Information Via Display Field Or Pc - Siemens SIPROTEC 7SK80 Manual
Motor protection
Hide thumbs
Also See for SIPROTEC 7SK80:
- Manual (512 pages) ,
- Product information (80 pages) ,
- Manual (42 pages)
Table of Contents
Advertisement
Functions
2.18 Auxiliary Functions
2.18.1.2 Information via Display Field or PC
Using the front PC interface or the port B at the botton, a personal computer can be connected, to which the
information can be sent.
The relay is equipped with several event buffers for operational messages, circuit breaker statistics, etc., which
are protected against loss of the auxiliary voltage by a buffer battery. These messages can be output on the
display field at any time via the keypad or transferred to a PC via the operator interface. Readout of messages
during operation is described in detail in the SIPROTEC 4 System Description.
Classification of Messages
The messages are categorized as follows:
• Operational messages (event log); messages generated while the device is operating: Information regarding
the status of device functions, measured data, power system data, control command logs etc.
• Fault messages (trip log): messages from the last 8 network faults that were processed by the device.
• Ground fault messages (when the device has sensitive ground fault detection).
• Messages of "statistics"; they include a counter for the trip commands initiated by the device, maybe reclose
commands as well as values of interrupted currents and accumulated fault currents.
A complete list of all message and output functions that can be generated by the device with the maximum
functional scope can be found in the appendix. All functions are associated with an information number (FNo).
There is also an indication of where each message can be sent to. If functions are not present in a not fully
equipped version of the device, or are configured to Disabled, then the associated indications cannot appear.
Operational Messages (Buffer: Event Log)
The operational messages contain information that the device generates during operation and about operation-
al conditions. Up to 200 operational messages are recorded in chronological order in the device. New messag-
es are appended at the end of the list. If the memory is used up, then the oldest message is scrolled out of the
list by a new message.
Fault Messages (Buffer: Trip Log)
After a fault on the system, for example, important information about the progression of the fault can be re-
trieved, such as the pickup of a protective element or the initiation of a trip signal. The start of the fault is time
stamped with the absolute time of the internal system clock. The progress of the disturbance is output with a
relative time referred to the instant of fault detection, so that the duration of the fault until tripping and up to reset
of the trip command can be ascertained. The resolution of the time information is 1 ms
Spontaneous Messages on the Device Front
After occurrence of a fault, the most important fault data is output automatically on the device display, without
any further operating actions. It is displayed after a general device pickup in the sequence shown in Figure 2-
92.
Figure 2-92
242
Display of spontaneous messages in the HMI
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
Advertisement
Table of Contents
