ABB RET670 Commissioning Manual page 127

1MRK 504 154-UUS B
•
•
•
•
•
Note that these values identify a point outside the lens characteristic, even if it is close to the
point RE. Neither START nor TRIP is issued.
Execution of the dynamic test
The test may be performed by using two states of a sequence tool that is a basic feature of test
sets.
• State 1: pre-test condition.
Steady voltage and current are applied in order to get a steady high impedance. This is a point
in the plane R-X that is far away from the lens characteristic. Define the following three-phase
symmetrical quantities (the phase angle is related to phase L1):
V
=
ts
EQUATION14057 V1 EN-US
V
∠
ts
EQUATION14058 V1 EN-US
frequency of V
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
=
ts
EQUATION14057 V1 EN-US
V
∠
ts
EQUATION14058 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
I
∠
50s
frequency of
Commissioning manual
VOLTAGE = 13.12 kV
CURRENT = 20918 A
R = 9.01%
X = 65.27%
ROTORANG = 0.04 rad
V
VT s
,
1 1 . V 1 1 11931 .
× × = ×
t FwdZ ,
V
VT p ,
ForwardX
 
arctan arctan
=  =

ForwardR
 
= 50 Hz
ts
V
VT s ,
1 1 . V 1 1 11931 .
× × = ×
t FwdZ ,
V
VT p
,
ForwardX
 
arctan arctan
=  =

ForwardR
 
= 50 Hz
ts
I 1
CTs
I 10459
= × = ×
50
I 9000
CTp
= 0º
I
= 50 Hz
50s
0 1 .
95 1 . V
× =
13 8 .
59 33 .
 
82. . 14°
 =

8 19 .
 
0 1 .
95 1 . V
× =
13 8 .
59 33 .
 
82. . 14°
 =

8 19 .
 
= . 1 162 A
Testing functionality by secondary injection
GUID-0B73C849-107D-40DC-80BB-31CD441BF69A v1
(Equation 21)
(Equation 22)
(Equation 23)
(Equation 24)
(Equation 25)
Section 10
121