General - Siemens SIPROTEC 7UT613 series Manual

2.1

General

7UT613/63x Manual
C53000-G1176-C160-2
A few seconds after the device is switched on, the default display appears on the LCD.
In the 7UT613/63x the measured values are displayed.
The function parameters, i.e. settings of function options, threshold values, etc., can
be entered via the front panel of the device or by means of a PC connected to the op-
erator or service interface of the device utilising DIGSI. Password No. 5 is required to
modify individual settings. Operation via DIGSI is described in the SIPROTEC system
description /1/ .
In this section you make the basic decisions regarding the proper interaction between
your substation, its measuring points, the analogue device connections and the
various protective functions of the device. Because of the comprehensive range of
features provided by the devices of the 7UT613/63x family, this section is quite exten-
sive. The device is portrayed here as completely as possible with regard to the system
to be protected together with its measuring points, i.e. the current and voltage trans-
formers, and what effects are to be expected of the protective functions of the device.
In a first step (Section 2.1.3) you should specify what type of plant component you
want to protect, since the scope of additional features offered depends on the type of
the main protected object. Moreover you have to decide which protective functions
you want to use, because not all of the functions integrated in the device are neces-
sary, useful or even possible for any relevant case of application.
In the next step (section 2.1.4), you describe the topology of the protected object. i.e.
the arrangement of the protected object, its sides (windings for transformers, sides for
generators/motors, ends for lines, feeders for busbars), and the measuring locations
which will provide the respective measured values.
After entering some General Power System Data (frequency, phase sequence), you
inform the device in section 2.1.4 of the properties of the main protected object. Object
properties include the ratings and (in the case of transformers) the starpoint treatment,
vector group and, where applicable, the auto-transformer winding.
Subsection 2.1.4 also deals with the CT data which must be set to ensure that the
currents acquired at the various measuring locations are evaluated in the device with
the correct scale factor.
The above information is sufficient to describe the protected object to the device's
main protection function, i.e. the differential protection. For the other protection
functions, you select in section 2.1.6 the measured values which will be processed by
you and in which way.
The same section 2.1.6 provides information with regard to how to set the circuit
breaker data, and finding out about setting groups and how to use them. Last but not
least, you can set general data which are not dependent on any protection functions.
2.1 General
33