Test Of The Boundary Between Zone 1 And Zone 2, Which Is Defined By The Parameter Reachz1 - ABB RET670 Commissioning Manual

1MRK 504 165-UEN A
11.4.12.3
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
frequency of V = 50 Hz
ts
I = 0 A
50s
I = 0 A
tfs
• State 2: main test step.
Define the following three-phase symmetrical quantities (the phase angle is
related to phase L1):
V
VT s
V 0 9 . V
= × ×
ts t FwdZ ,
V
VT p
EQUATION14063 V1 EN-US
ForwardX

V arctan
∠ =

ts
ForwardR

EQUATION14058 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
= 180º
tfs
frequency of I = 49.5 Hz
tfs
Expected result: start of the protection function and trip in zone 2, when trip
conditions are fulfilled.
Test of the boundary between zone 1 and zone 2, which is defined
ReachZ1
by the parameter
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):
0 1 .
,
0 9 11931 . 77 81
= × × =
13 8 .
,
59 33 .
  
arctan
 =  =

8 19 .
  
1
= . 1 162 A
×
9000
1
1 162 . A
× =
9000
Section 11
. V
82. . 14°
GUID-BE180E07-7D4B-4842-81FB-244DE8897430 v1
GUID-17F6AC8D-1F57-4245-A61D-776D469DD153 v1
GUID-3D42E43D-873E-4271-9AAF-3B2789FF3B17 v1
(Equation 33)
(Equation 34)
(Equation 35)
(Equation 36)
155