Siemens SIPROTEC 7UT613 series Manual page 70

2 Functions
Object Data with
Busbars (1-phase
Connection) with
up to 6 or 9 or 12
Feeders
Object Data for
Further Protected
Objects
70
These busbar data are only required if the device is used for single-phase busbar dif-
ferential protection. When configuring the scope of functions (see Scope of Functions,
address 105), the following must have been set: PROT. OBJECT = 1ph Busbar. In
cases other than that, these settings are not available. 7UT613 and 7UT633 allow up
to 9, 7UT635 up to 12 feeders.
With address 370 UN BUSBAR you inform the device of the primary rated voltage
(phase-to-phase). This setting has no effect on the protective functions but influences
the displays of the operational measured values.
The feeders of a busbar may be rated for different currents. For instance, an overhead
line may be able to carry higher load than a cable feeder or a transformer feeder. You
can define a primary rated current for each feeder of the protected object; this current
will be the reference for all referred values. These ratings may differ from the rated cur-
rents of the associated current transformers which latter will be entered at a later stage
(current transformer data). Figure 2-12 shows the example of a busbar with 3 feeders.
Additionally, a rated current for the entire busbar as the main protected object can be
determined. The currents of all measuring locations assigned to the main object are
converted such that the values of the differential protection are referred to this rated
current of the main protected object, here the busbar. If the current rating of the busbar
is known, set this rated current in address 371 I PRIMARY OP.. If no rated current
of the busbar is defined, you should select the highest of the rated currents of the sides
(= feeders). In Figure 2-12, the rated object current (busbar current) would be 1000 A.
Under address 381 I PRIMARY OP 1, set the rated primary current of feeder 1.
The same considerations apply for the further feeders:
• Address 382 I PRIMARY OP 2 for feeder 2,
• Address 383 I PRIMARY OP 3 for feeder 3,
• Address 384 I PRIMARY OP 4 for feeder 4,
• Address 385 I PRIMARY OP 5 for feeder 5,
• Address 386 I PRIMARY OP 6 for feeder 6,
• Address 387 I PRIMARY OP 7 for feeder 7,
• Address 388 I PRIMARY OP 8 for feeder 8,
• Address 389 I PRIMARY OP 9 for feeder 9,
• Address 390 I PRIMARY OP 10 for feeder 10,
• Address 391 I PRIMARY OP 11 for feeder 11,
• Address 392 I PRIMARY OP 12 for feeder 12.
In 7UT613 and 7UT633 addresses 390 to 392 are omitted, since these versions only
permit 9 feeders.
If one 7UT613/63x is used per phase, set the same rated current and voltage of a
feeder for all three devices. For the identification of the phases for fault annunciations
and measured values each device is to be informed on the phase to which it is as-
signed. This is to be set in address 396 PHASE SELECTION.
The object data described in the previous paragraphs relate to the main protected
object whose sides and measuring locations have been assigned according to section
2.1.4.1. If you have defined further protected objects in your topology, a number of
non-assigned measuring locations will be left. The rated values of these are requested
now.
The considerations concerning rated voltages and current are the same as for the
main protected object. Only those of the following addresses will appear during setting
7UT613/63x Manual
C53000-G1176-C160-2