ç
V arctan
è
ts
ReverseR
EQUATION14068 V1 EN-US
frequency of V = 50 Hz
ts
I
CTs
I I 10459
= × =
50 s 50
I
CTp
EQUATION14059 V1 EN-US
∠I
= 0º
50s
frequency of I = 50 Hz
50s
I
CTs
It I 10459
= × =
tf
fs
I
CTp
EQUATION14062 V1 EN-US
∠I
= 0º
tfs
frequency of I = 50 Hz
tf
• 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:
• VOLTAGE = 5.31 kV
• CURRENT = 20918 A
• R = -0.26%
• X = -26.65%
• ROTORANG = -3.06 rad
Note that these values identify a point inside the lens characteristic in zone 1
that is close to the point SE. The START is issued, but no TRIP is performed.
, X )
RvsR RvsX
0 1 .
0 9 5899 . 38 47 .
= × × =
13 8 .
ö æ
29.60
- ° =
÷ ç
180 arctan
ø è
0.29
1
= . 1 162 A
×
9000
1
1 162 . A
× =
9000
1MRK 504 165-UEN A
GUID-335F54E6-52DE-4BF1-A34B-0C2DB8059CC1 v1
GUID-2DD20D2E-6188-4631-A584-5E68B212E011 v1
GUID-7BCF3D7B-1B84-46D4-B9E3-066894A878E8 v1
V
ö
- ° = - °
÷
180 90.56
ø
Transformer protection RET670 2.2 IEC
Commissioning manual
(Equation 57)
(Equation 58)
(Equation 59)
(Equation 60)