Information On The Integrated Display (Lcd) Or Personal Computer - Siemens siprotec SJ62 User Manual

2.23.2.2 Information on the Integrated Display (LCD) or Personal Computer

Classification of
Messages
Operational Mes-
sages (Buffer:
Event Log)
Fault Messages
(Buffer: Trip Log)
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Events and conditions can be read out on the display at the front cover of the relay.
Using the front PC interface or the rear service interface, 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 displayed on the LCD at any time by selection
via the keypad or transferred to a personal computer via the serial service or PC inter-
face. Readout of messages during operation is described in detail in the SIPROTEC
4 System Description.
The messages are categorized as follows:
• Operational messages (event log); messages generated while the device is oper-
ating: 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 pro-
cessed 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.
The operational messages contain information that the device generates during oper-
ation and about operational conditions. Up to 200 operational messages are recorded
in chronological order in the device. New messages 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.
After a 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 start of the fault is time stamped with the absolute time of the in-
ternal system clock. The progress of the disturbance is output with a relative time re-
ferred 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 infor-
mation is 1 ms
2.23 Auxiliary Functions
318