Initial Inspections 3
4.3 Information Retrieval
A SIPROTEC® 4 device has an abundance of information that can be used to obtain an overview of the present and past operating conditions of the device and the portion of the power system being protected or controlled by the device. The information is represented in separate groups:
q Annunciation,
q Measurements,
q Waveform capture.
Remote If the device is integrated into a process control system, then information transfer can take place, via a connection to the system interface of the SIPROTEC® 4 device, to:
q SCADA, or
q substation controller device, e.g. SICAM SC
Local On site, the HMI of the SIPROTEC® 4 device can be used to retrieve information.
DIGSI®4 Information retrieval is simple and fast when DIGSI®4 is used. For local use, connect a PC to the operating serial interface at the front of the SIPROTEC® 4 device. For re-mote retrieval of information, communication occurs via a modem connected to the service serial interface. DIGSI®4 must operate in the Online mode to obtain informa-tion from the device.
4.3.1 Annunciations
The scope of the indication (messages) that are given under Annunciation is automat-ically determined when settings for the basis configuration of functions are applied to the SIPROTEC® 4 device.
The messages are divided into the following categories, and displayed using DIGSI®4 or the HMI of the device:
q Event Log: Operational messages independent of network faults, e.g. messages about control operations or monitoring functions;
q Trip Log: Fault messages;
q Sensitive Ground Fault Log: Ground fault messages for devices with sensitive ground fault detection;
q General Interrogation: Display of present condition messages;
q Spontaneous Annunciation: Continuous display of important messages from the device; e.g., after faults, control operations, etc. This feature is very helpful during commissioning.
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Figure 4-3 DIGSI®4, Annunciation
Display in DIGSI®4 To view the indications in the DIGSI®4 Tool 2QOLQH:
• Select $QQXQFLDWLRQ in the navigation window.
All annunciation groups are shown in the data window.
• Double click on an annunciation group in the data window, such as (YHQW/RJ.
• Select 0DLQ0HQX → $QQXQFLDWLRQ → e.g. (YHQW/RJ or 7ULS/RJ.
Figure 4-4 SIPROTEC®4, Device Display of Operating Messages in the Event Log, Exam-ple
Figure 4-5 SIPROTEC® 4, Device Display, Trip Log and Ground Fault Messages, Example
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4.3.2 Measurements
The measured values that are registered are divided into the following categories for display in DIGSI®4 or on the HMI of the device:
q Primary values, based on the measured secondary values and the settings entered for the current transformers and voltage transformers.
q Secondary values, which are the measured values or are derived from the mea-sured values.
q Percentage values, relative to nominal ratings.
q Other values including thermal values and user-defined values.
q Statistics values.
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Figure 4-6 DIGSI®4 Measured value display, Example
Display in DIGSI®4 To display the measured values using the DIGSI®4 2QOLQH control panel:
• Select 0HDVXUHPHQW in the navigation window. The measured value groups ap-pear in the data window.
• Double click on a group, for example 3ULPDU\9DOXHV.
• Double click on the next item in the data window, 2SHUDWLRQDOYDOXHVSUL
PDU\ in the example. The date and time appear.
• Double click on the date and time, and the measured values appear.
Display on the Device
To display the measured values in the HMI of the SIPROTEC® 4 device:
• Select 0DLQ0HQX → 0HDVXUHPHQW →
e.g. 2SHUDWLRQSUL² or 2SHUDWLRQVHF².
Figure 4-7 SIPROTEC® 4, Device Display of Measured Values, Example 0($685(0(17
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4.3.3 Waveform Capture
As an option, SIPROTEC® 4 devices can have waveform capturing that includes Se-quence of Event Report (SER) for the elements in the device. Furthermore, the ele-ments that are shown in the SER can be selected by the user.
The waveform and SER data are retrieved from the device memory by DIGSI®4 and are saved as waveform capture in standard COMTRADE format.
The DIGRA® 4 program is used to convert the oscillographic data into graphical rep-resentations that can be used to analyze the fault or the event captured by the device.
DIGRA® 4 calculates additional values from the waveform data, e.g. impedances and rms values, and displays the captured and calculated values in:
q Analogue Curves with timebase (Time Signals),
q Vector Diagrams,
q Circle Diagrams, and
q Harmonic graphs.
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4.4 Control
The multiple application possibilities for SIPROTEC® 4 devices require an equally flexible concept for command editing and control.
Remote If the device is integrated into a control system, then command outputs can be remote-ly controlled via the system interface using telegrams from
q SCADA or
q substation controller devices such as SICAM SC.
Local On-site, the SIPROTEC® 4 device offers the possibility to control a circuit breaker or primary switching equipment using the HMI.
For devices with a four-line display, control operations are carried out using:
• 0DLQPHQX → &RQWURO → %UHDNHU6ZLWFK → &RQWURO → Equipment and in-tended direction 21 or 2)) (Figure 4-9), or
• The Function Keys F1 to F4.
The functionality of these keys is programmable using CFC. Their factory default func-tion does not do any breaker control.
Figure 4-9 On-site Control Using the HMI 0$,10(18
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The status of a primary switch can be read out on the display using %5($.(56:,7&+
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Figure 4-10 Determining Primary Switch Status using the HMI
DIGSI®4 Control operations can be carried out using the DIGSI®4 Tool. Connect a PC to the PC-interface at front of the device on site, or communicate with the SIPROTEC® de-vice using a modem and the serde-vice interface.
DIGSI®4 must operate in the On-line mode for this function.
• Select &RQWURO in the Navigation window and double click on %UHDNHU
6ZLWFKHV in the data window.
In the dialog window that follows, all relevant primary control equipment is displayed in a table with the present status.
• Enter the intended device position in the Scheduled column. Answer the question with <HV.
The password is requested, the interlocking conditions are checked, and the com-mand is issued.
CFC Using the graphically supported design tool CFC for logic functions in DIGSI®4, infor-mation can be logically combined. Command outputs can be derived from the output of logic functions. The link of the output of the CFC functions to the respective device outputs is determined in the configuration matrix.
Password Only authorized personnel shall perform control operations. Control operations are protected by passwords.
Interlocking Command outputs are subject to interlocking checks, which can be configured individ-ually and graphically using the CFC logic too. Standard interlockings, such as ground switch closed status indication are already contained in the basic settings of the device when delivered from the factory.
Command Process-ing Times
Details about the command output time, checkback indication monitoring time, etc., are entered within the framework of the settings.
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Note:
The control option of DIGSI®4 is typically used during commissioning, and for test and diagnostic purposes.