ABB REG670 Commissioning Manual page 172

Section 13
Testing functionality by secondary injection
166
I
CTs
I I 10459
= × =
50 s 50
I
CTp
EQUATION14059 V1 EN-US
∠I
=0°
50s
frequency of I = 50 Hz
50s
I
It I CTs 10459
= × =
tf
fs
I
CTp
EQUATION14062 V1 EN-US
∠I
=0°
tfs
frequency of I = 50 Hz
tfs
• Check that the service values (VOLTAGE, CURRENT, R(%), X(%)) are
according to the injected quantities and that ROTORANG is close to 0 rad.
For this particular injection the service values are:
• VOLTAGE = 13.12 kV
• CURRENT = 20918 A
• R = 9.01%
• X = 65.27%
• ROTORANG = 0.04 rad
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
VT s ,
V V
1 1 .
= × ×
ts t FwdZ ,
V
VT p ,
EQUATION14057 V1 EN-US
ForwardX

V arctan
∠ =

ts
ForwardR

EQUATION14058 V1 EN-US
frequency of V = 50 Hz
ts
I =0 A
50s
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
1
= . 1 162 A
×
9000
1
1 162 . A
× =
9000
0 1 .
V
1 1 11931 . 95 1 .
= × × =
13 8 .
59 33 .
  
arctan 82. . 14°
 =  =

8 19 .
  
1MRK 502 073-UUS A
(Equation 19)
(Equation 20)
GUID-0B73C849-107D-40DC-80BB-31CD441BF69A v1
(Equation 21)
(Equation 22)
Commissioning manual