ABB RET670 Commissioning Manual page 165

1MRK 504 165-UEN A
Transformer protection RET670 2.2 IEC
Commissioning manual
Testing functionality by secondary injection
ForwardX

V arctan
∠ =

ts
ForwardR

EQUATION14058 V1 EN-US
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 RZ , 1
V
VT p ,
EQUATION14066 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 1 when trip
conditions are fulfilled.
59 33 .
  
arctan 82. . 14°
 =  =

8 19 .
  
0 1 .
0 9 1435 . 9 36 . V
= × × =
13 8 .
59 33 .
  
arctan 82. . 14°
 =  =

8 19 .
  
1
= . 1 162 A
×
9000
1
1 162 . A
× =
9000
Section 11
(Equation 52)
(Equation 53)
(Equation 54)
(Equation 55)
(Equation 56)
159