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

1MRK 504 165-UUS -
11.4.12.4
Transformer protection RET670 2.2 ANSI
Commissioning manual
I
CTs
I I 10459
= × =
50 s 50
I
CTp
EQUATION14059 V1 EN
∠I
= 0º
50s
frequency of I = 50 Hz
50s
I
It I CTs 10459
= × =
tf
fs
I
CTp
EQUATION14062 V1 EN
∠I
= 180º
tfs
frequency of I = 49.5 Hz
tfs
Expected result: start of the protection function and trip in zone 1 when trip conditions
are fulfilled.
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
æ
ReverseX
Ð = ç
V arctan
è
ts
ReverseR
EQUATION14068 V1 EN
frequency of V = 50 Hz
ts
I
CTs
I I 10459
= × =
50 s 50
I
CTp
EQUATION14059 V1 EN
∠I
= 0º
50s
frequency of I = 50 Hz
50s
Testing functionality by secondary injection
1
= . 1 162 A
×
9000
1
1 162 . A
× =
9000
, 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
Section 11
V
ö
÷ - ° = - °
180 90.56
ø
(Equation 55)
(Equation 56)
(Equation 57)
(Equation 58)
(Equation 59)
165