ABB RET670 Commissioning Manual page 166

Section 11
Testing functionality by secondary injection
160
ForwardX

V arctan
∠ =

ts
ForwardR

EQUATION14058 V1 EN
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 V
0 9 .
= × ×
ts t FwdZ ,
V
VT p ,
EQUATION14063 V1 EN
ForwardX

V arctan
∠ =

ts
ForwardR

EQUATION14058 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
I
CTs
It I 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 2, when trip conditions are
fulfilled.
59 33 .
  
arctan 82. . 14°
 =  =

8 19 .
  
0 1 .
0 9 11931 . 77 81 .
= × × =
13 8 .
59 33 .
  
arctan 82. . 14°
 =  =

8 19 .
  
1
= . 1 162 A
×
9000
1
1 162 . A
× =
9000
1MRK 504 165-UUS -
V
Transformer protection RET670 2.2 ANSI
Commissioning manual
(Equation 32)
(Equation 33)
(Equation 34)
(Equation 35)
(Equation 36)