Functions
2.1 Introduction, Reference Power System
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
38
Technical Data of the Reference Power Systems
Transformer
Motor
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 immedi-
ately by way of local operation.
The use of the DIGSI operating program is recommended for a complete reparameterization. In this way, the
user can specify primary values in addition to secondary settings. Within the framework of the 7UM62 the spec-
ification of primary values is performed as a setting related to the nominal quantities of the object to be protect-
ed (I
N, G
; U
N, G
; S
N, G
). This procedure has the advantage that system-independent, typical settings of the pro-
tective functions can be pre-specified. The data of the individual power system are updated in the Power
System Data 1 or Power System Data 2 and the conversion to secondary values is executed via a mouse
click. All necessary conversion formulas of the individual functions are stored in the operating program.
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 c.t.: 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: S
N, T
= 5.3 MVA
U
prim
= 20 kV
U = 6.3 kV
u
SC
= 7 %
Zero point transformer:
ü =
Resistor divider: 5 : 1
Motor U
N, M
= 6600 V
I
N, M
= 126 A
I
START
= 624 A (Starting current)
I
max
= 135 A (Permissible continuous stator current)
T
START
= 8.5 s (Starting time time at I
START
)
Current transformer: I
N,prim
= 200 A; I
N, sec
= 1 A
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