1 Introduction
22
7UM61 Manual
C53000-G1176-C127-3
The 7UM61 device is usable for further applications such as
• Backup protection, since in addition to overcurrent protection, a large variety of pro-
tection functions allow, for example, monitoring of voltage and frequency load.
• Protection of synchronous and asynchronous motors.
• Mains Decoupling Device
Messages and Mea-
sured Values; Re-
cording of Event
and Fault Data
The operating messages provide information about conditions in the power system
and the device itself. Measurement quantities and resulting computed values can be
displayed locally and communicated via the serial interfaces.
Annunciations of the devices can be presented by LEDs on the front panel (allocat-
able), processed further externally using output contacts (allocatable), combined with
user-definable logic functions and/or output via serial interfaces (see Communication
below).
During a generator or network fault (fault in the power system), important events and
state changes are stored in a fault annunciation buffer. The instantaneous or rms mea-
sured values during the fault are also stored in the device and are subsequently avail-
able for fault analysis.
Communication For communication with external operator, control and storage systems, serial inter-
faces are available.
Operator Interface
on the Front Panel
A 9-pin DSUB socket on the front panel is used for local communication with a person-
al computer. By means of the SIPROTEC
®
operating software DIGSI
®
, all operational
and evaluation tasks can be executed via this user
interface, such as specifying and
modifying configuration parameters and settings, configuring user-specific logic func-
tions, retrieving operational and fault messages and measured values, readout and
display of fault recordings, querying of devices statuses and measured values.
Rear Panel Interfac-
es
Depending on the individual ordering variant, additional interfaces are located on the
rear panel of the device. These interfaces allow an extensive communication with
other digital operating, control and memory components to be set up:
The service
interface can be operated through data lines. Also, a modem can be con-
nected to this interface. For this reason, remote operation is possible via PC and the
DIGSI
®
4 operating software, e.g. to operate several devices from a central PC.
The system
interface is used for central communication between the device and a
control centre. The data cables or fibre optic cables can be used. Several standard
protocols are available for data transmission:
• IEC 60 870–5–103
Integration of the devices into the substation automation systems SINAUT
®
LSA
and SICAM
®
can also be done with this profile.
• Profibus DP
This protocol of automation technology allows transmission of indications and mea-
sured values.
• Modbus ASCII/RTU
This protocol of automation technology allows transmission of indications and mea-
sured values.
•DNP 3.0
This protocol of automation technology allows transmission of indications and mea-
sured values.
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