ABB RELION RET670, Commissioning Manual, Page: 171 / 328

I I
I
I
A
s
CTs
CTp
50 50
10459
1
9000
1 162
= × = × =
.
EQUATION14059 V1 EN
(Equation 55)
∠
I
50s
= 0º
frequency of I
50s
= 50 Hz
It I
I
I
A
fs
CTs
CTp
tf
= × = × =
10459
1
9000
1 162 .
EQUATION14062 V1 EN
(Equation 56)
∠
I
tfs
= 180º
frequency of I
tfs
= 49.5 Hz
Expected result: start of the protection function and trip in zone 1 when trip conditions
are fulfilled.
11.4.12.4 Test of the point SE (R
RvsR
, X
RvsX
)
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 V
V
V
V
ts t RvsZ
VT s
VT p
= × × = × × =
0 9 0 9 5899
0 1
13 8
38 47 . .
.
.
.
,
,
,
EQUATION14067 V1 EN
(Equation 57)
29.60
arctan 180 arctan 180 90.56
0.29
ts
ReverseX
V
ReverseR
Ð = - ° = - ° = - °
æ ö æ ö
ç ÷ ç ÷
è ø è ø
EQUATION14068 V1 EN
(Equation 58)
frequency of V
ts
= 50 Hz
I I
I
I
A
s
CTs
CTp
50 50
10459
1
9000
1 162
= × = × =
.
EQUATION14059 V1 EN
(Equation 59)
∠
I
50s
= 0º
frequency of I
50s
= 50 Hz
1MRK 504 165-UUS -
Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 165
Commissioning manual