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Section 11
Testing functionality by secondary injection
116
•
VOLTAGE = 1.29 kV
•
CURRENT = 20918 A
•
R = 0.89%
•
X=6.42%
•
ROTORANG = -3.04 rad
Note that these values identify a point inside the lens characteristic in zone 1, that is
close to the boundary between zone 1 and zone 2. The START is issued, but no TRIP
is performed.
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, that
is a point in the plane R-X which 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
0 9
.
V
V
=
×
×
ts
t RZ
,
1
V
,
VT p
EQUATION14066 V1 EN
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
0 9
.
V
=
×
×
ts
t RZ
,
1
V
VT p
,
EQUATION14066 V1 EN
ForwardX
∠
=
V
arctan
ts
ForwardR
EQUATION14058 V1 EN
frequency of V
= 50 Hz
ts
0 1
.
0 9 1435
.
9 36
.
V
=
×
×
=
13 8
.
59 33
.
=
=
arctan
82. . 14°
8 19
.
0 1
.
0 9 1435
.
9 36
.
V
=
×
×
=
13 8
.
59 33
.
=
=
arctan
82. . 14°
8 19
.
1MRK 511 366-UUS -
(Equation 51)
(Equation 52)
(Equation 53)
(Equation 54)
Commissioning manual
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