ABB RED670 - Page 161

∠ =






=






=V
ForwardX
ForwardR
ts
arctan arctan
.
.
59 33
8 19
82..14°
EQUATION14058 V1 EN-US (Equation 21)
frequency of V
ts
= 50 Hz
I I
I
I
A
s
CTs
CTp
50 50
10459
1
9000
1 162= × = × = .
EQUATION14059 V1 EN-US (Equation 22)
∠I
50s
=0°
frequency of I
50s
= 50 Hz
It I
I
I
A
fs
CTs
CTp
tf= × = × =10459
1
9000
1 162.
EQUATION14062 V1 EN-US (Equation 23)
∠I
tfs
=0°
frequency of I
tfs
= 50 Hz
• 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
GUID-0B73C849-107D-40DC-80BB-31CD441BF69A v1
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 V
V
V
V
ts t FwdZ
VT s
VT p
= × × = × × =1 1 1 1 11931
0 1
13 8
95 1. .
.
.
.
,
,
,
EQUATION14057 V1 EN-US (Equation 24)
∠ =






=






=V
ForwardX
ForwardR
ts
arctan arctan
.
.
59 33
8 19
82..14°
EQUATION14058 V1 EN-US (Equation 25)
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 155
Commissioning manual