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Types of
Annunciations
2.45.1.1 Operational Annunciations
2.45.1.2 Fault Annunciations
Spontaneous
Annunciations on
the Device Front
7UM62 Manual
C53000-G1176-C149-3
annunciations have been acknowledged, the initial display is shown again.
Acknowledgement can be performed by pressing the LED button on the front panel.
The relay is also 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 retrieved, at any time, using the operating
keypad in the display field, or transferred to a personal computer, using the serial
operator interface. Readout of messages during operation is described in detail in the
®
SIPROTEC
4 System Manual.
Annunciations can be of one of the following types:
• Operational annunciations; these are generated while the device is operating:
Information regarding the status of device functions, measured data, power system
data, control command logs etc.
• Alarms; these are annunciations of the last 8 network faults processed by the
device.
• Switching statistics annunciations; these are counters for trip commands initiated
by the device, in some cases reclosure commands, values of shutdown currents
and accumulated short-circuit currents.
A complete list of all message and output functions that can be generated by the
device, with the associated information number (FNo), can be found in the Appendix.
The lists also indicate where each message can be sent. The lists are based on a
®
SIPROTEC
4 device with the maximum complement of functions. If functions are not
present in the specific version of the device, or if they are set as "Disabled" in device
configuration, then the associated messages cannot appear.
Operating messages contain information that the device generates during operation
and about the operation. Up to 200 operating messages are stored in chronological
order in the device. New messages are added at the end of the list. If the memory has
been exceeded, then the oldest message is overwritten for each new message.
After a short-circuit fault on the system, for example, important information about the
progression of the fault can be retrieved, such as the pickup of a protective element or
the initiation of a trip signal. The time the initial occurrence of the short-circuit fault
occurred is accurately provided via the system clock. Time progression of the short-
circuit fault is reported based on the moment of pickup, so that the duration, until the
trip signal is issued and interrupted, is available. The time resolution used for reporting
is 1 ms.
After a fault, the device displays automatically and without any operator action on its
LCD display the most important fault data from the general device pickup in the se-
quence shown in Figure 2-133.
Auxiliary Functions
287
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