ABB RELION RET670, Commissioning Manual, Page: 167 / 328

11.4.12.3 Test of the boundary between zone 1 and zone 2, which is defined by the
parameter ReachZ1
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 V
V
V
V
ts t RZ
VT s
VT p
= × × = × × =
1 1 1 1 1435
0 1
13 8
11 44
1
. .
.
.
.
,
,
,
EQUATION14065 V1 EN
(Equation 37)
∠ =





 =





 =
V
ForwardX
ForwardR
ts
arctan arctan
.
.
59 33
8 19
82..14
°
EQUATION14058 V1 EN
(Equation 38)
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 39)
∠
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 40)
∠
I
tfs
= 0º
frequency of I
tfs
= 50 Hz
• 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 = 1.58 kV
• CURRENT = 20918 A
• R = 1.08%
• X = 7.85%
• ROTORANG = -3.04 rad
1MRK 504 165-UUS -
Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 161
Commissioning manual