Introduction, Reference Power System
17
7UM62 Manual
C53000-G1176-C149-3
Technical Data of
the Reference
Power Systems
Generator:
S
N, G
= 5.27 MVA
U
N, G
= 6.3 kV
I
N, G
= 483 A
cos
ϕ
= 0.8
Current transformer:
I
N,prim
= 500 A;
I
N, sec
= 1 A
Toroidal current transformer I
N,prim
= 60 A;
I
N, sec
= 1 A
Voltage transformer:
U
N, prim
= (6.3/
√
3) kV
U
N, sec
= (100/
√
3) V
U
en
/3= (100/3) V
Transformer
Transformer:
S
N, T
= 5.3 MVA
U
prim
= 20 kV
U
sec
= 6.3 kV
u
sc
= 7 %
Neutral transformer
Resistor divider:
5 : 1
Motor
Motor:
U
N, M
= 6600 V
I
N, M
= 126 A
I
START
= 624 A (Startup current)
I
max
= 135 A (Admissible continuous stator current)
T
START
= 8,5 s
(Duration of startup with I
START
)
Current transformer:
I
N,prim
= 200 A;
I
N, sec
= 1 A
Further technical data is provided within the framework of the functional setting
specifications of the individual protective functions.
The calculated setting values are secondary setting values related to the device and
can be modified immediately by way of local operation.
The use of the DIGSI
®
4 operating program is recommended for complete
reparameterization. In this way, the user has the possibility to specify primary values
in addition to secondary settings. Within the framework of the 7UM62 the specification
of primary values is performed as a setting related to the nominal quantities of the
object to be protected (I
N, G
; U
N, G
; S
N, G
). This procedure has the advantage that
system-independent, typical settings of the protective functions can be pre-specified.
The data of the individual power system are updated in the power system data (see
sections 2.3 and 2.5) and the conversion to secondary values is executed via a mouse
click. All necessary conversion formula of the individual functions are stored in the
operating program.
6.3 kV
√
3
500 V
