Table of Contents
Advertisement
Also the information transmitted to the control centre can be influenced during operation or tests. The IEC
60870-5-103 protocol allows to identify all indications and measured values transferred to the central control
system with an added indication „test mode" while the device is being tested on site (test mode). This identifi-
cation prevents the indications from being incorrectly interpreted as resulting from an actual power system dis-
turbance or event. Alternatively, you may disable the transmission of indications to the system interface during
tests („Transmission Block").
To influence information at the system interface during test mode („test mode" and „transmission block"), a CFC
logic is required. Default settings already include this logic (see Appendix).
The SIPROTEC 4 System Description describes in detail how to activate and deactivate test mode and blocked
data transmission.
Classification of Indications
Indications are classified as follows:
• Operational indications: messages generated while the device is in operation: They include information
about the status of device functions, measurement data, system data, and similar information.
• Fault indications: messages from the last eight system faults that were processed by the device..
• Indications on Statistics: they include counters for the switching actions of the circuit breakers initiated by
the device, maybe reclose commands as well as values of interrupted currents and accumulated fault cur-
rents.
A complete list of all message and output functions that can be generated by the device, with the associated
information number (no), can be found in the Appendix. There it is also indicated to which destination the indi-
cation can be reported. If functions are not present in the specific version of the , or if they are set to disable,
then the associated indications cannot appear.
Operational Indications
Operational indications contain information that the device generates during operation and about operational
conditions.
Up to 200 operational indications are stored in chronological order in the device. Newly generated indications
are added to those already there. When the maximum capacity of the memory is exhausted, the oldest indica-
tion is lost.
Operational indications arrive automatically and can be read out from the device display or a personal computer
at any time. Faults in the power system are indicated with „Network Fault" and the present fault number. The
fault indications contain detailed information on the behaviour of the system faults.
Trip Logs
Following a system fault, it is possible for example to retrieve important information regarding its progress, such
as pickup and trip. The start of the fault is time stamped with the absolute time of the internal system clock. The
progress of the fault is output with a relative time referred to the instant of fault detection, so that the duration
of a fault until tripping and up to reset of the trip command can be ascertained. The resolution of the time infor-
mation is 1 ms.
A system fault starts with the recognition of a fault by the fault detection, i.e. first pickup of any protection func-
tion, and ends with the reset of the fault detection, i.e. dropout of the last protection function. Where a fault
causes several protective functions to pick up, the fault is considered to include all that occurred between
pickup of the first protective function and dropout of the last protective function.
Spontaneous Indications
After a fault, the device displays automatically and without any operator action on its LCD display the most im-
portant fault data from the general device pickup in the sequence shown in Figure 2-70.
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
Functions
2.9 Auxiliary Functions
165
Advertisement
Table of Contents
