Siemens Siprotec 7UM611 User Manual

2 Functions
30
7UM61 Manual
C53000-G1176-C127-3
Technical Data of
the Reference
Power Systems
Transformer
Motor
Further technical data are 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.
For a complete reparametrization the operating program DIGSI
®
4 is recommended.
In this way, the user can specify primary values in addition to secondary settings. This
is done in the 7UM61 as a setting referred to the rated values of the object to be pro-
tected (e.g. I
N, G
; U
N, G
; S
N, G
). This procedure has the advantage that system-indepen-
dent, typical settings of the protective 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 conversion to secondary values is done by mouse clicking. All
necessary conversion formulas of the individual functions are stored in the operating
program.
Generator S
N, T
= 5.27 MVA
U
N, Gen
= 6.3 kV
I
NG
= 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
OS
= 20 kV
U = 6.3 kV
u
K
= 7 %
Zero point transformer:
CT=
Resistor divider: 5 : 1
Motor V
N
= 6600 V
I
N, M
= 126 A
I
StartCurr.
= 624 A (Starting current)
I
max
= 135 A (Permissible continuous stator cur-
rent)
T
STRT
= 8.5 s (Starting time at ISTRT)
Current transformer: I
N,prim
= 200 A; I
N, sec
= 1 A
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Siemens Siprotec 7UM611 Specifications

General

Brand	Siemens
Model	Siprotec 7UM611
Category	Relays
Language	English