Table of Contents
Advertisement
1MRK 511 366-UUS -
Commissioning manual
I
CTs
I
I
10459
=
×
=
50
s
50
I
CTp
EQUATION14059 V1 EN
∠I
=0°
50s
frequency of I
= 50 Hz
50s
I
It
I
CTs
10459
=
×
=
tf
fs
I
CTp
EQUATION14062 V1 EN
∠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
1 1
.
V
=
×
×
ts
t FwdZ
,
V
VT p
,
EQUATION14057 V1 EN
ForwardX
∠
=
V
arctan
ts
ForwardR
EQUATION14058 V1 EN
frequency of V
= 50 Hz
ts
I
=0 A
50s
Testing functionality by secondary injection
1
= .
1 162
A
×
9000
1
1 162
.
A
×
=
9000
0 1
.
1 1 11931
.
95 1
.
V
=
×
×
=
13 8
.
59 33
.
=
=
arctan
82. . 14°
8 19
.
Section 11
(Equation 19)
(Equation 20)
(Equation 21)
(Equation 22)
109
Advertisement
Table of Contents
